O.k. I'm now running an Ampeg B2R head through and SWR Workingman 4x10. Now the head is hooked up to a compressor (I'm not sure what kind). And the problem is that when I have the head hooked up to the cabinet is sounds great (the best tone I've ever gotten) but; when I hook up my Ampeg 6x10 Classic everything starts farting. Not the Ampeg just the SWR. I've gotten it to stop but I have to turn the master volume way down. And also when I slide anywhere from like the 10th or 12th fret to below that (say around the 15th) my speakers also fart or clip. Now how can I get this to stop? Playing below the 12th fret is a must for me and I can't do it because whatever I hit makes the cabinet clip. I've got plenty of room for wattage cause the Ampeg can hold up to 1200 so I can't thing of anything that would fix this. Thanks.