Official U.K. Dealer

1986, 1987, 1987T, 1959, 1959HW (reissue), 1962,1968, 1992, 2203*, 2204*, 2104, 2103, 1989, 2245 (JTM 45)

*2203 and 2204 amps (and related 2103, 2104 combos) made from 1976 until about early 1979 didn’t use shielded wire for pin 7 of the V1 tube. This wire is sensitive when added gain is put into the circuit and can cause oscillation/squeal when the preamp gain control is moved to about 6 or above. The correction, which Marshall did from the factory from around early 1979 and later, is to use shielded wire for that particular pin 7 and replace the non-shielded green wire. 

This is an encouraged update that should be made to the earlier amps by a professional tech so that they will operate more quietly, with or without the HMV2/Lynch Mod added to the circuit. This upgrade can be done at Overdrive Guitars.

1987, 1959, 2103, 2203, 2203KK, 2104, 2204,

2205 (1981-1983 models only),

2210 (1981-1983 models only),

4010, 4103, 4104,

4210 (1981-1983 only),

4211(1981-1983 only),

4212 (1981-1983 only)

2500, 2501, 2502, 2100, 2101

TSL 60 (in V3). For others, see reverse wire options below!

Standard wire in V3. Requires socket extender (now included with all orders as of 3/11/24 onward) and combo fastener kit.  Available to order separately.

Standard wire in V3

1987x (pre-2003 without Marshall factory effects loop), 1959 (without factory effects loop), 2245THW (handwired JTM 45 reissue), 1959 YJM

This new series of mini 20 watt heads require the removal of the L bracket and thumbscrew so that the units can fit into the PCB-mounted socket in the amp which does not use a base tube shield.

SC20H/SV20H heads – Standard wire compatible in V2

SC20C/SC20C combos when fitted with fastener kit, ordered separately.

Reissue (all years), 2203ZW (Zakk Wylde signature)

Model year 2003+ w/Marshall added effects loop

w/Marshall added effects loop

Randy Rhoads Signature

Model 2245, Bluesbreaker reissue combo 1962

Reverse wire model is compatible with socket extension now included with all orders.

Silver Jubilee Series

Vintage Modern Series

Origin Series

Any of the 'Mark' Series Amps.

Carvin Amps

Bugera 1960

Hiwatt DR Series

With amps such as those by Friedman, Mesa, and Soldano, it may seem counterintuitive to consider using our mods. However, our mods insert gain in an amp’s LATER stages, so what it enables is the ability to reduce the gain at the initial preamp front end control panel and get more articulation and/or put the amp in the “sweet spot” by not overusing its initial gain. Preamp gain controls generally don’t sound good in amps when they are maxed as they become loose/flubby. So by reducing the initial preamp gain on the amp but then adding the mod “downstream” in the circuit at the tone stack, you can bring back the needed sustain while also maintaining your note articulation.  The feel is very different from boosting the entire front end with a pedal though there is absolutely nothing wrong with that approach either.  With our mods, it’s NOT just about “adding more gain” in these applications but rather maintaining definition and note articulation with newly added sustain by the way the mods deploy the gain within the circuit. MANY customers have discovered this application in higher gain amplifiers and are enjoying the results.