The smallest amp I've ever practiced with was around 150 watts and it was just enough to get by. I once tried to do an "apartment practice" with an Ampeg BA-108 and a guitarist... it didn't work out, like at all. Save yourself the pain or ruining amps/cabs and save up for something more robust. OR get something lite now just to woodshed with and then get something more suitable later when you want to jam with friends.