Marshall Tone Stack Mods

The mids are quite pronounced as well. I think the Clean channel has a different tone stack than the others. Btw, its the mods Zakk used on "No More Tears"(The GOOD Zakk tone )!. Came with Mullard pre amp and AEG output. EVH 5153 100W Blue Channel 14. It’s also a great way to “tame” a 50 or 100 watt non-master amp, as the clipping circuit adds a characteristic distortion tone, as well as. Here is a collection of schematics of (and related to) the 18watt amp. Not sure why Marshall doesn't stray from convention and make a 1974x with a tone stack. Good for ribbon cable replacement ! Your mod changed the way the tone stack reacts, there are many mod you can try there, and listen to the result. Most postings, books, and amp tone videos dwell on amp brands and mods and swapping tube types and swapping speakers or pickups, but such priorities are backwards. There is an 18 watt "lite" circuit that has tremolo with only one input and sole tone control. If you own. 022uF, which is likely to be just a parts availability issue. I want a good smooth lead tone (sort of like Satch) and a nice rhythm tone (being able to play with feedback is a plus too!). This mod works better with the PPI2 Master Volume Mod installed so you can control the volumes better and maximize gain potential. This is a good stack, but it differs very much from the style used in Fenders and Marshall's and most all other amps that copy those. So I took this one in a more Marshall Plexi direction. Please send my appreciation to Dr. Even Marshall makes a 1-watt head now. Plug the Super 6 in to a ANY clean amp to nail that mid-60's American amp tone. Overall, the amp is extremely responsive. In general, the modifications I describe in How to Hot Rod Your Fender Amp can be adapted to other major brands of tube amps besides Fender, such as Marshall, Gibson, Vox, Ampeg, and Peavey. Setting your mid pot will affect your treble too. Kind of sounds like greek to me but your schematics and picture look great. 2K 680 to 1k 1. This Mod is really more of an upgrade. 1uF tone cap, and a new 0. That is where many amps get their distinctive sound. Ok maybe not a Marshall mod but a Hiwatt. I added a regular tone stack. Re: Sourcing pots for Rothstein PTB Tone Stack and Dual Vol Post by guitar-mod » Sun Oct 16, 2016 8:51 pm qryss wrote: Firstly: Andy, thanks for interjecting here with some additional help - and thanks in the first place for the circuit!. The design of the JCM800 1986 and JCM800 1992 amps departed from the "classic" Marshall Bass amp design and incorporated a better tone stack with a mid sweep and a slope control not found on the older JMP 1986 and JMP 1992 amps. to get the tone to match. MOD 101 DIY Guitar Amplifier Kit. The Circuit Design is exactly the same as the Combo but the Internal layout is Different. Marshall Mods Page. This modification is obviously deliberate, and it has substantial effects on bass and low-midrange response. A 1meg linear pot has been added temporarily to dial out the tone stack. ) 022uf output couplers that the earlier Plexi doesn't seem to mention …. Mains hard wire replaced by IEC. I’d go for the Wampler Plexidrive. Ergo the two bypass modes. 22uF will change how V1-A works : less bass, asymmetric clipping, a little less gain (R8 = 82k) ; you could try it while keeping your tone stack as is (modded). But the DLS' true Marshall tone stack is what made it my first choice - for my practice rig, I can tweak tones easily with real analog knobs as if it were an amp, and not have to fiddle much with virtual controls inside Bias. Perhaps some of you know a mod that could keep the basic Traynor circuit, but mod it for a Marshall 18/20 watt-like tone? Let me know what you all think. For this to work, you must be using 56k/250pf as the tone stack on the board, and use 82k and 250pf for the parts mounted on the switch. Official Tone Junkie Store 57 5e3 Deluxe! Seeking to capture the iconic tone of an original 1957 Fender 5e3 Tweed Deluxe amplifier, the 57 5e3 Deluxe Kemper Profile Pack beautifully captures this late 50’s tweed circuit that can reach from beautiful Fender cleans to “the best kept secret in rock music”. One of the things I wanted was to convert the normal channel into a gainier tone a la Marshall brown sound and be able to jump it with the verb/vibrato channel so I can blend the two. Pretty bright and chimey, but not harsh. Change the voltage divider to a 1 meg and 220K. 3) Change C3 to. I want a good smooth lead tone (sort of like Satch) and a nice rhythm tone (being able to play with feedback is a plus too!). The tone stack has an extended range. Once I add all the components into 3. Twin Stack Mod, 6. This just gives you an easily reversible idea of what it would sound. Marshall Bass 200W 3520 Schematic. The origins of the Super Champs tone-stack go back to Fenders four knob tone-stack control, first used in the 5F6 Bassman, becoming three knob TMB with a separated presence in the classic 5F6A. This is a fun little amp to modify and a great place to start if you've never done anything like this. Dear Amp Man, I am unable to find anything on cascading the half-unused tube in an AA371 Bassman. 047 µF capacitors. MARSHALL KILLER - Quilter Labs Overdrive 200 Amp Head - Usa. Ok maybe not a Marshall mod but a Hiwatt. (Kevin O' Connor acc. Btw, its the mods Zakk used on "No More Tears"(The GOOD Zakk tone )!. all i did was lift the legs on the r7 and r19 resistors. There are a ton of variations of this simple component – from the super basic models to more boutique “oil and paper” versions – but which one to choose?. It will turn your amp in to the more Ampeg VL/Metaltronix kind of range. Here are the values I used: C6 Silver Mica 250pF/500V C9 Mallory 150’s 100nf/600V C10 Mallory 150’s 47nf/600V. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. Both are 2 cascading triodes, followed by a cathode follower, into a FMV tone stack (TMB instead of Vox's TB), into a LTP phase. Both the slope resistor and the treble cap (500pF vs. The tone stack was already there, just non-adjustable. so i decided i had to mess with the tone stack on my champion 600. Actually that cap is after the tone stack in the circuit, so no matter what you do with the tone controls it's still dumping a bunch of treble to ground. More on that below. Each cab contains a 10″ Celestion speaker. Marshall Limited Edition Randy Rhoads Tribute Full Stack. The choice of the 1959 Bassman was inspired by the book Circuit Analysis of a Legendary Tube Amplifier: The Fender Bassman 5F6-A by Richard Kuehnel. It's an overdrive with a 3-band tonestack, and it was among the first overdrive pedals to use this type of tone control, allowing for more amp-like toneshaping via bass, midrange and treble knobs. The DSL20H TM is for those who need the full rich tone of a valve amp in a compact and portable format. 