Warren Audio HD800 cable - aka Double-Helix cable: I had the HD800 cable on display at RMAF 8 weeks ago, with my Eddie Current ZDT amp and GE 5751 black plate tube, and everyone loved it. The cable clearly improves the detail and transparency of the HD800, and takes the HD800 another step further in approaching my electrostatic headphones in speed and transient response. I consider the HD800 to be like an HE60 with bass impact, which is a good thing. I did find that people listening at RMAF would switch the PS Audio DAC to 96K up-sampling when using the HD800, as it was not as bright, but then when they'd listen to the Woo GES/Stax O2 Mk1 they'd go back to the brighter 192K mode, so I'm not the only one.
What makes this sort of amazing is that the stock HD800 were really a disappointment for me; I thought they sounded thin, weak and artificial. Sure they were fast and the soundstage was large but they just didn't sound true to may ears. I heard them at CanJam on a couple of different very nice amps, with Larry's ZDT and a few other amps - but really couldn't understand the hype surrounding the phones or the price tag. When Larry installed the upgraded V1 Double Helix cable, I felt they improved to the point where I could see owning a pair; they were more transparent, the soundstage opened up and they retained their speed. But frankly, I had been listening to a pair of custom backloaded FE206e horns out of my ZDT and had been totally ignoring my phones - that and the price tag of the HD800 AND the V1 cable made it fairly easy to dismiss the possibility of ownership.
The V2 cable and the HD800 combo changed that, first off the price came down significantly, but more importantly the little issues I still had with the re-cabled HD800 are resolved: the HD800 grew some bass - with nice, tight impact unlike the stock version's hint at the lower registers. The soundstage always was huge but now it also sounds natural unlike the stock version - maybe the best sound staging / imaging I've heard besides an HE90 and it retains all the great qualities in a more tonally balanced and accurate (to my ears) presentation.
HD800 Double-Helix cable: 01/11/10: I received an updated HD800 Double Helix cable to replace the one that I broke when I twisted the HD800 connectors tighter (and had to repair before RMAF), even though the first cable has been working fine for the past 3.5 months. Rick's new build process cuts the cost to $299 for 2 meters and $100 for each additional meter, making it half the cost of the previous cable, despite a proprietary new insulative material. And at the same time it balances out the sound a little more so that I don't have to swap DACs, sources or tubes when I switch between my HD800 and K1000 on the ZDT amp. With the ZDT set up for the K1000, when I switch to the HD800 the sound is a little fuller or warmer with less treble emphasis than the original Double Helix, but at the same time still warmer and more detailed and transparent than the stock HD800 cable. So, now if I wanted to I could use my PS Audio DAC in 192K mode for the wider soundstage again, as it allows more flexibility in my setup.
The cable is also a little sturdier and heftier feeling than the previous cable, with a longer y-split than the original for more freedom (I think it went from about 14-15" to 23-24" by sight, and I think that you can request any length y-split you want when you order). I'll post some photos soon. The new black chrome HD800 connectors look nice and are a shiney black, and the bottom halves don't accidentally unscrew like the previous ones (which caused me to break the solder when I screwed it tighter and spun the internal connector on the first cable).
The HD800 connector has a longer grip so it's easier to handle plugs and insert them without taking the phones off your head (if doing a swap while listening and comparing), but just one time I got a partial or intermittent connection when I didn't take the phones off to change cables properly and securely. When connecting the cable with the phones in my lap, I have NOT been able repeat the issue to make the sound cut out with twisting, turning or pulling on the cable or connectors while listening, and it seems solidly made (thanks to Rick's new digital soldering station). Unlike the V1 Double Helix cable, I cannot unscrew the HD800 plug barrel on the V2 or make the wires spin and come loose inside. The new plugs may have slightly more wiggle in the HD800 socket than the stock connector, but it doesn't affect the sound at all when when played with. I was relieved to find that the longer connector on the HD800 end does NOT cause the cable to poke into my shoulder like the APS V3 cable on my HD600 does.
Overall this is a nice upgrade for the HD800 and is now even more affordable. I think it makes the HD800 sound more balanced and detailed than the stock cable. And it allows one to put in less effort to get just the right DAC, tubes and other components to pair up the HD800 with one's rig.
Blutarsky came over to listen to the eXStatA amp this weekend with his Stax Lambdas, and while he was here he tried out the newest HD800 Double Helix cable. Now, as some of you know, prior to hearing the HD800 with the original Double Helix cable Blutarsky didn't like the HD800 with stock cable, as he thought his Equinox cabled Grado HP-1000 were superior. When he first heard the HD800 with the original Double Helix cable a few weeks ago he began to seriously consider buying an HD800 for himself, as they weren't as veiled or sibilant to him as with the stock cable, and he loved the huge soundstage (we have the same EC ZDT amp to drive them, and similar sounding DACs).
I am used to a more boomy base so at first I thought the bass was not strong enough. I have to get used to the Warren Cable Bass so to speak. It might be the real bass I have never heard before.
So if looking for the ultimate improvement for your HD800 headphones, or any headphones for that matter, be sure to check out Warren Audio for all of your Headphone Cable needs.