Seymour Duncan (yes, that Seymour Duncan) made a similar amp in the '80's called the "Convertible". I think it had also different tube effects that could be plugged in in various orders.
I haven't seen, heard or played one for years, but it was supposed to sound good but have serious reliablility problems. I remember it sounding awesome, but the guy playing it was a freakishly good player, so that's not surprising.
This guy could play a Wal-Mart/ASDA guitar through the cheeziest knock-off amp and in his hands it would sound divine.