Yes, the LM386 is cool that way. You can easily use it with a single supply... I am going to the thrift shops this afternoon to scrounge up some speakers. I want to get a pretty big one (8-10 inches), but which is fairly light weight (smallish magnet). The idea is to keep the weight down for portability, but have a big surface area to make a nice deep bass drum sound. The 6" subwoofer I have is too damn heavy and actually sounds less deep than my nice vintage 8" organ speaker. I don't want to use my nice vintage speaker for this thing (save that for my next amp!), so I'm off to find a cheap one at the thrift shop. Once I get the speaker, then I can continue to fine tune the drum voice by fooling with the cap values. The idea will be to tune the drum sound to the speaker I end up buying, so that sound will be the best it can be for whatever speaker I end up using....