There is some information here on the board but the SOB is just that, the ******* son and with that, it doesn't get much love. Most SOB owners seem happy with the amp until they play a Mark IIC+, III, IV or any other model Boogie. It is the dog of the line, one trick pony, yes, one trick only when it has no front end effects. I imagine it would work well as a clean platform amp with your distortion/over-drive coming from pedals. Starter Boogie IMO.