I touched on this buried in another thread. But I want to get more information so I thought I would start my own. I have an early 70s SVT and I use an 8 ohm cab. My tech told me that I should use a dummy plug in one speaker jack to make the load 4 ohm. He said that using an 8 ohm cab isn't good for the amp. However, Jimmy (who I know is probably right) says that the dummy plug makes the load 2 ohm. I've put a considerable amount of time, energy, and money fixing up my SVT and I want to make sure I protect it. My main questions are: 1. Does the using the dummy plug in one speaker jack and an 8 ohm cab in the other create a 4 or 2 ohm load? The tech says normally it wouldn't work but does with this particular amp. 2. Does using an 8 ohm cab hurt the amp? Normally using an 8 ohm cab with an amp just lessens the power. If that's all it does, that should be fine as this is a loud amp anyhow. 3. Should I just panic and go get a 4 ohm cab just to be sure? If so I would be most interested in the SVT-212AV. Would that be a good match?