Pure Silver Wire

Silver is a better conductor which is important when conduction is the only issue.  Now I don't recommend using a poor conductor for interconnects and speaker cables, but conduction (opposite of resistance) isn't the only concern in audio.

Silver is 7% better conductor than copper, so by making the cross section 7% bigger you get the same current carryng capability with copper.

I recently tried some very high quality silver plated copper 8 awg speaker cables, expecting them to be awesome.  they were very harsh...now many people don't realize what harsh it--harsh is when the upper frequencies are much louder than the lows and mids.  So those nice heavy speaker cables are destined to become a nice heavy power cord.

As others have mentioned, silver is often reported to be harsh in analog cables (note this does not apply to digital cables since digital signals are 1s and 0s so lows and highs are transmitted equally.  I highly recommend silver in digital cables). 

Different grain structures of copper seem to give the best performance.  

Jerry

I'll go you even cheaper.  Build your own IC's out of pure silver wires and decide for yourself if silver is worth it.   Here is a source, under $12/foot.

https://partsconnexion.com/connex-cable-bl-ag-interconnect-cable-2-x-23awg/

Clear Day solid silver "Shotgun" speaker cables sold for $500/pr in 8ft lengths, and found a receptive market. Unfortunately, CD owner/designer Paul Laudati passed away in 2019.

@piebaldpython 

Where have you been for the last 20 years? Silver speaker cables are everywhere.

I’m a musical detail freak. Darwin Cable is where I ultimately landed after years of cable upgrades, inchding Odins. Darwin’s have great sound, and the builders provide top tier service. Darwin produces a number of differently priced models. As stated repeatedly, cheap silver is just that.