Just bought one and i have to say it is a nice preamp considering the price. It is powered with 9V dc. It has Off Axis-Center-Classic Mic Mods, Hot Wired-High Gain-Clean Drive Mods and California-British-Tweed Amp Mods. Tonewise its pretty versitale. If you want to do some recording via your pc and dont have a large budget i highly recommend trying this out.