Marshall Pre Amp Kits / Marshall 4 Valve Harma 6072A-12AY7 Retro Pre Amp Low Gain 55

Marshall 4 Valve Harma 6072A-12AY7 Retro Pre Amp Low Gain 55 Marshall 4 Valve Harma 6072A-12AY7 Retro Pre Amp Low Gain 55 Click on image(s) above to view larger

All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.

These specially chosen pre amp upgrades kits are designed to give deliver the sound that you want from your Marshall amplifier. Our low gain kits provide the cleanest sound in the pre amp stage which many players like. Our medium gain kit simply removes the edge off the sound and provides a later breakup when compared to a regular ECC83 type. The number in the title indicates the amount of gain reduction the kit provides. Our standard gain Classic kit is our most popular as this delivers a sound as close to the classic Mullard 3d midrange tone. With this kit you get a smooth warm crunch which is rich in harmonics and detail. Our High gain kit provides the same tone with earlier break up and maximum over drive. We then select these and supply these in special sets for Marshall Owners.
Gain reduction 55%

This 4 valve set is specially selected for Marshall Amplifiers and covers all Marshall Models that have a 4 valve pre amp section with the phase inverter in the V 4 position. These include Vintage & Modern models 2266c, 2266, 2466, DSL series such as DSL2001, DSL401, DSL50 & DSL100 and TSL series TSL60, TSL601, TSL602, TSL100 and TSL122 with a 4 valve pre amp section.

These sets are for the guitarist who wants the cleanest sound whilst getting classic Marshall Crunch at high volume levels when playing the larger venues. By putting this valve the V1 first gain position you will lower the gain of a pre amp circuit by around 55%, a reduction of typically 55 mu or 5 db of gain. This low gain results in a rounded clean sound which will give the maximum clean tone and tame the harshest of pre amps.

The set consists of 4 valves

1 Specially Selected Harma 12AY7 6072A Retro for position V1
2 Specially Selected Harma ECC83 Retro for V2 & V3
1 Specially Gain selected & Balanced Harma ECC83 Retro in V4

The Harma valves are specially selected for this kit using very tight gain parameters &
Gain selection of each triode sections. The valves are carefully selected for low noise and low levels of hiss and ambient noise with a signal to noise ratio better than -80dBV.



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