22uF will change how V1-A works : less bass, asymmetric clipping, a little less gain (R8 = 82k) ; you could try it while keeping your tone stack as is (modded). Actually that cap is after the tone stack in the circuit, so no matter what you do with the tone controls it's still dumping a bunch of treble to ground. Volume, Gain and Tone knobs let you customize your tone for blues to heavy rock!. In Marshall style tone stack, it is not possible because middle. You may want to change the slope resistor to 56k and remove the. The problem here is it is tuned for pretty strong mid range. So I took this one in a more Marshall Plexi direction. The Mod: This mod primarily involves reworking the tone stack and changing a few bypass capacitors. As for the difference between the 60s/70s models and the JCM800s, all I can tell you is that the circuit was not modified from the time the Super Bass was introduced (I believe in 1967 or 68) until the JCM800s were introduced. For the icing, I put in an ALNICO Weber 8 inch. The 5E3 tone control is a low-pass filter and (as designed) reduces so large a portion of the mid-high audio spectrum that more than just a bit of counter-clockwise rotation results in a significant loss of gain - enough so that any overdrive is lost while everything other than the bass frequencies remain. Z for offering this mod service. Removing this bright cap is a common mod for 2204 and JCM800 amps to cut ice pick highs and reduce shrillness. Followers 0. The new caps have corrected values to open up the tone and get rid of that boxy sound. The mods shown on the internet are for guitar and, maybe more specifically, rock guitar. "It’s easy to pile a lot of gain into a preamp, but very difficult to take that and make it stable and dynamically responsive. I have looked through tons of forums concerning this, however most focus on the ab165 circuit. 77909 What would you guys do to revoice the bass side of this bassman? I do not play bass, so it would be cool to have marshall tone on one side, with fender on the other. The MOD 101 Amp Kit measures 8 1/8" in height, 19" in width (including handles), chassis width is 16", depth is 8". Specification The original pedal was a great design that features tube-like amp stages, tube amp tone stacks, and a variety of tone shaping circuits that bring out the best in any. This channel produces pure Marshall crunch in spades, and what’s really amazing is that it can do it at any volume. Not sure why Marshall doesn't stray from convention and make a 1974x with a tone stack. The Friedmans do have the sat switch which is diode clipping, but it isn't on a pre-tone stack master like the Jose stuff. The tone stack mod has been included in the recreations. 1uF capacitor feeding the 'Treble' control, to more guitar friendly values. 5 thousand, with the modifications it would be around 118 thousand. Compare that to a Blackface Fender preamp: This is an AA165 Blackface Bassman and technically it uses 2 and a half tubes for the preamp, but if we were to make this a one-channel jobber we'd only need one and a half preamp tubes. I added a regular tone stack. It's a full on treble/middle/bass tone stack, but instead of pots, it just has fixed resistors with values chosen to replicate a marshall tone stack with everything at 10! So at least the cathode follower makes sense now, even though the whole idea of wasting a triode to drive a non-adjustable tone stack seems pretty stupid. 68uF bypass cap on V2 to drop the gain down a little if it's too much. Contact Me. Marshall MG15MSII Microstack is a complete Marshall stack that will fit into any room. It seems the designers were trying to compensate for the early tone stack placement by adding a final gain stage after a tone recovery stage, but, as you point out, putting the 470k/470pf network (you use 500pf in the MODS schematic) so late in the amp will not really duplicate the raspy sound of the 2204, which puts. Here is another video of my little Marshall Plexi amp built with 6F4P power tubes. Treble/Bass tone stacks usually have a "tail" resistor that connects the tone stack to ground, like 6K8 for Fender Princeton (in the case of the Twin Reverb, it's a 10K Mid pot), or higher value for Marshall (like 25K Mid pot). I had a blackface Super recently with too much bass and lower mids I replaced the. The Marshall Podcast. 022uF, which is likely to be just a parts availability issue. 047uf values. 12" speaker is going to be a tight fit. atrox wrote: I just got it back last night and I must say, it took care of any issues I had with my JVM. I added a regular tone stack. I like putting the reverb on both channels and then modifying the Normal channel and using an A/B/Y switch to use either channel. Oh yeah, I took out the negative feedback. There is an 18 watt "lite" circuit that has tremolo with only one input and sole tone control. Z for offering this mod service. Enjoy lots of harmonics, headroom and tone definition with awesome signal depth and harmonic structure. I had a blackface Super recently with too much bass and lower mids I replaced the. They’re the Filet Mignon of the amp world. Marshall even provides the holes in the PC board to mount it. Some of these may even surprise you. mods for the Blues Jr. Those looking for the true Marshall sound only need use an original, unmodified Super. Tone Stack patents. In general, the modifications I describe in How to Hot Rod Your Fender Amp can be adapted to other major brands of tube amps besides Fender, such as Marshall, Gibson, Vox, Ampeg, and Peavey. The Marshall SB tone stack has less midrange than the Lead model, so speakers with more midrange might be useful. Well, this book answered all of my questions and opened up some exciting possibilities for getting mo'better tone out of this amp: brownface or tweed tone stack mods, marshall preamp mod, dual reverb, different caps and values for different channels, channel bridging, which types of tubes to consider for more warmth. At this point, I would NOT encourage anyone to download or use 2. The preamp is currently fairly awful. Episode 1 is available now and kicks off with the guitar legend himself - Slash. It doesn't look like a Marshall tone stack. Convert your Epiphone Valve Jr. This mod will improve your Marshall's Clean tone. This enhances the action of the bass, middle and treble controls, increasing the dynamics of the amplifier. Power Supply Stiffening, 5. Using the tube from the Bass Instrument channel, the circuit is modified into the classic tube tremolo circuit. Some have exceptional ideas, while others just add a 12AX7 to the input of your Marshall. Marshall 9100 2X50W Schematic. Third, the rest of the preamp (and power amp and power supply) plays a big roll in setting the voice of the amp. I've left the normal channel mostly stock and really want more gain on the modded side. Here are some examples of settings by matching the EQ according to it's approximate equal shape, or a shape that will get a person to similar sound. The problem here is it is tuned for pretty strong mid range. It’s also a great way to “tame” a 50 or 100 watt non-master amp, as the clipping circuit adds a characteristic distortion tone, as well as. The MOD 102 guitar amplifier is a low-cost ($215) vacuum-tube kit sold by Amplified Parts of Tempe, AZ. Engaging the tone stack cut some of the lows, reduces volume overall, and allows for a brighter tone. This channel produces pure Marshall crunch in spades, and what’s really amazing is that it can do it at any volume. More on that below. Part of the Vintage Series; Introduced in 10. My amp tech looked over the Blue Guitar stuff and, after we talked over what I liked about the amp already, he advised me to just go with the input mods and try it out. If playback doesn't begin shortly,. 