I've assembled my power supply chassis for my new TSE 300B Amp. I'm getting a little buzz from my Power Transformer. It's bolted down tight to a 1/4" aluminum top plate on a wooden chassis. Should I try loosening the screws holding it down? Put some neoprene under it? What should I try? I can't hear anything while music is playing, but when it's not, and I get close to the amp, I can hear a little buzzing. Thank you all very much.