Dr Scientist Boostbot
Right from the Dr's mouth:
"The buffer/booster circuit is the same from the Reverberator, a very popular and great sounding clean boost that's clean and loud. It's op-amp based and built out of really nice components like WIMA film caps, Nichicon Muse caps, 1% metal film resistors, NE5532P op-amp, Neutrick jacks, Alpha clear shaft pot. The real time level meter is a neat vintage style 10 segment bar graph LED. They're high impedance in, low impedance out, can do a clean boost of around 20dB at 9VDC, safe up to 24VDC"