022uF Mullard signal cap replacing the 0. Essentially, the Dirty Little Secret was designed to accurately reproduce the same characteristics of the passive tone stacks found in Super Lead and Super Bass amps. The overdrive from the Normal channel is predictable from other blackface Fenders that I own. The other day I was reminded of a High Gain Mod I designed for the Marshall JCM900 Dual Reverb (Models 4100 and 4500) in 2015. Marshall Bass 600W 3560 Schematic. Eleven MK II The Amps. First, we wanted the 'all knobs on 10' sound, which makes the tone stack virtually bypassed. That's why one of my suggested mods was to remove the 'fake' tone stack and then there is no need for V2A, the cathode follower, because it's only purpose is to drive the tone stack, and it adds no gain of its own. Just to level set things, I ll use the SVT II as my reference tone. 25uF capacitors in the tone stack, and the. x will be o.   This gives you the ability to remove the mids all together in the first part of the pot rotation then bring them in as you turn it up, nice touch. x, version 2. All of us at Kustom Amplification are proud of what we do. I wanted to be able to take the sound of this stack with me to gigs easily, but not risk harming the amp. The overdrive from the Normal channel is predictable from other blackface Fenders that I own. The design of the JCM800 1986 and JCM800 1992 amps departed from the "classic" Marshall Bass amp design and incorporated a better tone stack with a mid sweep and a slope control not found on the older JMP 1986 and JMP 1992 amps. I have built several amps from kits and from scratch. Convert your Epiphone Valve Jr. 1uf orange drop C7=. The further away from ground you lift the tone stack, the more mids, but the less effective the controls are. Class A; Push Pull 6V6 - enriched fixed bias; Single channel: Treble, Mid, Bass. Jimi used 1966 Marshall Super 100 amps, and had the tone stack of the amps slightly modified to provide a treble boost and a bit more bass. Make your combo sound like an old California amp. 25uF capacitors in the tone stack, and the. - It has a 220pF cap across each 470pF treble cap in each tone stack (as with the Plexi Channel mods). This is one of my favorite amps and was one of the reasons I bought my Kemper in the first place. It changes out various Resistors (7) and Capacitors (3) throughout the Tone Stack. So, the end result gives the stock at a somewhat hot rodded JTM45 territory, the Bitmo mid boost adds to the other mods, to bring the tone into the Plexi area. On our first disc, we were a little unhappy with the guitar tones we got, so over the past year we’ve expanded our amp collection and knowledge. Les Paul Lover Duke of Orange Posts: 6774 Joined: Tue Aug 18, 2009 9:08 am Location: Derby, England. 68uF bypass cap on V2 to drop the gain down a little if it's too much. Some of our restorations include: re-voicing your tone stack, Pre-CBS Conversions, Tweed Conversions, Blackfacing your Silverface circut, restoring your tweed circuit, and even De. into a cathode follower buffer for the tone stack. In general, the modifications I describe in How to Hot Rod Your Fender Amp can be adapted to other major brands of tube amps besides Fender, such as Marshall, Gibson, Vox, Ampeg, and Peavey. Marshall JTM45 = 57. The Speed is now a tone control and the Intensity becomes a master volume. Overall, the amp is extremely responsive. Here's a link (there are others if you search under "AC15 bright cap mod:" Vox AC15 Mod Guide | END OF THE GAME The two modifications above made the amp really nice. Apparently, they modified the tone stack pretty significantly, and the controls are different. Contact Me. Tone Cap Update: Since the original modifications were done, I've changed from the 68pf tone cap to a 100pf cap, mostly out of curiosity to hear how big a difference it would make. The 20W skip the cathode follower, probably because they don't have an actual tone stack (just a "tone" control which is between the input stage. The tone stack mod has been included in the recreations. It's subject to change but I think this will be the general idea. Just like. What we have in the schematic is a preamp section with a footswitchable/manual switchable gain stage. A Useful Mod' for DC-coupled cthode followers: It is very common to see a DC coupled cathode follower in a guitar amp, often before a tone stack. Posted by 5 months ago. It utilizes a combination of top of the line Mustard style and Orange Drop Caps (oriented by ear) along with Carbon Comp RI in a simplified layout to improve the Tone of your amp across the entire spectrum. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. The best Marshall tone I've heard came out of the head through a Marshall basketweave 4x12 cab loaded with Greenbacks. For all comparisons, the Marshall tone stack is: Bass-5, Mid-6, Treble-7. Built using the best hand picked electronics sozo capacitors for the tone stack. 1N6263) – Transistors were different type (BC550C vs. Pre-built kit for main board and tone stack board in the works. 2K 680 to 1k 1. '68 JMP50 SN S11093. The MOD 101 Amp Kit measures 8 1/8" in height, 19" in width (including handles), chassis width is 16", depth is 8". Marshall’s generally do not feature great lush sounding MOD spring reverb. 