It’s the DFA1979 distortion in a box. Double track it or split to two amps to get the filthiest wall of bass distortion you’ve ever heard. I recently had it serviced by Mr. DiCosimo and it works great.
Super loud, grindy, not-polite.
Three way slope switch is stock lows/ low cut/ extreme low cut. It is almost identical to the Big Game CVLT (F800B), and pretty much identical in sound/controls compared to Johnk's version.
$180 shipped CONUS OBO, run trades by me.