Modifications are changes that are made to the amplifier to upgrade the sound, to optimize usage or to improve the quality and safety.

When replacing the power tubes, the current (bias) through these tubes has to be adjusted again.This is very important for a good sound and a reasonable lifetime of the power tubes. In many amplifiers there is no bias potentiometer. A bias potentiometer will be built-in to set correct current.

Many amplifiers, without a master volume, will only go to overdrive when the volume is set to 10. This is not always desirable. The solution is a build-in master volume. The pre-amp will go to overdrive without the power amp being at full power.

To cut costs manufacturers sometimes use capacitors of less quality. This signal capacitors are essential for a proper sound as they are in the signal path. Replacing these "cheap" capacitors will make the sound full and sparkling.

Marshall 6100 / 6101 - 30th anniversary:
Channel switching is not working when the amp is turned on. Sometimes 3 leds are on at the same time and the switches are not working. If the amp is turned off and on everything is ok. With a small modification we can solve this problem.

There are plenty of other modifications. Ask for the possibilities.

We would be happy to make a quotation for a particular modification. Fill in the form below and we will contact you as soon as possible