680pF) are different from the Red channel. Mostly the TBM Marshall or Fender type tone stacks have a mid scoop that lends itself very nicely to guitars with magnetic pickups. It's a purist tone: bridge pickup for rhythm distortion, neck pickup for the solo and a dash of warm room reverb. The 'No Feedback' position makes the amp break up early kind of like a 5E3 Deluxe. Convert your Epiphone Valve Jr. Some mods in pre amp stage. I can make these amps sound #spectaculair#. And the amp, when needing just a bit more gain, takes very kindly to overdrive and boost pedals for those searing leads. Perhaps some of you know a mod that could keep the basic Traynor circuit, but mod it for a Marshall 18/20 watt-like tone? Let me know what you all think. Good for ribbon cable replacement ! Your mod changed the way the tone stack reacts, there are many mod you can try there, and listen to the result. At the least, replace the. Fender Champion 600 / Gretch 5222. It doesn't look like a Marshall tone stack. Tone Stack patents. Marshall 9200 2X100W Schematic. Plug the Super 6 in to a ANY clean amp to nail that mid-60's American amp tone. The MOD 102 guitar amplifier is a low-cost ($215) vacuum-tube kit sold by Amplified Parts of Tempe, AZ. With P90s and humbuckers I liked the engaging the tone control for cutting some low frequencies and dialing in some sizzle. Mods for Re-issue Fender Tweed Bassmans. But this ton stack will give you a 7dB drop in volume without the LPB1 gain section so you'll only want to use it with an effect that has plenty of volume already. Jimi used 1966 Marshall Super 100 amps, and had the tone stack of the amps slightly modified to provide a treble boost and a bit more bass. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. LONDON POWER Kevin O’Connor builds a full line of innovative amplifiers; he also writes the most authoritative books on the subject. Carter and features exclusive interviews with the greatest names in music. Setting your mid pot will affect your treble too. I read in a few places online about a mod that 'fixes' the Master Volume circuit that Marshall used in the 2203/2204 amps. Modification price: 199,00 €. There is a volume increase when the mid pot is turned up. 005uF capacitor. It's true that the circuit boards were re-arranged and the tone stack/signal path was altered (1984ish). If you own. Mods V Jr Original Silver/Gold "Marshallized" V Jr "Fenderized" V Jr R1 68K 1M 1M R2 68K 10K 68K R5 220K R6 1M Short out, or use 100k for less gain 100K R7 1M 91K - or 100k if R6=100k used. Basically, you're dealing with a real Marshall tone stack, and thus, you'd use the controls on the DLS as you would on an actual Marshall amp. At the least, replace the. And the amp, when needing just a bit more gain, takes very kindly to overdrive and boost pedals for those searing leads. Way too much gain, too little decoupling, lousy tone stack. Friedman Smallbox 13. These pages contain detailed directions to make the unused triode section in a Blues Jr. 1959 Super Lead 100 Watt and 1987 Lead 50 Watt "Plexi" Preamp. Marshall Mods Page. Orange is known for hard rocking, crunchy guitar tones. Rhoads' family unlocked the vault to Rhoads' amp and allowed Marshall's engineers to diagram the original modified circuitry. " How close is this tone, subjectively, to an actual Fender Bassman amp? I surmise that the original Bassman amps rely on the 4 10" speakers for more than a bit of their lovely tones. 14-Watt Guitar Amplifier with Baxandall Tone Stack Kit (#5887) This kit is a very clean-sounding 14-watt Guitar Amplifier. On the Axe-Fx you might need to set the Bass to 3, Mid to 7, etc. 0 production: 14/6/99: Build 25 released, added support for large fonts and to allow resizing of the window. Web-ified by Stephen Keller, it’s a more complicated tone circuit spread out across two triode stages. The mods sound great. The tone stack was already there, just non-adjustable. It has sustain with mids and highs that cut through the mix – perfect in a band setting. The Friedman amps are 3/4 tube gain stages depending on mode and all the 100w are pretty much variations on the same basic circuit. Change the voltage divider to a 1 meg and 220K. Jim Marshall, owner of J&T Marshall Musical Instruments, LTD, a music shop in Uxbridge Road, Hanwell, West London, and whose engineers, Ken Bran and Dudley Craven, had begun building amplifiers for sale in their shop in September 1962, notably the infamous. Marshall 9200 2X100W Schematic. The mod R10 2k, C4 0. The 'No Feedback' position makes the amp break up early kind of like a 5E3 Deluxe. Marshall even provides the holes in the PC board to mount it. So I took this one in a more Marshall Plexi direction. The preamp is currently fairly awful. It will turn your amp in to the more Ampeg VL/Metaltronix kind of range. Level, Tone, and Drive The Keeley mod adds a switch to the right side of the unit that changes the diode clipping style of the distortion. This is a good stack, but it differs very much from the style used in Fenders and Marshall's and most all other amps that copy those. Tone Stack mod-- Just slightly more difficult than the prior mod, this one involves replacing two caps in the tone stack with ones of different ratings. This software will allow you to change component values in not only the Big Muff tone circuit, but a few other tone control circuits as well. Tone Stack Mod. Standby Switch Installation, 2. Step 3, replacing the ubiquitous. However, the extra bass this mod provides reduces overall clean volume of the amp a little. That's why one of my suggested mods was to remove the 'fake' tone stack and then there is no need for V2A, the cathode follower, because it's only purpose is to drive the tone stack, and it adds no gain of its own. Easily achieved Medium to High Gain Tones that do not change the sound of the Guitar you are using. It doesn’t look like a Marshall tone stack. Since you've got a nice low impedance going into the stack, it really works, even with the gain cut substantially more than a 1987. In my own Twin I've used a 47pF bright cap,a 2. Marshall® DSL50 Parts: Marshall® DSL100 Parts : Marshall® Capacitors: Marshall® Corners and Handles: Marshall® Fan s: Marshall® Footswitch Boxes: Marshall® Fuse Holders: Marshall® Hardware: Marshall® Jacks: Marshall® Jack Plate: Marshall® Lights: Marshall® Knobs: Marshall® Pots: Marshall® Potentiometer Kits: Marshall® Power Cords.   