DSM Noisemaker OmniCabSim

A tweakable cabinet simulator for both guitar and bass.
Original FSB thread and still unverified schematic available here.

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Runoffgroove Condor Cab Sim

This was an old request.
You can find all info and schematic on Runoffgroove website here.

And a version with an added Notch Depth switch.

MultiCab Simulator

Here is a very nice project by Dschwartz from the DIY Forum.
You can find the original thread here
13/01/2017 Layout updated! Change 4n7 cap connected to Flat 1 to 47n.