Last weekend I tried my Ampeg 8x10 (I think it's from 1970) with my old SVT and at pretty low volumes (volume setting around 3) it started sounding very dirty (distortion). While the sound wasn't bad, I just want a clean tone at low volumes. I then tried it with a Mesa 400+ (to check if the head was the problem), but the same thing happened. Then I tried to connect the SVT to my two alumabass 4x10 cabs and it went just fine, clean sound at high volumes. Same for the Mesa. So, pretty positive it's the cab. Is it normal for these old cabs to distort so easily? I recall when I bought it (months ago, didn't have a chance to play it until now) it was way cleaner. I changed to connector on the cab to speakon (the jack input was making noises): would this be what happens if you connect the wires the wrong way around? I'm asking here and am not trying since it will be fairly cumbersome to do so, so I wanna know if this could be the problem.