This gives you the ability to remove the mids all together in the first part of the pot rotation then bring them in as you turn it up, nice touch. Though slightly higher priced than the Marshall kit, it does offer some premium features. I like putting the reverb on both channels and then modifying the Normal channel and using an A/B/Y switch to use either channel. It will accept your guitar input via a 1/4" phono jack. Change the voltage divider to a 1 meg and 220K. I actually own an entire 1972 Marshall Super Lead stack, profiles are of this head and the bottom cab. With P90s and humbuckers I liked the engaging the tone control for cutting some low frequencies and dialing in some sizzle. While the basic tone stack topology is relatively common throughout the Marshall lineage, each vintage has its own characteristics that make it work with their corresponding design changes. Of course there are accepted mods I sometimes make these amplifiers into the typical 'classic' circuit seen in 'Tweed' Bassman and Marshall amplifiers. SHVPES and Demob Happy join the. Marshall JVM410H Guitar Tube Amp Review. Came with Mullard pre amp and AEG output. The following Marshall Super Lead tone tips and tricks will enable you to get much more versatility out of this legendary amplifier. The bass is tighter, the cleans are warmer, the lead channels are more focused and tight, the crunch channel is less floppy, the gain is quieter and the thing sustains forever in any channel. Horseheads, NY 14845 "Established 1998" Voodoo Amps® has provided Pro Tone to the biggest names in the music business since 1998. Remod and restauration planned for 2. The speaker in the pics is an old, tired, fender speaker - doesn't sound good in this amp. Both the slope resistor and the treble cap (500pF vs. Friedman BE-100 "Marsha" 12. The tone stack mod has been included in the recreations. In this post, we will be looking at the variations of the tone stack circuitry in Marshall's early product lines. Measurement details: Fender Mustang II v2 amp models measured at minimal / very low gain setting to achieve least distortion of the measurement signal, any noise on some of the curves should be ignored. The design of the JCM800 1986 and JCM800 1992 amps departed from the "classic" Marshall Bass amp design and incorporated a better tone stack with a mid sweep and a slope control not found on the older JMP 1986 and JMP 1992 amps. Pre-slice and dice: Extra vol control installed after tone stack. Most pedal tone stacks use a single-band pass filter to either cut the highs or the lows from the signal. The guitar signal enters at left at the I "Bright. Level, Tone, and Drive The Keeley mod adds a switch to the right side of the unit that changes the diode clipping style of the distortion. I got the urge to put the old caps back in since I had the amp open and the tone became quite a bit brighter and harsher. In the "blunt" setting, the last stage is a "stock" Marshall Shredmaster. If a tone stack is followed by an overdrive stage, it can be used to control the dirt/mud/fuzz of the distortion. - Modified Tone Stack - Allows each Frequency (Treble, Middle and Bass) to sweep from 'Zero-to-Max'. " How close is this tone, subjectively, to an actual Fender Bassman amp? I surmise that the original Bassman amps rely on the 4 10" speakers for more than a bit of their lovely tones. The early 2205s basically have the tone stack in a weird place and so you have to dime the boost volume right off the bat and then use the master channel volume to adjust. A standard Fender tone stack uses 0. (It’s a dead-on reissue Marshall® did with crazy cool custom-made–vintage-recreation speakers and dual transformers to transfer the load of the 4 EL-84s!) The El Rey covers a lot of classic British amp tones by featuring two gain modes with the Power Toggle. Sounds like slash, Halen, Angus, Hendrix, Page tons of dial able tubed guitar tones. Came with Mullard pre amp and AEG output. 00; Original controls: Bass, Mid, Treble, Presence, Volume. Overall, the amp is extremely responsive. Can anyone elaborate on this? Re: School me on Marshall Mods. Hylight 4- input, hardwired mains lead, chrome metal logo plate, Partridge transformers PT: TG6. Marshall Live 2020. Ever heard of Slash? Lzzy Hale? While She Sleeps? Of course you have. The Hartke Tone Stack controls are also labelled Bass and Treble, but the enhanced. Typically, the ‘Treble Cut’ control is a 500K/1Meg potentiometer, with a. For a lower-cost option, I’d go with the BOSS Power Stack. Mods On A Marshall 3005 lead 12 Start by swapping op-amps, you can use all the op-amps that are used with Tubescreamers and they can all be found on ebay,. Sign in to follow this. The Hartke Tone Stack controls are also labelled Bass and Treble, but the enhanced. These heads don't have a very good reputation, so can be bought for relative little money. [It's often a good idea to add a large capacitor before the tone stack to block any DC that might get around your bypass. To give this control a more "logarithmic" feel, add a 25k between the wiper and ground. Add a 5uF cap across the second stage 10K resistor. Blue Moon Lite Schematic July 10. Enjoy lots of harmonics, headroom and tone definition with awesome signal depth and harmonic structure. Apparently, they modified the tone stack pretty significantly, and the controls are different. The Friedmans do have the sat switch which is diode clipping, but it isn't on a pre-tone stack master like the Jose stuff. 68uF bypass cap on V2 to drop the gain down a little if it's too much. I began this as a response to a forum question and as I got going, decided I would do an all out review/guide to the amp since it was so long. The DLS absolutely bests Bias' internal preamp sim for warmth and dynamics. 68/50V polyester. Note that this mod package is for the C1 model of AC4. I can make these amps sound #spectaculair#. Mains hard wire replaced by IEC. I want a good smooth lead tone (sort of like Satch) and a nice rhythm tone (being able to play with feedback is a plus too!). The legendary tone of Peavey amplifiers in a small, portable package! Our most rugged, lightweight powered audio mixers ever! The Most Advanced Modeling Amp On The Planet! The undisputed go-to guitar amplifier. Re: Favorite mods to the Fender Normal channel??? « Reply #22 on: April 04, 2010, 03:02:39 am » Since there is no mid control I would take out one of the inputs and add a 25KL pot instead of the 6. "We have designed countless Mods since 1998. com Stay safe and healthy. The Marshall Plexi guitar amplifier was an evolution of their very successful Fender 5F6-A Bassman copy, the JTM45 but with just two preamp gain stages it can't really be considered a "high gain" amplifier. Schematics show the use of 270pf treble capacitor in the tone stack rather than the 250pf usually seen, giving slightly more upper mids. The older Marshall circuits don't have less sizzle or distortion just less mid-range which makes that sizzle or distortion more apparent. Basically, you’re dealing with a real Marshall tone stack, and thus, you’d use the controls on the DLS as you would on an actual Marshall amp. Marshall also raises the values of C 2 and C 3 by 10 percent, from 0. Tone Stack patents. Steps 1, 2, and 3 raise the preamp stage gain and apply a Marshall-style voicing to the preamp. These became what we know today as the classic Marshall rock amps. In my book, the Lee Jackson mod wins. Marshall 9200 2X100W Schematic. I like putting the reverb on both channels and then modifying the Normal channel and using an A/B/Y switch to use either channel. 