Perhaps somewhat off topic but related; I have a hydra and plug the tuner, cd, phono into it but prefer the pre amp and amps plugged directly into the wall. Someone above mentioned flourecents;. OMG did my fluorescent front porch light cause me a world of hurt until I figured it out! Stereo system was on its own dedicated 20 amp circuit, problem is/was at the panel all the negative leads in the panel shared the same circuit, only the positives were not shared. Once the front porch was turned on all hell broke loose! LOUD buzzing which fried tweeters, tubes, mid woofers; very expensive problem. Fluorescent lights pose a real problem. Avoid them or own sufficiently shielded components. My old Doge pre amp failed that test miserably. Solution: A very well built First Sound tube pre amp. And keep
the front porch light turned off when rockin'!
the front porch light turned off when rockin'!