‘MultiCab Simulator’ circuit build

[owlexifry]

found this layout and was curious to see how it actually sounds, so i had to build it





- re-purposed chocolate box does the job for now


running on 9V supply, it’s actually not as bad as i thought it’d be.
the B, T, F controls are fairly interactive and can cover a broad range of tones.

playing high gain tones it tends to fart out a little on low notes, but a tubescreamer/overdrive helps this a fair bit.
otherwise for blues, rock etc, it’s pretty good.

gonna try it at around 15-18V with x2 (used) 9V batteries in series, and see if there’s improvement.

 

[edvard]

Put a switch to change that input cap between the existing 100㎋, and a 10㎋. Those high-gain tones won't fart out anymore.

 

[owlexifry]

Put a switch to change that input cap between the existing 100㎋, and a 10㎋. Those high-gain tones won't fart out anymore.

great idea, thanks for the tip!
might try a few different values as well (22nf, 47nf) and see which works best without cutting too much low end

 

[edvard]

Depends on what kind of tone you're going for. Most modern high-gain sounds cut the bass pretty drastically up front, then add it back in later. The Fortin booster pedals have a wicked 18dB slope between 80Hz - 1000Hz with a bit of a peak at 1000. That keeps the baritones and 8-stringers in line, LOL.
Dropping the bass at the cab sim I think would work well for keeping the bass a bit "woolly" coming from the preamp, while still avoiding the farts.