1uF capacitor feeding the 'Treble' control, to more guitar friendly values. It's a three channel amplifier with four EL34 and four 12AX7 tubes that features independent controls, a midboost, deep switch, tone shift, power reduction, output mute, reverb, line out, effects loop and more. x, version 2. com Stay safe and healthy. We'll go from the 1962 Bluesbreaker model all the way up to the JCM900 Dual Reverbs. Ken Fischer and Gerald Weber talk about the tone stack on the Bassman, and how it deviates from the schematic in practice. • The Hard Clipping mod is taken from the King of Tone and allows you to add hard clipping after the standard diode clipping section. Convert your Epiphone Valve Jr. First, you'll need higher Wattage speakers with a 100W amp and a 4x12" cab. I added a regular tone stack. My Marshall Jaguar 20 watt head originally had only a tone and a volume control. All you need to provide are hand tools, a soldering iron and solder. MARSHALL KILLER - Quilter Labs Overdrive 200 Amp Head - Usa. I added a regular tone stack. That is a very high value for the "mid" (62K)--try reducing that value, that will also reduce some of the bass. The Friedman amps are 3/4 tube gain stages depending on mode and all the 100w are pretty much variations on the same basic circuit. Ergo the two bypass modes. Mullard's tone control setup is optimized for hifi use so using something like a Fender tone stack woudld work better for guitar. One thing to note - NONE of these involve modification to the original Marshall circuit. I'll probably use the worthless "texture" control for the FAC. In fact, it is often referred to as the FMV (Fender Marshall Vox) tone stack circuit. Marshall JVM410H OD2 Red Channel 19. Re: Tube upgrade for Marshall dsl40c Originally Posted by Derpottsie Im playing most of the time in the 10:00 position on full power mode in lead 2 with the gain at about 9:00 and a tube screamer just barely dialed in at maybe 2 or 3. Here is a list of the mod steps. The tone stack mod has been included in the recreations. To give this control a more "logarithmic" feel, add a 25k between the wiper and ground. FIND US ON FACEBOOK @THEAMPFACTORYAUSTRALIA Founded by Patrick Quilter, the "Q" in QSC Audio, Quilter Labs is the culminationof a lifetime obsession with making the best possible tools for musicians. Let’s start with changing a few things in the tone stack (Photo 1), starting with the capacitors. Leaving every knob in the middle position rarely yields a “neutral” frequency response, and changing the value of one component will usually alter the response of more than one frequency band. I used this tone stack calculator to help me decide on the final values. Marshall Bass 200W 3520 Schematic. Original Poster 0 points · 5 months ago. The speaker in the pics is an old, tired, fender speaker - doesn't sound good in this amp. The guitar signal enters at left at the I "Bright. This unit will turn a small amp into a much larger sounding amp instantly. Since tube guitar amplifiers are the easiest thing in the world to 'play with', many 'gurus' have come out of the woodwork. It changes out various Resistors (7) and Capacitors (3) throughout the Tone Stack. The tone stack was already there, just non-adjustable. 2 250pF caps in parallel effectively make a 500pF cap. A relatively hard to find 30 watt combo and rarely discussed. Tone Stack, the type of tone stack used on this amp is the typical modified Baxandall style stack Carvin uses in all of it's modern tube amps. Mesa Boogie 3-channel. I think the Clean channel has a different tone stack than the others. amp's guitar speakers. Marshall BB-2 Bluesbreaker from small metal series. DOWN you have the Ultra mode. Episode 1 is available now and kicks off with the guitar legend himself - Slash. This pedal sounds great with a bass stock, but I did slightly mod it for a little more low end. Loosely based on the JCM 800. Related Links. Marshall Mod Prices. Being a tinkerer, I then put in some better tubes and a Celestion Blue speaker. Third, the rest of the preamp (and power amp and power supply) plays a big roll in setting the voice of the amp. 022uF Mullard signal cap replacing the 0. Fender Fat Strat with DiMarzio tone zone in the bridge. Fender, Marshall, and Traynor Tone Stacks I’ve recently begun recording a second disc with the band I’m in, Shayna and the Bulldog. 1987x Series Lead Circuit JMP 50I build these for fun and need to fund some other projects so letting this one go. The Benchmark – Marshall 1962 Combo “Bluesbreaker” Reissue. 046 and it fixed the problem perfectly. 14-WATT GUITAR AMPLIFIER with Baxandall Tone Stack "KIT ONLY" - $23. And have the tweedish setting as well. The Friedman amps are 3/4 tube gain stages depending on mode and all the 100w are pretty much variations on the same basic circuit. The Marshall JMP50 Model 1987 tone stack lowers the value of R 1 by 41 percent, from 56k to 33k. In Marshall style tone stack, it is not possible because middle. Make your combo sound like an old California amp. The legendary Spinal Tap axeman recorded the studio version with his 1959 Les Paul Standard into a JCM800. Marshall Amplification is a British company that designs and manufactures music amplifiers, speaker cabinets, brands personal headphones and earphones, and, having acquired Natal Drums, drums and bongos. good power attenuator. [It's often a good idea to add a large capacitor before the tone stack to block any DC that might get around your bypass. Expand to a total of 46 amps, 44 cabs and 101 effects available for purchase in the ToneStack store. Thanks for the mods, I must try the switch on the tone stack. Mullard's tone control setup is optimized for hifi use so using something like a Fender tone stack woudld work better for guitar. Amp Guys can do that. Sounds like slash, Halen, Angus, Hendrix, Page tons of dial able tubed guitar tones. What it does have is every combination of 100 watt JMP variation from the Plexi to the mid seventies Super Lead and Super Bass heads. 022uf Mallory 150's Change to. Vintage NOS Mullard “mustard” caps are introduced as part of the mod and the 125uF/16v caps are doubled on the bass channel’s cathode … this way, the amp stays vintage sounding as much as possible … the tone stack is pure JTM45, with one 0. This site features a tube data search engine and best of all, a Tone Stack Calculator. The four KT-66 output tubes provide a timeless sound (and a TON of volume!). Modern Rock/Metal I offer a Modern Rock/Metal for Haze to give it even more gain a a modern rock/metal type tone and tight bottom. This interconnectivity is key; operating one control may influence the behavior of the others. But things in the world of guitar amplifiers are often not as they seem. The DSL20H TM is for those who need the full rich tone of a valve amp in a compact and portable format. Friedman BE-100 V2 (w/5153 Tone Stack) 11. Simply click on the appropriate tab to bring up a different schematic. Compared to a classic Marshall tone stack, the Vintage/Raw tone stack moves the center of the "Mid" control down in frequency…. The Marshall Limited Edition Randy Rhoads Tribute Full Stack includes an all-tube 100W Super Lead head modified to the exact specifications of Rhoads' original amp. The mod also slightly increased the gain of the amps. Mullard's tone control setup is optimized for hifi use so using something like a Fender tone stack woudld work better for guitar. Mains hard wire replaced by IEC. 2K 680 to 1k 1. Make your combo sound like an old California amp. Just like. And have the tweedish setting as well. Marshall even provides the holes in the PC board to mount it. • The Hard Clipping mod is taken from the King of Tone and allows you to add hard clipping after the standard diode clipping section. 