A Boost. Volume, switch, two mini switch for + / - gain and + / - Low ...

UTILIZATION

Reproduced on a echoplex preamp ... smaller.
Plug and play

SOUND QUALITY

A clean boost, which adds a lil something in the definition of sound
which makes it more enjoyable, more defined ...
I love to raise the general level when you drop the guitar volume to make a fuzz or a clean hot amps.

OVERALL OPINION

I love ... and then it is just a small and efficient!