The custom Neotech silver/gold alloy signal wire used in the D4 is my own OEM product! This wire outperforms the wire available to the general public. While alloy wire has been produced before, this is the only one made using the Ohno Continuous Casting (OCC) method, which produces a far superior wire to normal drawn wire.
This cable has all the positive attributes of UPOCC silver with a more realistic tone and warmth. Compared to the D3 cable it is even more accurate, precise, and neutral. There is more detail and the presentation is near perfect. It is also not as forgiving or laid back vs the D3 cable. A strong point with this cable is tone… UPOCC silver is amazingly accurate but the tone is a little on the thin side, the silver/gold alloy has a warm and amazingly realistic tone that is superior to any other wire I have used. Consider that the top end cables from WireWorld and Siltech use UPOCC silver and my cable uses the much more expensive and custom OCC silver/gold alloy signal wire, the D4 is a not only one of the best interconnect cables on the market at any price, it is an amazing value.