Low buzzing through speaks
Hello All,
Need some serious help here. So I just (upgraded?) from a Marantz AV8802A to a McIntosh MX122 preamp. I also just got brand new Revel Performa3 speaks all around (5 channel setup). I disconnect everything from the Marantz and then into the McIntosh, connect the speaks and I have a faint buzzing through all 5 speakers (that was not there previously). I have everything plugged into a Furman Elite 20pfi power conditioner which is plugged into a dedicated 20 amp circuit. My power amp is a Simaudio Titan HT200 5 channel. This is not going through the Furman but directly into the other outlet on the same 20 amp line. I even tried plugging the Sim amp into the Furman to see if that helped-no change faint buzz is still there. I have unplugged just about everything, and the buzz is still there. It is very faint and does not get louder when I turn up the volume. Again it is faint and you have to put your ear up to the speaks to hear but it is definitely there. I have tried so many things and nothing gets rid of it. It is not my cable box (I did have that issue previously with the Marantz but as soon as I unplugged the coax from the box it went away so I just bought a coax loop eliminator connected the cable to that and noise was all gone) as I unplugged that and started there.
Any help would be so sincerely appreciated????
So, @russ69 and @dpop the XLR ground lift adapters did not do anything, which I'm almost glad because wow were they a bi%$h to get in! The attenuators are arriving today via UPS. Let's see if they do anything. If not, I'm still going to try the RCA's just for kicks but that might be it (still may try the ground wire @dpop)...
Regardless as I've said this journey has been worth every second just because of all of you reaching out and taking much of your time to help and support😌... |
I just went around with this same problem. At full volume with no source playing I was getting 48.5 dB hum and hiss from each speaker. Loud. I finally traced it down to the subwoofer rca cables. I put in a different and better made cable and my hum and hiss went from 48.5 dB down to 35.4 dB. Wow!! that was a 13 dB attenuation of garbage noise! What an impact on the noise floor. Apparently it was doing a weird backfeed through the the preamp outputs I was using to drive the subs... |
