Why do digital cables sound different?


I have been talking to a few e-mail buddies and have a question that isn't being satisfactorily answered this far. So...I'm asking the experts on the forum to pitch in. This has probably been asked before but I can't find any references for it. Can someone explain why one DIGITAL cable (coaxial, BNC, etc.) can sound different than another? There are also similar claims for Toslink. In my mind, we're just trying to move bits from one place to another. Doesn't the digital stream get reconstituted and re-clocked on the receiving end anyway? Please enlighten me and maybe send along some URLs for my edification. Thanks, Dan
danielho
Taxes are not "mandatory", nor are "mismatches" and "reflections". The more that one becomes familiar with and "works" the system, the less of each they may have to deal with. If one is really good and / or dedicated, it is possible to reduce any of the above to a point of negligence. Just because they are there does not mean that they should be "accepted".

Such is the case for signal reflection and vswr within a system. Why settle for 90% efficiency when one can have 99 - 100% ? The only difference is how much effort and money one is willing to invest to achieve that 10% improvement? When dealing with mass manufactured products, it is probably good enough. When dealing with small quantities of "high tech" products ( such as "high end" audio ), that is too much "waste" as far as i'm concerned. "Settling for" mediocrity or what is "good enough" never made me happy. Sean
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Sean,

I need to talk to your tax guy :-)

I agree with you 100% its all about the benjamins$$$
I never said i like mismatches... Why do you think i
spent big bucks on my cables... But there are still
other problems on the chain and unless you youself
are designing AND fabricating the product including
the transistors you are at the mercy of ACCEPTABLE
tolerances. Welcome to the real world.. I dont like
it either BUT its reality.

Maybe you can explain to me how to get better impedance
control than what the fab houses can fabricate the product
for? In other words we design these "low tech" 48 layer
10 thousand connection PCB's running at 10ghz and 50 ohms dead nuts on... Its like having 10 thousand interconnects in a 5 sq foot area... What are we gonna do have kimber cable wire us up something?
We are forced to rely on material and fabrication tolerances. There are only two board houses IN THE WORLD that can fab that PCB for that"low tech" backbone router.

How would you do it?
I would probably have to agree with the possible theory that differences in cable geometry(or connections) will cause differences in the delicate structure of sound to different degrees.(my theory..and only a theory). I DO FIND that cables sound very very different often, and DO AFFECT THE SOUND MORE DRAMATICALLY IN BETTER MORE RESOLVED SYSTEMS for sure. I am indeed a believer, from working in 5 high end stores, and being around high end audio and custom install for more than 20 years now, that cables make a difference!
I also find that the trend amoung those advocates that cables ALL BASICALLY SOUND THE SAME(if matched from a mechanical impedance standpoint, etc), THEIR SYSTEMS TEND TO ALL SOUND POOR OVERALL!!!
I once had a long conversation with John Dunlavy(Thanks john for the contributions to audio) at his factory about cables. He is an advocate that "CABLES IS CABLES" basically. The irony there is that his systems in his factory where, HANDS DOWN, the single WORST SOUNDING set-up's I've ever heard from a "HIGHER END" speaker manufacturer!!!! Infact, other people touring the factory were asking me why his speakers sounded so bad....I litterally had to defend his speaker's "merits", and say that "I'd gotten much better sound from his speakers elsewhere!"
On another occasion, I was at CES in Vegas a year ago, where I stumbled in to a room set up with Merlin VSM's with some nice high end gear. I asked the guy running the room "what wires and cables are you using?" He actually looked at me and said "you're joking right?"..."surely you don't think cables make a differnce, do you?" I said, "no comment!" I proceeded to listen to the set-up when he started playing the music, and IMMEDIATELY BOLTED UP FROM MY CHAIR!!! Not only did I hear the most bright and analytically sound from any of the rooms I encountered during the trip, but everyone else in the room immediately took issue with the sound as well! I didn't even stop to say anything to him...I think he pondered it all on his own from that point out.
My experiences, basically, is that the "cables-is-cables" advocates, are usually "closed-in" with their thinking, and can't see past their brains!!(limited processor and hardrive I presume...) These are the one's I usually find have the poorest sounding, if even well intentioned, systems!..go figure
Spluta: I was primarily refering to audio and low frequency RF gear. When you start hitting high frequency RF, you can have it. Things can get WAY "squirelly" REAL fast. I can understand that you have to take what you can get in situations like that, as there just aren't a lot of alternatives out there.

Foreverhifi: Out of curiosity, what was Dunlavy running for electronics at their factory ? I would assume that he had his Z-6 speaker cables, but do you know what was used to connect all of the gear ?

This brings up another topic. If the gear / speakers being used within a manufacturer's reference system sounds like "hell" and / or is set up poorly, how is it that they can really tell if something sounds "better" or if they have actually made an improvement to a product during listening tests ??? This is not to pick on John Dunlavy in specific, as i surely respect him for his knowledge and experience. Sean
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Sean,

Can i still have your tax guys number? just kidding.
I agree...audio and high speed are two different worlds
and I do get them confused sometimes...

Forever,

I think you brought up some very good points. The more
i think about it the more im thinking perfect length
of wires might not be ideal for audio. Hmmm.. So what do
you say guys lets sell different lenght MATCHED cables
and get rich?

Best regards