My Super Duper (SHO 2-in-1) clone will arrive tomorrow.

[Diego]

Yeah. I first tested it at the builder's house, through a Ibanez practice bass amp, with a Squier Bullet.
It was goddamn awful but the builder insisted I had to try it where it's meant to be; in front of some tubes.
It rocks that way. But I'm quite sure it doesn't just boost the volume, the SHO.

It's not a LPB-1 and it's not a Boss GE-7 with the volume slider up.
It does something funky to the dynamics, it does something with the electricity itself. It's not just a bass push or a mid hump or whatever.
It's something else, and it's goddamn brilliant.

[Brow]

Zakk always says that the high end brilliance this pedal gives come from the really high input impedence the pedal has. With the wrong amp/speaker/pickup combo it can get a little too much in the highs though in my experience. I love my Super Duper though

I read an interview with him once where he says he essentially took the original SHO circuit from an old audio engineering book he had where the circuit was used as a pre-amp for a mixing desk.