Low buzzing through speaks

@kingbr

You’re very welcome. I know how you feel about that. Once you heard it you cannot unhear it eventhough it’s only audible from inches away from the speaker’s tweeter 😁😁. What’s your speakers’ sensitivity? It’s even more audible through highly sensitive speakers (highly efficient speakers).

You don’t want want to use a ground lift XLR adapter or a 10db XLR attenuator, you don’t want to insert anything in the signal path as it would potentially degrade the signal purity thus will degrade and compromise the overall sound quality. Just leave it alone as is. Because you will be compromising the overall sonic fidelity (sound quality) while trying to fix or resolve something (faint buzz that’s only audible from couple inches away from your speaker’s tweeter) that isn’t even an issue to begin with.

Not all systems are dead quiet if you literally put your ear right up to the speaker due to various different AC induced environments in our homes. But it looks like you have the Shunyata AC power product and power cables in your setup. Shunyata makes great AC power products and power cables. I also use Shunyata AC power products and power cables in my setup at home but that faint buzz is still there when I use my Cary SA 200.2 ES power amp in the system, but then when I switch the amp back to the Classe amp the faint buzz goes away and is dead quiet. So, I know it’s the Cary SA 200,2 ES power amp (solid state) that’s causing that’s causing that faint buzz when I put my ear right up to the speaker (really close to the speaker). So, I just live with it since the Cary sounds better and more musical than my Classe Sigma Amp2 power amp. But I still have the Classe amp and decided to keep it as a back up amp (reserve). I mostly use the Cary amp since I like the way it sounds as it reminds me a bit of its tube amp counterpart since Cary Audio is well known for their tube gears. I have their SLP-05 vacuum tube linestage preamp in my setup and they make great combo. I only have stereo setup for listening to music only. I don’t do surround sound movies.

Trust me kingbr, just leave it as is and just relax and enjoy your music and movies.

LED light somewhere in the room, either a 5v or an LED of certain type bulb in traditional socket. Unplug it. See if that is it. 

Good point @markmoskow. If it already isn't the case @kingbr, try turning off all lighting in your place, and see if this makes a difference. I also agree with @dilatante. There are sometimes trade-offs in the audio world. In your situation, you will probably be *slightly* compromising the performance of the Transparent's when inserting any other device in them (like the attenuators or XLR shield lifters). Only you can decide what you want to live with. If this was my setup, at some point I would have shorted pins 2 & 3 on one of the XLR cables (at the female end, while plugged into the Sim), to see how much of this is being picked up by the cable alone. 

Agree with @dpop as it will be tradeoffs because you will be compromising the signal purity thus overall sonic fidelity (sound quality) everytime you insert something in the signal path. 

@kingbr 

I wouldn't get any XLR attenuator or any sort in the signal chain because you will be compromising the overall sound quality of your system slightly. Just leave it the way it is since the faint buzz is only noticeable from like couple inches away from the speakers anyway and has no impact on overall sound. Don't sweat it. 

So it would appear switching to RCS’s won’t make any difference, no?

The RCAs will be 3db down from the XLR connections. 3db might be enough to knock down the hiss a bit.