Ghosthouse - you, and a few others, may just find what I am about to write a little hard to swallow. I probably would had I not tried it :-)
Yes - I am a bit hawkish on KLE Innovations products. However, I have also been "evolving" my own design of DIY IC's, which happen to use the KLEI Absolute Harmony RCA plugs.
I've had the design of my DIY IC's available for all to see on my "System" link since I first developed/used them.
Basically - they made use of the silver conductor from a pair of silver IC's I had purchased, as the signal line, but the neutral conductor is just a twisted pair of CAT6 wires wound around the signal conductor.
Over the past year I have evolved this design by augmenting the neutral conductor from a single twisted pair to a double twisted pair and finally a triple twisted pair. Each time the changes resulted in more clarity, better imaging, better bass control, etc...
One other thing that came out of this is the fact that the "triple" IC with the three twisted pairs can also be used for SPDIF applications without any signal loss - at least up to 24/192, the max I have been able to test to.
MOVING ON: Last week a feature of the Silver Harmony RCA plug, i.e. it has a silver neutral pin but only a silver coated copper signal pin, prompted me to re-think my DIY IC design.
Perhaps using a better quality conductor for the neutral would achieve better SQ?
So once again I constructed yet another pair of IC's, but this time I purchased some Teflon insulated cryo-treated OCC copper wire for the neutral and some OCC Silver wire for the signal. but I followed the same basic construction technique.
I first tried one of the IC's as a SPDIF from the v-link192 to the Bifrost and the improvements were immediately noticeable in the dynamic performance, resolution and clarity, but the overall fidelity also improved.
Based on this performance I then constructed a half meter SPDIF simply using the OCC copper wire for both signal and neutral. The result turned out to be better than the gZero3D I was using.
The IC's with the OCC silver signal conductor and OCC Copper neutral conductor have now replaced my gZero20's from the DAC to the amp and the improved SQ has convinced me that an amp upgrade was definitely NOT required.
The DIY IC's are taking a long while to burn-in, which I also found to be the case with my previous DIY IC's. But they are sounding very nice after only 200+ hours of burn in - I estimate around 400 hours to get the best image from them. After 2-3 days they cause a drop in volume, but by day 6-7 it is restored to it's normal level.
At times like this I wish I had a cable cooker :-)
The performance of the DIY IC's as a SPDIF requires the use of KLEI Harmony RCA's - Pure Harmony for optimum performance, but the Silver Harmony will also provide very good performance .
I don't know why they work as a SPDIF, especially since the v-link states it has an impedance of 50 ohms and the DAC is 75 ohms. Maybe something to do with thei comparatively high impedance of the KLEI RCA's which is supposedly greater than 110 ohms.
Basically, it does not conform to the generally accepted "principles" of SPDIF cable design - but it works - extremely well :-)
A pair of DIY IC's cost roughly $240 CDN to build, but I would assess their performance to be somewhere between the gZero20 IC's and the new zFLOW33 IC's
The Schiit 4490 upgrade has improved the Bifrost's resolution capabilities - which I also heard with the gZero20's in place. But it was the level of improvement in SQ with the DIY IC's really surprised me.
I have one last mod to my DIY IC's which will incorporate a Silver conductor in the neutral side as well as the signal, which should take a couple more weeks to build and burn-in.
That's about it!
Strange - but true :-)
Regards...
