Midway Fair | 10 years ago
A demo of Runoff Groove's 2015 design, a 100W Marshall Superlead emulator, built on the 1776 Effects PCB.
Be sure to check out Runoff Groove's article about the pedal.
I need to apologize for a couple things on this demo.
First, I was way out of my wheelhouse on some of the songs I tried to learn for this, because I knew almost no songs played on a Marshall amplifier.
Second, I misunderstood how the treble (Top) and bass (bottom) controls worked and where they fell in the circuit. I thought they were standard Marshall passive controls, but they aren't; the tone stack is fixed and then they're active BOOSTS at the end of the circuit.
I do still feel that the circuit has a lot more treble than I was expecting; I'm used to Marshall amps being annoyingly dark, but this had more range on the treble than even I needed. I might go in at some point and swap out the 15p in the "phase inverter" section for a 68p to move the cut down to 5KHz, which is about where you'd have a rolloff on a typical speaker, and I might find the treble control to have more range. Or the presence control could be a little larger.
Gear used:
-My friend Keith's partscaster with filtertrons (closest I could get to a Les Paul/SG + Gretch)
-Sakura - the high-headroom modified champ I built. It's been modified since the demo I did after I first built it, and the lead channel has a setting with a flat response, so very good for demoing an amp sim. I was running it with a very small treble cut, because it's actually a pretty bright amp and speaker compared to most gear.
-George L's
-Fingers. Sorry pick fans! Make your own demo if it bugs you!
