Perhaps we can say, the famous Ga-Ku-On amplifier,as made by Mr. Kondo San of Japan, has started the interest in silver wound transformers. Often I am asked by phone or email what is difference in sound between silver wound transformers, and copper wound transformers, and if the price difference pays off. Of course this is not easy to answer. Resistance of silver is slightly lower than copper, and also the crystalline structure of silver is another. Better, because of larger size crystals with silver. My be this is responsible for the better sound of silver would transformers. What is sure, the customers who went for those, each and every one, was very satisfied. These users all report relatively long burn in time of those, they say it takes several months for the final sound to develop. This indicates to me, we need to look for the explanation in the field of crystal structure probably indeed. This makes sense for the long burn in time, and also we have here the main difference between copper and silver.
Example: Silver wound, Amorphous Core, Moving Coil transformer.
Example: LL1660-Ag-Am-10mA. A silver wound interstage transformer, amorphous core. Based on the famous LL1660 windings formula, the most popular interstage in the DIY market. Also many OEM use LL1660 because it is extremely versatile, and it works always perfectly as expected, without complications. There are many applications for 'reversed' use as well, also in the official data sheet. (Like a step up application, just reverse it, and you get a step down application). Voltage capability is amazingly high, and distortion is neglectable at normal signals for interstage applications. Of course LL1660 is also available with an electro static shield (S-Version) or Push Pull (PP-Version) or Parafeed (PPZ-Version). Any normal combination can be ordered. So if you want an Amorphous core, Parafeed, Statically Shielded, Silver Wound, LL1660.... just order it :)