I recently have upgraded my practice rig to a "open mic" rig. I picked up a Ampeg SVT 150 H on ebay rated at 150 watts at 4 ohms. When looking for a cab I wanted an ampeg but thought the 2 x 10 wouldn't cut it and searched for a svt 4 x 8 8 ohm. I am truly happy to find this cab I love it's sound sooo much punch. But now I'm thinking about the 75 watts or so I'm wasting. I'd like to get a 1- 12 or 1-15 8 ohm cab to get to 4 ohms. Can a 12 give me the lows I seek for my 4 string? Can I even power a cab with 75 watts? If so what cab is best? Anyone with the same equipment?