Marshall

Marshall Mods

 

FJA JFD 100 / Marshall #39 & #69 Mods

 

Listen to the original song at :10, the Marshall AFD at 3:21, and my Joe McSweeney JFD Clip 2 at 1:55 and decide which sounds most like the original tone!

 

Marshall Ultimate 80's Mods

Marshall 80's Mod +

Marshall SS Mod

Marshall Plexi Mods

Marshall DSL/TSL Mods

Marshall JVM Mods

Marshall Mods

 

Customer Video

 

 

 

 

George Lynch previously owned modified Marshall

Paul Gilbert previously owned Lee Jackson modified Marshall

Solo Boost on a JCM800 2203

Solo Boost & 2 channel mod on a Vintage Modern

I offer many different mods for Marshall amps from simple gain boosts to extra gain stages and effects loops. Tubes swaps (EL34, 6550, 6L6, KT66, KT88), re-voicing, restoring, master volumes, effects loops, preamp outs, half power mods, or basic maintenance. You name it, I do it. I work on Plexi, JMP, JCM800, JCM900, JCM2000, DSL, TSL, Vintage Modern, JVM, SLX, Silver Jubilee, Major, and 30th Anniversary models of Marshall tube amps but the JCM800 and earlier are my favorites. Email me with what your looking for and we can discuss all the options available.

Plexi, JMP, JCM800 mods

Standard mods My standard mods are my bottom line price to get inside that particular model amp and make circuit changes. While I do have a mod in mind based on customer feedback on that model, my mods are all adjusted to fit your needs and change the amp in the ways you need it changed.

Ultimate Plexi mod Tweaks the amp circuit to be truer to the vintage plexi tones.

Ultimate 80's mod Added gain and voicing changes aimed at the 80's type rock tones. Cleans up very well with guitar volume. This mod will get into modern rock gain levels too. No added gain stage.

FUPA mod - Jose/CCV type mod My version of the Jose/CCV/Atomica type tones mod.

Nick mod - Aldrich type mod My version of the Aldrich mod type tones mod.

80's Mod + Similar to the Ultimate 80's mod, but with an added gain stage. Cleans up well with guitar volume. No extra tube.

SS Mod Added tube gain stage for brutal metal tones. Modern metal and modern rock type voicing for deep, thick, thundering tones. Cleans up well with guitar volume. This mod can cover a lot of ground tone wise.

39 Mod My take on the SIR #39 amp mods as used by Slash and George Lynch. Added tube gain stage.

69 Mod My take on the SIR #39 amp mods as used by Slash and George Lynch. Added gain stage and effects loop with channel switching for added clean channel.

Output transformer upgrade The newer Marshall reissues tend to have a harsh, edgy high end giving the amps a very bright tone. These amps benefit greatly by upgrading the output transformer. The new OT gives the amp a warmer, more organic vintage tone with a creamy high end that sings. The older Marshall amps don't benefit as much from a new transformer.

DSL/TSL mods

Standard mods My standard mods are my bottom line price to get inside that particular model amp and make circuit changes. While I do have a mod in mind based on customer feedback on that model, my mods are all adjusted to fit your needs and change the amp in the ways you need it changed.

My standard DSL/TSL mods tighten the amp up and increase the gain slightly, improve the clean channel, and give the amp a meatier tone with strong crunchy mids that cut thru. As part of the mod I modify the speaker output design flaw which causes output transformer failure. My mods don't disable and break your deep switch like the competitions mods do. My mods don't neuter the gain like theirs either.

Gain levels can be increased to metal type tones or lowered for more classic tones. Voicing can be thickened up for a more modern rock tone.

Output transformer upgrade The newer Marshall amps tend to have a harsh, edgy high end giving the amps a very bright tone. These amps benefit greatly by upgrading the output transformer. The new OT gives the amp a warmer, more organic vintage tone with a creamy high end that sings. The DSL/TSL amps don't suffer as much as the other Marshall reissues, but a new OT can improve the tone.

Added choke Installing a choke in an amp that doesn't have one can improve the bottom end punch, sustain, feel, and noise levels. The DSL/TSL amps don't come with a choke from the factory.

DSL Effects Loop mod New effects loop mod designed by Graham Rangel-Sharp of the Marshall Forum. This mod addresses the added noise when using the loop at low volumes and adds transparancy.

DSL Foot switchable clean/crunch mod Another new mod designed by Graham Rangel-sharp of the Marshall Forum. This mod allows foot switching between the clean and crunch modes of the green channel.

Vintage Modern mods

Standard mods My standard mods are my bottom line price to get inside that particular model amp and make circuit changes. While I do have a mod in mind based on customer feedback on that model, my mods are all adjusted to fit your needs and change the amp in the ways you need it changed.

My standard Vintage Modern mod gives the amp a meatier tone with strong crunchy mids that cut thru. I offer several options for gain levels and voicing.

