The Star-8 is only for the TI, right? When will silver cables (and which models) be available again for direct drive amps?
STAR-8 6ft is universal, except for the JotR.
The objective was to make the best possible cable for our transformer headphone outputs (TI-1a/b and VM-1a), reducing the cable inductance as much as possible while retaining the desired resistance (at sensible length) for proper xfmr loading.
Coincidentally, the requirement is the same for direct-drive amps, as low resistance circuits will have higher bandwidth the lower the inductance is, so STAR-8 is great for the HSA-1b.
But, the JotR won't work it's best if the cable is lower than 0.4 Ohms, so STAR-8 6ft with it's 0.23 Ohms will not be a great match. A 10ft. STAR-8 will be needed to get to 0.4 Ohms.
STAR-8 is going to be a family of cables, in both Pure Silver and probably Pure Copper.
We are starting with headphone 6ft. Silver cable that matches all our amp/interface/headphones combinations.
The next will be also Silver for the TI Input. Those will have very similar topology, same twisting technique, same annealing cycles, but with different specs, ones that better suite the termination with 32/16 Ohms load.
After those, there will be Silver Interconnect cables, XLR and RCA.
As for the Pure Copper versions of all of the above, we want to make all those too, but we have to find enough time to see about the annealing.
This annealing for strain relief that we must do with Silver is going very nicely at low temperatures that Pure Silver requires. The influence to the sound is profound. And, it can't be overdone. There is a point where total strain relief (allowing for full recrystalization to a very soft wire) where the "magic" is lost, which is why we do short cycles and then just control the number of cycles. That gives a more consistent result than one long cycle with controlled temp and duration.
On a side note, I don't think (for now) that this change in sound happens because of some special property of crystal, monocrystal, nanocrystal or amorphous arrangement of Silver atoms, but because of cable mechanically resonating and ringing. We are passing speaker level currents through a tiny cable with very closely arranged conductors that attract and repel each other, so the cable-rope is expanding and contracting in diameter. That produces even order harmonic distortion and I thing that simply finding the right stiffness and internal dampening it the metal, prevents it from high Q mechanical ringing. We could have done the impregnation, but that creates a very stiff cable that is not comfortable to use.
Sterling Silver requires higher temp, for example, and Copper even higher...So, if that is going to be a problem with the sound of the Copper versions, I don't know yet how we could do that, as the insulation between adjescent conductors will burn. But we'll see. maybe the Copper won't need annealing at all, I don't know, as I haven't had the time to deal with that just yet.
In any case,
if the Copper version of STAR-8 works, we'll offer it, if it doesn't, we won't.
There's more work to be done, but in short, we've started with STAR-8 Pure Silver HP cable and it's available starting next week.