Hi all,
Thank you so much for the responses.
Zephr, I've tried unplugging everything else on the circuit. The buzzing still occurs with both the amp/speakers and the powered sub (independently). I've tried plugging the amps and the sub directly into the wall. No line inputs.
James, noise never has and still doesn't come out of my AVR, which is what I used before I got the amps. I never noticed the buzz coming out of the sub until recently, however, because it's quieter and not noticeable from my listening position. Speakers buzzing since I got the amps. However, I had an Emotiva A-300 amp for a while and I don't recall it buzzing. It didn't have a ground and wasn't as powerful. It might have buzzed but just more softly. I can't be sure.
Raindance, my interconnects are Blue Jeans XLR between pre and amps, Blue Jeans RCA between DAC and pre. Cheap RCAs to sub. However, this noise still occurs with amps and subs simply powered on with no inputs.The noise loudness seems to fluctuate, generally a bit louder when I first power things on. Could be up to 46db, but will chill out down to maybe 36db.
Todd, I don't presently have a different amp, except for the ones built into my AVR and my powered sub. I suppose I also have one in my headphone amp. There is no noise in speakers powered by the AVR or headphones powered by the headphone amp, but the noise is present in the sub. Oh, I did previously have a cheaper Emotiva amp and I don't think it made the noise. That being said, it wasn't as powerful and I don't think it had a ground. I just tried lifting the ground on one of the amps with a cheater plug. No change. And yes, that's correct: makes noise with ONLY amps plugged into wall, speaker cables to speakers with no inputs, with no sub. Same for sub with no speakers.
Thank you so much for the responses.
Zephr, I've tried unplugging everything else on the circuit. The buzzing still occurs with both the amp/speakers and the powered sub (independently). I've tried plugging the amps and the sub directly into the wall. No line inputs.
James, noise never has and still doesn't come out of my AVR, which is what I used before I got the amps. I never noticed the buzz coming out of the sub until recently, however, because it's quieter and not noticeable from my listening position. Speakers buzzing since I got the amps. However, I had an Emotiva A-300 amp for a while and I don't recall it buzzing. It didn't have a ground and wasn't as powerful. It might have buzzed but just more softly. I can't be sure.
Raindance, my interconnects are Blue Jeans XLR between pre and amps, Blue Jeans RCA between DAC and pre. Cheap RCAs to sub. However, this noise still occurs with amps and subs simply powered on with no inputs.The noise loudness seems to fluctuate, generally a bit louder when I first power things on. Could be up to 46db, but will chill out down to maybe 36db.
Todd, I don't presently have a different amp, except for the ones built into my AVR and my powered sub. I suppose I also have one in my headphone amp. There is no noise in speakers powered by the AVR or headphones powered by the headphone amp, but the noise is present in the sub. Oh, I did previously have a cheaper Emotiva amp and I don't think it made the noise. That being said, it wasn't as powerful and I don't think it had a ground. I just tried lifting the ground on one of the amps with a cheater plug. No change. And yes, that's correct: makes noise with ONLY amps plugged into wall, speaker cables to speakers with no inputs, with no sub. Same for sub with no speakers.