Two channel mod The Vintage Modern is essentially a Plexi circuit with a PPIMV (post phase inverter master volume). On the VM instead of 4 input jacks Marshall gives you one so you don't have to jump them like everyone did with the Plexi. The Detail channel is the bright channel and the Body channel is your normal channel and you mix them to get your overall tone. I find the Detail too bright and the Body too dark and I can't find a mix I like. Many people have asked me about making the volume levels between the high/low range dynamics closer so they were more usable as 2 channels. My two channel mod offers this. I modify each channel so they bost have a good mix of Plexi tones. The Body channel works the same and becomes the low range channel. The Detail becomes the high range channel and I add a master volume to this channel. The PPIMV still functions like it alwasy did. This gives you a low gain Plexi tone and a higher gain Plexi/JCM800 tone with volumes that can be matched. This mod involves drilling a new hole in the front of the amp (pics above).

X-treme metal mod This mod combines the two channel mod with adding an extra gain stage for over the top gain levels on the high range channel.

Solo Boost As you probably already know running a boost in the loop doesn't work on this amp. I can add a foot switchable solo boost to the VM. This mod involves drilling a new hole in the front of the amp and one on the back for the foot switch.

Added gain stage Adds an extra tube gain stage to increase the overall gain of the amp.

Added choke Installing a choke in an amp that doesn't have one can improve the bottom end punch, sustain, feel, and noise levels. The Vintage Modern amp doesn't come with a choke from the factory.

Silver Jubilee mods

Standard mod My standard Jubilee mod is modding the early circuit to the latest revision of the circuit. The early circuit was a bit brighter and had a few differences in the effects loop. I also offer an added choke to the 2554 combo. I can do other mods upon request, but I generally don't do anything too crazy with the Jubilee because they were a limited edition amp.

Added gain mod Added gain without drastic changes to the amp. Completely reversible to retain the amps value.

Oz mod Added tube gain stage for even higher gain. Prefer to only do this mod on amps that are already beat up and not in collectable condition.

Class 5 mods

80's tone mod I offer an 80's type tone mod for the Class 5 to give it a little more gain, stronger midrange, and tighter bottom end. I also offer a master volume option for the Class 5 mod.

Haze mods

80's tone mod I offer an 80's type tone mod for the Haze to give it a little more gain, stronger midrange, and tighter bottom end.

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. Closed back cab suggested for the tightest tone.

Marshall Mod Prices

All mods include a general check over, clean pots and jacks, clean and re-tension tube sockets, test caps, test tubes, and check bias

Plexi, JMP, JCM800 Mods
for models 1987, 1959, 2204, & 2203

FJA custom built Plexi clone amp

$1995 and up

FJA Ultimate Plexi tone mod (fine tune your reissue)

$325

FJA Ultimate 80's mod

$350

FJA 80's mod +

$375

FJA FUPA mod - Jose/CCV type mod

$395

FJA FUPA mod w/loop

$595

FJA Nick mod

$425

FJA SS mod (formerly signature mod) (added tube gain stage)

$495

FJA 39 mod - added tube gain stage

$495

FJA 69 mod - it's 30 better! added gain stage, clean channel, and loop

$895

Options

depth mod

$95

mid sweep mod

$100

5 position mid selector mod

$125

custom output transformer

$275 100 watt - $225 50 watt installed

tube effects loop

 $225 and up

tube type change (6L6, EL34, 6550, KT88)

$175 includes biasing (plus tubes)

foot switchable solo boost

$250

add 2nd channel

$325 and up

post phase inverter master volume

$150

 

JCM800 Mods
for models 2205 & 2210

FJA JCM800 2205/2210 mod

$375

depth mod

$75

mid sweep mod

$100

 

JCM2000 DSL/TSL Mods

FJA DSL/TSL mod

$375 ($395 TSL 60)

foot switchable solo boost

$225

TSL / DSL custom output transformer

$275 100W - $225 50W installed

DSL foot switchable clean/crunch mod

$225

DSL effects loop mod

$95

TSL / DSL custom choke

$100 installed

TSL footswitch rebuild/beef up - custom heavy duty cable with quality ends and detachable from pedal

$175

 

Vintage Modern

FJA Vintage Modern mod

$345

2 channel mod (low/high range)

$425 (includes voicing changes)

Xtreme Metal mod - 2 channel mod (low/high range) with added gain stage

$495

add choke

$100 installed

mid sweep mod

$100

multi position mid selector switch

$150

mid boost

$100 (different than the stock boost)

foot switchable solo boost

$245

 

JVM

FJA JVM mod

$375

FJA 80's type mod - Jose type

$395

add choke

$100 installed

 

Silver Jubilee

convert early revision circuit to last circuit revision

$295

added gain mod

$345

Oz mod - added tube gain stage

$495

add choke to 2554

$100

 

Class 5

80's type tone mod

$295

master volume - option for above mod

$100

 

Haze

80's type tone mod

$325

Modern Rock/Metal mod

$325

Other mods and custom work available