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UTILIZATION

Very simple ... turn the knobs and pulls the switch

SOUND QUALITY

For my part I felt no deterioration of sound or color of sound

OVERALL OPINION

Frankly, I sought a real boost volume and no distortion boost, and I was on my ass, I'll walk around the shops near my house, she just happen to leave, I ask to try it, and I not expect something really powerful, but if! you set the audio level meter that will add is this is really great, a phone switch and the output volume really increases, it's great when you have no 2nd master like me, and more for me when I tried, there was no coloration of sound, it does not boost the distortion as a tube screamer or a ca Zakk Wylde but really increases the volume!
the only negative as usual is the price, whatever justified by the quality of this pedal
I heard from the seller, this pedal was created in collaboration with a former engineer mxr I think (Bob Bradshaw) who set up his own company CUSTOM AUDIO ELECTRONICS!
it is really very good stuff