So, in light of the problem I'm having described here, I'm trying out different combos. Ideally I want a combo that is 300-600 watts, 50 lbs or less (40 lbs or less even better), something that will not hum and hiss... and I seem to have trouble with Class D amplifiers. Under $800. As far under $800 as possible. The Ibanez Promethean P5115K 210 500-watt combo would be perfect... it is discontinued, but there's a store on Ebay that has them for about $635 shipped. Extensive online research revealed it's about 40 lbs. The only problem is it's Class D. So I'm afraid it will be noisy. The other option is a Markbass CMD 102p. But it's 46 lbs and only 300 watts. And more expensive. But I think it's analog so will probably quieter. Anyone ever played the Promethean combo described above and have any noise issues? My house is well grounded and my amps are usually quiet. Even my Genz Benz Streamliner 900 which is also Class D.