Lowering the

My most recent obsession is with lowering the "noise floor" of my system. I have installed a dedicated 240V 20amp line to an Equitech blanced power transformer into which my two powered subs, tube preamp, CD player and SET power amp are plugged, with good results. I cannot part with my unbalanced gear and I like my unshielded silver interconnects. My question is this: How are the chassis ground and signal grounds within a component connected? What good does it do to "isolate" the chassis grounds of components when they are ultimately all interconnecting via the signal grounds? If all the chassis are grounded to a single point, and the signal ground is connected to the chassis ground, then why does one need the signal ground portion of the interconnect? It seems there really is no way to "isolate" a noisy component from the system. Forgive me, I am a neophyte, I don't "get" grounding. Thanks.
I cannot answer your question but I can tell you that all of the Shunyata Research products that use their patented 'FeSi-1000' compound would bring your noise floor down a few more increments (especially the Hydra). If you haven't auditioned one of these products in your system yet you owe it to yourself to give a listen. FYI I have zero affiliation with Shunyata… just a very satisfied owner.

Happy Holidays,
Brad, some components tie chassis ground and board ground together and others don't. I have always thought that they should be seperate and isolated, as this provides some type of shielding to the circuitry courtesy of the metal case. Obviously, this is not how all design engineers or builders think, so we are stuck with no uniform code for production.

Some simple hints that you are probably already doing or know of:

1) Keep your interconnects well away from power cords / transformers

2) If you can't avoid having interconnects run near power cords, try to have them cross at right angles. Having one cord run parallel with the other increases inductance i.e. "induces" stray magnetic fields and voltages into the signal lines

3) Remove and clean all connectors on a somewhat regular basis. Connections do oxidize even if you think that they are "secure" and "tight". JJ from AA has commented on this and stated that he can MEASURE distortion on a connection that has remained intact for 30 days or more. Simply removing and plugging a cable back into the same jack can lower distortion.

4) Do not place or anchor power cords along the vertical risers on metal racks.

Hope this helps... Sean
Hi Brad; if you haven't already done it, install good quality receptacles. I've used Hubbell Audiophile grade, Acme silver plated, and 20 amp Pass & Seymor Hospital grade with good results, but there are others-- some pretty expensive such as Wattgate.

I would think the PS Audio would be excellent too, but I haven't tried them. A hospital grade outlet is much better constructed and grips the male end of the plug much tighter than a standard hardware grade outlet as found in most houses. Good Luck and Cheers. Craig
Thanks all! Brad.