Boost.
Plugs In / Out
9V power supply

UTILIZATION

A gain knob ...

SOUND QUALITY

Very good!
In addition to boost your sound, it adds a little presence I think.
We can move the volume pot at the foot concert, it's very convenient!

I use to be faster cruncher my HIWATT lamps, or to inflate the gain overdrive my Zvex.

in all cases, this boost, and it's effect!

OVERALL OPINION

I've had ... 4 years? 5 years?
With experience, yes I do it again this election.
Or I'd make a comparison of the Hard On Zvex (much more expensive ...)


voila!