[GreenKeys] Denon AKDL1 Dedicated Link Cable

Fri Jul 1 11:23:54 EDT 2011

Gentlemen,

I hate to do this....  a tidbit that relates to TELETYPE because many TELETYPE 
owners also have STEREO'S....

All correct - audiophiles are by and large ignorant, sometimes very rich, and 
gullible as hell.  This is the opposite of TELETYPE owners.   But there is one 
thing that makes a BIG difference in the sound of most modern high qualityy 
loudspeakers, and that is the resistance of the wire connecting the amplifier 
and the speakers.  So if there is any appreciable length between the amplifier 
and the loudspeaker this has a substantial effect.  Anybody can hear it if they 
are paying attention.  It affects the damping factor of the system (i.e. 
effecting the source impedance of the driving amplifier).  This is less a factor 
in a system with a passive crossover networks but with direct coupled 
(bi-amplified) systems it is very audible.  

In the recording studios years ago we looked into this for a different reason - 
we used to blow out a lot of speakers due to high SPL's - and we found that if 
we paid attention to the system's damping factor the speakers lasted a lot 
longer.  In the process we noticed a big difference in the low frequency 
reproduction.  Our test method was to insert a rheostat into the woofer 
amplifier ouput and do some 'destructive' testing.  The upshot:  we had less 
trouble blowing out the loudspeakers if we a) chose the amplifier with the 
lowest output impedance (in those days Crown DC300A); b) REMOVED the fuses from 
the speakers (!);  c) chose the AWG of the wire large enough not to 
significantly affect the damping factor of the amplifier.  We had about 75' 
between the amplifiers and the speakers.  The DC300A was (and still is) a very 
good amplifier and if I recall had a damping factor of 1000 at 16 ohms.  We were 
using 16 ohm speakers (Altec 604E).  This means the output impedance:  16/1000 = 
.016 ohms.  You can see that the cable can make a difference.

This same effect (output impedance) was one of the reasons there was such a 
controversy (still existing) between vacuum tube and solid state amplifiers.  
Vacuum tube amplifiers are a whole different animal in the output impedance 
department.  We could make our DC300's sound a lot like our McIntosh 100's by 
matching the output impedance, thereby changing the characteristic of the 
speaker it was connected to.  A simple but little recognized fact.

Enough?

Gerry
AD6MC

________________________________
From: zeke440 . <asekely at hotmail.com>
To: captainkirk359 at gmail.com; greenkeys at vaporland.com; greenkeys at mailman.qth.net
Sent: Wed, June 29, 2011 5:30:59 PM
Subject: Re: [GreenKeys] Denon AKDL1 Dedicated Link Cable

LOL Love those comments...  re-grew a severed arm and helped AL to solve  Global 
warming... WOW ! gotta have one!

While working at a known "shack" I attended a sales confrence where a cable 
company 

actually wanted me to sell their product in the "snotty Audio price range"  
useing a sales line that toted the cable was made up of 
"differing lengths of Spirialed-as well-as Straight wires" 
because we know that all sounds are made up of complex multi-frequencies...
the cables were "tuned to deliver all the frequencies to your ear at the same 
time"...

hummmmm...  Well I did sell a few... but never did use any of the sales pitch 
fed us by the company or "shack"
most of them went to the "guy that read all about it and was convinced he had to 
have the best"
And I bought my lamp cord at the local $ store... 

Andy 

> Date: Wed, 29 Jun 2011 17:58:06 -0400
> From: captainkirk359 at gmail.com
> To: greenkeys at vaporland.com; greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Denon AKDL1 Dedicated Link Cable
> 
> Oh no, it's probably a real product. But the reviews *LOVE* to rip on
> products that are hilarious. Like the whole "Three Wolf Moon" shirt.
> :P
> 
> And yeah, I knew you were joking about connecting to the VT-05. But
> you could technically use the ultra-expensive cable with it... if you
> had a "pimpingly awesome" computer to attach the VT-05 and Ethernet
> cable to. Though, in reality you only really need 8-pins for a working
> serial connection. And it is an RJ-45 cable... for which they have
> RJ-45 to DB25 and RJ-45 to DE9 connectors... so you actually could use
> the VT-05 with that cable. Again, why any one would do that is beyond
> me.
> 
> Cheers to you.
> 
> 
> On 29 June 2011 17:42, Bryan Brodie <greenkeys at vaporland.com> wrote:
> > I'm pretty sure it's some kind of joke - like i said, if you read the
> > feedback comments, most of them are hilarious. I think someone started
> > this as a rebuttal to the audiophile snootiness related to 'sound
> > quality'...
> >
> > I was joking about connecting the VT-05.
> >
> > On Wed, Jun 29, 2011 at 3:40 PM, Christian Gauger-Cosgrove
> > <captainkirk359 at gmail.com> wrote:
> >> No, no you can't use Ethernet on a VT-05. Hell you can't use an
> >> Ethernet cable on any of the DEC dumb terminals. You can however
> >> connect the VT-05, to one of those equally expensive Cray personal
> >> supercomputers (it's only the price of a car) which is connected to
> >> this cable.
> >>
> >>
> >> And, seriously? What idiot buys an Ethernet cord for 10K? If it's
> >> digital data being sent down the cable guess what? Error correction
> >> fixes any "problems" created by a "lesser" cable already. Seriously,
> >> it looks like the cable I just made five minutes ago... except someone
> >> decided to cover the cable with fabric, and added a bling-y boot to
> >> the cable end. Otherwise... it's a normal Category-5e cable. (I doubt
> >> it's Cat-6.) Also, if they're listening to MP3s? Yeah, no cable is
> >> going to fix your crap audio if you use a lossy compression format.
> >> (In internet slang: Learn to FLAC, noob.)
> >>
> >>
> >> I might like audio that isn't suck, but I'm not an audiophile. So
> >> those audiophiles that are so insane as to buy a ten thousand dollar
> >> ethernet cable are clearly amazing, especially since the cable itself
> >> probably cost a whole five dollars (if that! ...thank you China...) to
> >> make (mostly the cost due to the fact it's cloth covered and the thing
> >> has a booted cable ends).
> >>
> >>
> >>
> >> Cheers.
> >>
> >>
> >>
> >>
> >>
> >> On 29 June 2011 17:12, Bryan Brodie <greenkeys at vaporland.com> wrote:
> >>> This is the most expensive cable I've seen. it's basically a ten
> >>> thousand dollar (!) 1.5 meter ethernet cable. maybe you could use it
> >>> to connect the $250k terminal?
> >>>
> >>> http://www.amazon.com/Denon-AKDL1-Dedicated-Link-Cable/dp/B000I1X6PM
> >>>
> >>> Amazon.com Product Description
> >>> Get the purest digital audio you've ever experienced from
> >>> multi-channel DVD and CD playback through your Denon home theater
> >>> receiver with the AK-DL1 dedicated cable. Made of high-purity copper
> >>> wire, it's designed to thoroughly eliminate adverse effects from
> >>> vibration and helps stabilize the digital transmission from
> >>> occurrences of jitter and ripple. A tin-bearing copper alloy is used
> >>> for the cable's shield while the insulation is made of a fluoropolymer
> >>> material with superior heat resistance, weather resistance, and
> >>> anti-aging properties. The connector features a rounded plug lever to
> >>> prevent bending or breaking and direction marks to indicate correct
> >>> direction for connecting cable.
> >>>
> >>> Make sure you read the user comments / ratings, e.g.:
> >>> Transmission of music data at rates faster than the speed of light
> >>> seemed convenient, until I realized I was hearing the music before I
> >>> actually wanted to play it.
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