Not sure what to say about this circuit. Looks like a fun preamp with a built-in speaker emulation, and it’s supposed to sound really nice. I took the liberty of simplifying the DC input circuitry a bit (the schematic called for a complete bridge rectifier). Also, the original is a buffered effect, but I tried to set this one up for true-bypass wiring instead. Hopefully it’ll work.
Update (20.12.2012): Built it tonight and it works great. I have to say this one sounds really good! Verified.
I know some of you have had problems building this so here are the voltages on my build.
Power supply: 8.89V
All pots at approx. noon, “Rock/Classic” switch set to “Classic” and the speaker emulation set to off.
I made two non-critical substitutions; I didn’t have any 680 ohm resistors and so used 510 ohm ones instead, and I used 220uF/25V electrolytics in place of the giant ones the original calls for.