5 thousand, with the modifications it would be around 118 thousand. It has sustain with mids and highs that cut through the mix - perfect in a band setting. The mods sound great. This pedal sounds great with a bass stock, but I did slightly mod it for a little more low end. This channel produces pure Marshall crunch in spades, and what’s really amazing is that it can do it at any volume. So I took this one in a more Marshall Plexi direction. I remember when I got my first one. 022uf Mallory 150's Change to. Except with more gain than is available from a stock vintage Marshall. I used this tone stack calculator to help me decide on the final values. See the Tone Stack Mods link. Marshall Mods Page. You turn up any knob and you really hear the changes in tone. The Official Blackstar Amplification site, featuring Guitar Amplifiers, Guitar Amps, Effects Pedals, Merchandise, Dealers, Videos, Artist News. I mostly use single coils on it and run the mids higher and the treble a little lower on these amps for fat classic rock tones that work well for rhythm and leads. Good for ribbon cable replacement ! Your mod changed the way the tone stack reacts, there are many mod you can try there, and listen to the result. I took a look at the 2203 schematic - and the value there (coming off the 12ax7 to ground ahead of the tone stack) is 100k. The problem here is it is tuned for pretty strong mid range. Marshall Tone Stack Mod The current Randall SL+ as well as the original single channel Egnaters have the original Marshall mid circuit with less mid-range than the JCM800 amps. EVH 5153 100W Blue Channel 14. The Standard C5 Combo Tone Controls operate in a 'Preset Range'. Change the voltage divider to a 1 meg and 220K. 022, and the. If you do not see your amp listed please contact us!". into a Lite IIb 18 Watt amp using the "Baby Will" kit. Marshall JVM410H Guitar Tube Amp Review. Solid State Rectifier: with the exception of the Twin Reverb and a few Brownface designs vintage Fender amps used tube rectifiers which gave them a softer bottom end and singing quality to the sustain. We will discuss Tone Stacks later. 25uF capacitors in the tone stack, and the. It will accept your guitar input via a 1/4" phono jack. 047 µF capacitors. 22uF will change how V1-A works : less bass, asymmetric clipping, a little less gain (R8 = 82k) ; you could try it while keeping your tone stack as is (modded). The marshall amps has a lot of mids and when you try to dial out the mids the center frequency is too high. Things changed very quickly, however, as the tubes used in the old Bassman weren't readily available in the UK, so they switched to KT66. You may want to change the slope resistor to 56k and remove the. I first did this to compensate for the JVM having lower value treble and mid pots than a traditional Marshall, which shaves off a little more upper mids and I thought it was a little known way of addressing this (Santiago, have you been. And yes, it is. Some also like to use a 250pf cap in the tone stack instead of a 500pf. Marshall's guitar amplifiers are among the most recognised in the world. Instructions to perform the mods are included. The circuit we laid out on a circuit board is known as the LiteIIb. Marshall Mods by Voodoo Amps. Sean Coyle-Smith from Shame uses the Rocker 32 Natural Channel as a clean base upon which he builds. This is a good stack, but it differs very much from the style used in Fenders and Marshall’s and most all other amps that copy those. On the Axe-Fx you might need to set the Bass to 3, Mid to 7, etc. Vintage NOS Mullard "mustard" caps are introduced as part of the mod and the 125uF/16v caps are doubled on the bass channel's cathode … this way, the amp stays vintage sounding as much as possible … the tone stack is pure JTM45, with one 0. I recently found a demo with no mod description and it sounded very Marshall Plexi like on the lead channel. Another 6F4P Plexi video March 25, 2013 admin 0. Amp Guys can do that. Personally when I modify a tone stack, I usually mess with the caps instead of the slope resistor. Carter and features exclusive interviews with the greatest names in music. This just gives you an easily reversible idea of what it would sound. About the different models: The Peavey 5150 should need no introduction. back to TubeAmps2. This channel produces pure Marshall crunch in spades, and what’s really amazing is that it can do it at any volume. It's a fact that Mesa Engineering uses two modified forms of the Marshall tone stack for their Dual Rectifier series. the second one a cathode follower (to feed the tone stack) and the PI. Just curious What is your favorite mod to do to that unused Normal channel on a Fender amp. Note: The first four mods listed above (Clipping diode removeal, Tone stack, Cathode By-pass and Presence Control mods) I now refer to as the Stage I mods, in order to differentiate them from the new set of mods that I call the Stage II mods. The Marshall Podcast is hosted by Dan P. '68 JMP50 SN S11093. The JTM-1H employs two 12AX7 and one 12AU7 tubes in a Class A/B configuration, and Marshall says that the amp is "based on the JTM45 tone stack, as if the inputs had been jumped," which sounds about right, though with more gain on tap as mentioned previously. It also has a different power supply and a few changes in the power section. "It’s easy to pile a lot of gain into a preamp, but very difficult to take that and make it stable and dynamically responsive. The new caps have corrected values to open up the tone and get rid of that boxy sound. A Useful Mod' for DC-coupled cthode followers: It is very common to see a DC coupled cathode follower in a guitar amp, often before a tone stack. The output of the circuit is then the Tone 2 lug of the pot so you can also omit the Tone 2 wire connection to the board. Now, Malcolm's side: The two far left stacks. Well done Dr. The 5150II is a 5150 with an improved clean channel, and a modified distortion channel. First, we wanted the 'all knobs on 10' sound, which makes the tone stack virtually bypassed. Marshall Mod Prices. The 5E3 tone control is a low-pass filter and (as designed) reduces so large a portion of the mid-high audio spectrum that more than just a bit of counter-clockwise rotation results in a significant loss of gain - enough so that any overdrive is lost while everything other than the bass frequencies remain. If you are looking for more of a Fender Tone stack, you can play with the R and C values, but you will have trouble changing the potentiometer values since they are soldered directly to the Printed Circuit Board (PCB). Compare that to a Blackface Fender preamp: This is an AA165 Blackface Bassman and technically it uses 2 and a half tubes for the preamp, but if we were to make this a one-channel jobber we'd only need one and a half preamp tubes. I'll probably use the worthless "texture" control for the FAC. Tone Stack mod-- Just slightly more difficult than the prior mod, this one involves replacing two caps in the tone stack with ones of different ratings. 