The IndyGuitarist website quotes:Our new Plexi-drive is our all-time best seller. It absolutely *NAILS* that "JTM45" tone like none other. Built as a cross between a "Marshall 18" and a JTM45, this pedal was designed to sound and react eerily similar to the famed Marshall Amp. Includes a switch that enables it to sound great with either clean sparkly amps (like fender twins, Vox, etc.) to darker beefier amps (like Vintage Marshalls, Mesa Boogies, etc)
Plexi-drive page at IndyGuitarist's website...