Low buzzing through speaks

Hi @dpop!

No, no volume, no remote with the Sim...

OK thank you kingbr for confirming.

I know that some of these cable manufacturers charge an arm and a leg for some of their cables (which I will never pay for), but the construction of each, between manufacturers, is not always the same. Where one might put more emphasis on their shields, another may put more emphasis on the conductors carrying the signal (in balanced mode). Unless the cable manufacturer posts pictures of inner cable construction, you really never know what you’re getting until you try them, and how they will perform in your environment. Having already dealt with so much interference in the past (CB’ers, radio station RF, neighborhood ham operators, etc), I know that a well made shielded cable (like a Gotham), and a low impedance star ground system is always what’s needed in my audio systems, and audio systems that I build for others. For me, shielding takes top priority. Next on my list is (low) capacitance. I’ve already found that when I upgrade to a lower capacitance cable, I can almost immediately hear the improvement. I am also fortunate and thankful that I can make my own cables.

Thanks again @dpop! I have always found Transparent cables to be more “my taste” if you will. I have used several others but there just seems to be something extra once I bring in the Transparents. I love the speaker cables and IC’s, however I don’t care much for their power cables. On that I’m strictly Shunyata. I have no scientific data to prove any of this, just my ears😬! 
 

The ground adaptor I ordered from Amazon arrived late today so I won’t have a chance to connect that until tomorrow AM. Also the 2 ground lift cables from Parts Express I ordered via the link you sent are arriving tomorrow…I’ll have an update on the Amazon one in the AM and will update also again after trying the 2 cables from Parts X…

So you mentioned Ned that high gain of the Sim amp. Might a 20db attenuator be needed? I did see a few of those while I was browsing?

Ned??? I have no idea where that came from😂! Damn auto-incorrect!

@kingbr 

Are you sure what you are hearing is an actual faint buzz, not a hiss coming from the speaker's tweeter? And you only heard it within half a foot away from the speaker, correct? And this only occurs with your Mac but not with the Marantz you had previously? It's possible that the Mac preamp's output gain is higher than that of the Marantz but it still shouldn't be buzzing IMO. 

But if the faint buzz is audible only when you put your ear right up to the speaker I wouldn't sweat it if I were you and as long as it doesn't distract from your listening to music or movies. And you said it isn't audible at all from half a foot away from the loudspeaker. Are the buzz on all speakers or just the front main LR speakers? 

I have exact same experience as you do with my current Cary Audio SA 200.2 ES stereo power amp (solid state). it's a faint buzz and is only noticeable when I put my ear right up to the speaker. This didn't happen when I had the Classe Sigma Amp2 power amp, it was dead silent. But when I swapped the amp to Cary with everything else unchanged I could hear a faint buzz when I put my ear right up to the speaker, and it's only audible within less than a foot away from the speaker. Apparently this faint buzz is pretty common with this Cary SA 200.2 ES amplifier design. I had discussions with other Cary SA 200.2 ES users on different forums and some could notice a faint buzz but some don't. 

I wouldn't sweat it if I were you as long as the faint buzz doesn't grow louder over time and as long as it doesn't distract from your listening to music or watching movies. You aren't alone in this.