22uF will change how V1-A works : less bass, asymmetric clipping, a little less gain (R8 = 82k) ; you could try it while keeping your tone stack as is (modded). The previous tone stack was a little limited, so it was tuned up to have more range and provide a realistic, interactive response. There are a ton of variations of this simple component – from the super basic models to more boutique “oil and paper” versions – but which one to choose?. In my book, the Lee Jackson mod wins. But the DLS' true Marshall tone stack is what made it my first choice - for my practice rig, I can tweak tones easily with real analog knobs as if it were an amp, and not have to fiddle much with virtual controls inside Bias. The MOD 101 DIY Guitar Amplifier Kit comes with the stamp of Mod Kits excellence. I'm in the process of exchanging emails with a tech who's going to build a 6A20 with some requested mods. Changes the caps in the tone stack to the original values and reconfigures the Mid pot wiring. The tone stack mod has been included in this amp. Note that I have the "blonde" version, but the normal black Tolex version is the same inside. 047 µF capacitors. Rivera Product Line. 022uF Mullard signal cap replacing the 0. There's still plenty of adjustment in the tone controls. The problem here is it is tuned for pretty strong mid range. 77909 What would you guys do to revoice the bass side of this bassman? I do not play bass, so it would be cool to have marshall tone on one side, with fender on the other. This amp is the solution for minimalists who desire the classic Marshall vintage tone without the price and inflexibility of owning a loud and heavy Marshall Plexi half stack. This interconnectivity is key; operating one control may influence the behavior of the others. 1uF tone cap, and a new 0. 047uf values. They had me mod them and sold them as an alternative to the stock version being sold at GC's. One is a straight power amp while the other adds a tone control and volume control circuit to the input. Cheers, Tim C. This interconnectivity is key; operating one control may influence the behavior of the others. to get the tone to match. • The Hard Clipping mod is taken from the King of Tone and allows you to add hard clipping after the standard diode clipping section. This is a fun little amp to modify and a great place to start if you've never done anything like this. 12" speaker is going to be a tight fit. Vintage NOS Mullard “mustard” caps are introduced as part of the mod and the 125uF/16v caps are doubled on the bass channel’s cathode … this way, the amp stays vintage sounding as much as possible … the tone stack is pure JTM45, with one 0. Anyone interested in a deeper look into Big Muff tone control mods will want to try a piece of free software, the Duncan Tone Stack Calculator, from Duncan Amplification. 36watt TMB () () - Older original 36watt TMB r5 () () - Richie's latest design 18watt TRex - This is Lite II plus an overdrive TMB channel. Removing this bright cap is a common mod for 2204 and JCM800 amps to cut ice pick highs and reduce shrillness. If you do not see your amp listed please contact us!". Modification price: 199,00 €. There is a quality difference, but I always feel like offering a less expensive alternative. The mods I shared let you get a good balanced sound with all the controls at noon - and then you can shape from there. It's a full on treble/middle/bass tone stack, but instead of pots, it just has fixed resistors with values chosen to replicate a marshall tone stack with everything at 10! So at least the cathode follower makes sense now, even though the whole idea of wasting a triode to drive a non-adjustable tone stack seems pretty stupid. The Marshall Limited Edition Randy Rhoads Tribute Full Stack includes an all-tube 100W Super Lead head modified to the exact specifications of Rhoads' original amp. Check out what happened to it. Perhaps some of you know a mod that could keep the basic Traynor circuit, but mod it for a Marshall 18/20 watt-like tone? Let me know what you all think. Tags: marshall; steve vai. The Marshall JMP50 Model 1987 tone stack lowers the value of R 1 by 41 percent, from 56k to 33k. Make your combo sound like an old California amp. This amp is the solution for minimalists who desire the classic Marshall vintage tone without the price and inflexibility of owning a loud and heavy Marshall Plexi half stack. The mods are presented as achievable without cutting tracks or removing the PCB from the chassis. Schematics show the use of 270pf treble capacitor in the tone stack rather than the 250pf usually seen, giving slightly more upper mids. Now with two 4x12 cabinets loaded with "greenback" Celestions, and a 100-watt head, the Marshall stack was born and ready to usher in the era of the Guitar God. This is a good stack, but it differs very much from the style used in Fenders and Marshall’s and most all other amps that copy those. Being a tinkerer, I then put in some better tubes and a Celestion Blue speaker. The Marshall Podcast is hosted by Dan P. Click to open in a new window. The capacitor value is wide open for experimentation. It will accept your guitar input via a 1/4" phono jack. Ever heard of Slash? Lzzy Hale? While She Sleeps? Of course you have. 68uF bypass cap on V2 to drop the gain down a little if it's too much. The next consideration is the tone stack. Carter and features exclusive interviews with the greatest names in music. 1987x Series Lead Circuit JMP 50I build these for fun and need to fund some other projects so letting this one go. Jun 26, 2017 - Fender/Marshall/Vox Treble/Mid/Bass tone stack by RobRobinette. Even to do two standard MV circuits with a common tone stack and phase inverter would need five - two each for the preamps plus one PI.

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