For Fender two channel amps made before 1980. The kit Increase the gain and overdrive of the preamp for Lots of easy overdrive and a cutting, strong tone.
The maximum performance from an EZ kit. All controls remain the same. The amp is just hopped up into the stratosphere!
For the reverb/vibrato channel - you will be changing some parts on the circuit board and tube socket to reconfigure the preamp circuit for a different EQ and much higher gain.
This is one of the very first kits developed and made a huge impression on the music world.
you see its technology in lots of modern amps today!