Ok.. Ive got two questions about my Fender 300 pro tube amp. 1) Ive actually got two of these amps. They both work perfectly and have been real workhorse tone monsters for me. The first amp is tubed with Winged Cs 6550s and EHX in the preamp. It has a bit more volume and sweeter tone at identical settings to the other one. The second one is tubed with EHX 6550s and Tung Sols in the preamp. I have a passive jazz and a passive P bass. Whenever I use a passive bass with the second amp on the overdrive channel I get a loud squeal if either I have the overdrive channel drive above 7 or I have the tone on the bass wide open. If I turn the tone knob back about 1/3 the squeal will go away even with the overdrive on the amp turned to 10, OR if I leave the tone knob all the way open and turn the overdrive below 7 on the amp it will go away. Its not a feedback issue from being too close to the amp as far as I can tell.. Any idea whats causing this? It only happens with passive basses and only on one amp. Is it something to do with the gain of the tubes and their voicing? or??? 2) This weekend my band is playing a good old fashioned house show. aaaand like alot of those kinda things the spot we're playing, while known for hosting lots of bands, is not the most adapted to having lots of amps and power draw as sometimes multiple amps are plugged into the same source. SO FAR there hasnt been any issues there where the power has been killed or anything, BUT I have a choice between taking my Fender 300 pro tube amp, OR the Sunn1200s which is a rackmount version of the same amp that runs 750 watts. Which amp would have the lesser draw of power so I can play it safe for the spot? thanks guys.