|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
66.85.148.53
In Reply to: RE: As laughable as the ensuiing hate fest... posted by Michael Lavorgna on August 25, 2015 at 09:50:34
Yes, I thought you made it very clear to anyone who took the time to read the post that the product you were being sent was not designed for home use, and quite frankly, was being done at as a favor by the manufacturer.
I for one am interested in your findings, regardless of whether they jive with my belief system
Sorry, it may be harsh, but in my humble opinion without comparing far less expensive, high grade CAT7 cables not marketed to audiophiles, the AQ ethernet cable write up was seriously flawed. I do appreciate you followed up, but I think a bit of homework should have been done prior.
Back to etherent...the fiber isolation solution in this product is quite interesting.
Follow Ups:
Might be, but if you really want good isolation, a decent optoisolator might be in order.
I would second the general consensus that a high quality shielded CAT-6a is in order. It should cost $10-20 depending upon length, but it always should be tested. And if that helps you out in sound quality (and it might), then you can either stay where you are and enjoy the better quality, oir you can then experiment with the things like AQ's offering and see where that might take you.
If it offends your sensibility to the point where you aren't willing to try the things out, then realize nobody is forcing you. But if you think you'd have to go out and buy the things, you can always rent them from "The Cable Company" and not have much of an outlay if you prefer actual empirical experience to conjecture.
============================
As audiophiles, we take what's obsolete, make it beautiful, and keep it forever.
Hey! I have a blog now: http://mancave-stereo.blogspot.com or "like" us at https://www.facebook.com/mancave.stereo
If anything, it introduces the possibility of galvanically coupling two devices which otherwise would have been galvanically isolated.
As that's the only ethernet cable I've found that has the shield/drain wire attached to the metal shield on the RJ45-like plugs at both ends.
"As that's the only ethernet cable I've found that has the shield/drain wire attached to the metal shield on the RJ45-like plugs at both ends."
I cringe to ask...how are other companies terminating the shield? Hopefully not just left floating....
and it's almost not a real specification as of yet, it may be a moot point.
BUT, most cables have a shield running the full length of the cable terminated at either end in NOTHING.
And it hardly matters as none of my ethernet hubs seem to have grounded sockets.
CAT-6a can be called out with a "STP" (Shielded Twisted Pair) and "UTP" (Unshielded Twisted Pair).
CAT-7 is automatically SSTP (Screened, Shielded, Twisted Pair)
The thing that is difficult is that CAT-7 specifies a end connector (GG45) that isn't used in things that are billed as CAT-7. In reality you have a CAT-6 cable, that might actually bet CAT-5 in performance (if you do not connect the shields in the connector, you will suffer bad crosstalk and the speeds may drop as low as Cat-5.
Right now, you are probably best ordering a CAT-6a STP if you want max benefits.
=Signature=================
As audiophiles, we take what's obsolete, make it beautiful, and keep it forever.
Hey! I have a blog now: http://mancave-stereo.blogspot.com or "like" us at https://www.facebook.com/mancave.ster
Exactly my point.
Most interesting point is the lower 'delay skew' in the cat 7 cable which I assume is a product of the lesser differences in the twist rate of the various pairs.
Might make decent speaker cable after all. ;-)
What would be cool is if there was a shielded e-cable that had pigtail terminations on the ends of the shields to something like ring terminals (or whatever), and not make ground contact through a metallic jack. Give those inclined to mess with it the flexibility to try different stuff to solve their problems.
I've only seen shielded cable specified for runs in industrial environments. This is shielded Cat 6 or Cat 6a. The bulk cable comes with a drain wire, so theoretically you could terminate it with an unshielded plug and run the drain wire to a dedicated grounding point, but it wasn't designed to be used in that way. It's designed to be used with shielded plugs and shielded jacks on both ends for maximum effectiveness. The equipment at both ends should be properly bonded for safety.
If the shield is left floating at one or both ends, it will still provide some degree of RFI rejection, but not much protection from low frequency magnetic fields.
Safety bonding per local codes should never be compromised.It's true maximum shielding effectiveness requires bonding at both ends. Though, sometimes that arrangement will not prove to be the lowest noise performance achievable depending on the ambient EM environment and the system under consideration.
Circuit loops cause unwanted EMI noise current to flow through the loop whenever ambient background fields are nonzero. Whatever impedance this current flows through has an associated noise voltage.
Audible band EMI problems are a big deal in high gain systems trying to achieve 120dB plus dynamic range. PC's mixing with single ended audio gear seems like a twisted cruel joke from an EMI perspective.
It's possible a compromise in absolute maximum shielding effectiveness can be traded for an even lower effective noise floor elsewhere when dealing with problematic low frequency loop emi problems by replacing the DC ground at one end of the shield with a high pass filter. This allows safety bonding to be maintained per code, shielding to be used quite effectively though not at 100% theoretically best possible performance, and low frequency EMI problems filtered in high gain systems seeking to reject audible band emi problems.
The point is it might actually help somebody solve a real problem or at least a perceived one. Maybe there is a market for that kind of thing. Apparently people are buying cables with floating shields????? Why not this?
Edits: 08/26/15
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: