A highly improved master volume for fender
and Marshall Amps
Going to Discontinue or redesign

Provides superior tone at high and low volumes. Can be a new installation or replace an existing master volume. One of the most amazing kits you can install on any amp, even if it already has a master volume.

For Fender amps made before 1986 (Two or four power tubes) and the Marshall JCM 800, JMP, Super Lead, Super Bass Original Plexi, Reissue Plexi, JTM45

The dual stage master is installed in the Phase Inverter section of the amp. Here the signal has been split into in phase and out of phase signals to drive the power tubes in push pull.

Since it is now controlling two signals the tone is much fuller and not thin at all. It also allows you to overdrive the Phase inverter tube - which other masters do not. Quite a bit more overdrive available

This kit takes some experience and knowledge of the amp circuit. You will need to identify the part of the circuit and follow the drawings carefully.

The kit is for a lot of amps and is not specific to a particular amp.

Dual Stage Master
Am539 amp kit$29.00
amp:: 
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FREE SHIPPING ON ANY ORDER OVER $60.00 - FREE!  (in the U.S. only)

We can install any and all of our kits in our custom workshop - email for info.

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We have all the parts and tubes for ALL the mods. check it out 

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Torres Engineering
2500 Alder #226
Milton WA 98354-7001
 Email   amps006@gmail.com