effclef:
Amen for proper grounding! As an Electrical (Power) Engineer, as well as an Electrical Inspector, I can attest to that fact. In addition, the effect a good AC power conditioner (with an isolation tansformer) has on an amplifier's noise floor is not insignificant. As an experiment, I plugged the AC cord of my new Eden WT-550 (w/ 2-210XST cabs) into my buddy's Tice Audio Power Block from his nearby Hi-Fi rack and the noise floor dropped just like that spinning amusement park ride (the Rotor?). Unconnected to an instrument and plugged straight into the wall receptacle, it had a fair amount of hiss...not so after plugging into the AC conditioner. OK, so the Power Block is bigger, weighs more, and costs about the same (i.e., new MSRP) as my bass head. The point is, noisy, poorly voltage-regulated AC mains are a common occurrence: a power conditioner can certainly help in this area. Let your ears (and your wallet) be your guide. Just my two cents.
Cheers,
Kevin
(Message edited by kmh364 on April 10, 2004)