I just bought a brand new ampeg svt pro 7 last friday and at rather low volume it sounds ok.. not great but ok. Turned up to half volume it sounds horribly distorted on notes making a cross between a farting or a harsh cracking. My question is, what am I doing wrong exactly? I've heard/read great things about the pro 7 which is why I bought one but so far I'm not impressed. Thinking of returning it. The pro 7 has a one tube pre, solid state power amp 1000 watts at 4 ohms and 500 watts at 8. I'm playing directly into an SWR workingman 4x10 rated 400 watts at 8 using a passive bass. Prior to buying the pro 7 I was using a 1976 peavey 400 series bass head, 200 watts solid state. I had that turned all the way up on full and it sounded great through this cab and could be deafening but I wanted a fuller sound so thought a 1000 watt amp with tube pre amp with fit nicely. I want to play loud as all hell, I don't think I'm the only one haha. I've tried the gain on full and the gain turned way down both on the new head and it helps some but not a great deal. My only thought is that the cab isn't powerful enough for the head.. does that make sense? I really thought a 400 watt cab would be able to handle it better but maybe not. I know SWR makes the golite cabs that are rated at 800W. Does anyone think that would change things all that much and make me like this head?