on that note (sorry to hijack) i've just moved, and i have a very distinct buzz (more square wave shaped) commin' outta my monitors (no furman ) but i can accually hear it happening physically inside the amp somewhere, along with the same sound reproduced by the speakers....i'm runni'n through channelstrip surge protectors (which are not helping nor hurting)....there IS a floressent light in the closet, but it only pops all things speakers when switching on and off, the buzz is unaffected.....is it time for me to learn how to properly ground a house? or can i use spare speakerwire and chuck it out the window and make my own? (j/k)
thanks, and sorry jaffa, you just reminded me to ask these guys.
> Anybody used an hum eliminator device like an Ebtech and does it have an effect on the sound at all? <
Yes, the Ebtech unit does affect the sound a little, and it has poor headroom so it breaks up at higher levels. I have an eight channel model I'm not using anymore if you'd like to buy it.
All such devices are based on audio isolation transformers. Good audio transformers are expensive because it's tough to make transformers with a good frequency response and low distortion. I've used Jensen transformers and they're excellent, but they are not cheap. Much better is to track down the problem at the source. For example, if your gear offers balanced connections, use them instead of regular unbalanced cords. Or if you have noisy solid state light dimmers (which an audio isolation transformer won't help anyway), replace them with variable power transformers.
what about their hum-x product that actually plugs into the wall? i can't imagine that affecting sound quality since you wouldn't be running audio signals through it..
I bought one of these when they first came out to resolve a ground loop issue at my old location. Most of my gear had a common ground except a small cache of gear plugged into a remote outlet -- the Hum-X worked as promised for that issue. Since it doesn't sit in the audio path, I'm guessing there's a reduced risk of it affecting the audio quality. I didn't notice any change except the missing hum.
For this sort of thing, I would think software is the best way to go, since you probably will be introducing some frequencies in your sound using anything that has a power supply. That said, I only use Waves' X-Hum for material that needs hum removal.