All-analogue compact boost effects pedal for electric guitar that provides up to +20dB of transparent clean boost which does not change the tonal balance of the amp. To achieve this, it mildly rolls off some top end starting at about 1 kHz so that when the amp's front end is driven harder with gain, the additional upper harmonics generated by the tubes are not excessive. Its 1 MOhm input is about the same as the front end of a good Marshall or other premium tube amp, not compromising the guitar's signal and not loading down the pickups. The pedal is equipped with 1% metal-film resistors for consistent tone, high-voltage poly capacitors for better tone and a rugged circuit board for tour-proven reliability. When it is not engaged, a properly engineered true hardwire bypass means signal passes entirely around the circuit, from input jack to output jack without a hint of loading.