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I always try to put the turntable stand at a point where the floor is most rigid, like in a corner.

Actually Pin #1 is a shield, it's not part of the audio ground. Sometimes the shield is not connected at the receive end. The symmetrical part is when both signal conductors have the same capacitance to the shield. This is not true in all two conductor shielded cables. Some have different...

That's the way we used to do it. But for more modern thoughts, see: Speaker Break In: Fact or Fiction? http://www.audioholics.com/education/loudspeaker-basics/speaker-break-in-fact-or-fiction

The shield is the copper or aluminum wire that is spiraled or braided around the inner conductors. Although sometimes it's a thin aluminum foil. You can see the shield in many of the catalog cut-a-way photos.

Mogami has the best technical cable catalog available: http://www.mogamicable.com/pdf/Mogami_Tech_cat2011.pdf But I don't see any "unshielded" balanced interconnect cables?

Getting pre-attached XLR connectors through a conduit will take some planning.

Wow, Shunyata Altair XLR's! Aren't they about $500 per yard? I can't find any technical information about them on the web. Are they really symmetrical balanced analog audio interconnects? What's attached to pin#1 ?

Many recording studios run their mic level balanced analog audio cables through PVC or EMT conduit. Balanced XLR analog audio cables are shielded. Using conduit solves the building code rule problem about in-wall cables.

The best surge protection is "whole house surge protection" placed near the AC power service entrance. The point of use protectors do have some negative features, but now most homes have a dozen or more point of use protectors making this a moot point. Most protectors work by using voltage...

If it can handle a 3,000 Amp surge, I don't think it will restrict your amplifier's current.

Well yes lead will block RFI. I started broadcast engineering way back in 1965, while we did use sheet lead in the studio walls for acoustic reasons, we never, never ever used lead for a RFI shield. If you look through industrial magazines, none of the ads for shields are for lead products...

Back in the old days before environmental concerns eliminated the practice, thin sheet lead was used in the walls of recording and broadcast studios for acoustical purposes. But unless your interference problem is X-ray, then other materials are more effective. At very low frequencies mu-metal...

It's well worth going back and looking at the photos from past years, in this thread.

Gold contacts are only for low voltage (and even lower current) contacts. Gold is an excellent contact for phone cartridge and line level audio signals. But current wise Gold is very fragile, Plugging an amp in while it's switched ON can easily blow a hole in the Gold plating.

The only significant difference between a 15 Amp and a 20 Amp receptacle is the shape of the plug that can be inserted. Most of the internal parts are identical. The few that are not identical are made from the same material stock. The two good reasons for getting 20 Amp receptacles are: You...

For everything that you need to know about AC power wiring and Audio/Video rooms, the following papers total about 145 pages and are well worth reading. The Bill Whitlock of Jensen Transformers Seminar paper http://www.jensen-transformers.com/an/generic%20seminar.pdf The Jim Brown of Audio...

Only in building that use metal conduit (EMT) or metal flex or the wall framing is metal. In those cases, sometimes ground currents from other circuits flow through your A/V power grounds. If your house is wired with Romex® (NM) or plastic conduit, then an isolated ground servers no purpose.

Corrosion protection from all the floor cleaning that goes on in a hospital. I think that they plate all the metal parts.

That's a good article about code standards for receptacles. It's not easy to find any discussion about these standards. Now if we could find a discussion about the real world differences between products and brands, we would be all set. To me, much of the added cost for hospital grade goes for...

Really it's the "receptacle" that you are replacing. The "outlet" is the box in the wall. In another forum a very knowledgeable member posted this: RECEPTACLE GRADES I believe it's; 1.) Heavy Duty Industrial Spec Grade 2.) Industrial Spec Grade 3.) Spec Grade Commercial And then Hospital...