The following is from a review of a Cable in both Speaker and Interconnect I have heard in use.
The first time I was to encounter the Speaker Cable was at a Speaker Cable Bake Off in a System costing approx' £40K+ using EAR Valve Amp's and Quad ESL Speakers with very worthy sources in both Analogue and Digital.
Speaker Cables were costing up to £1500 a Pair.
The True Silver Speaker Cables showed themselves as exceptional over other Silver Wired Cables and those in Copper.
The Info below is to encourage a sleuth to find who is the US Producer of the Wire supplied to TSA?
" How to differentiate yourself in a market that’s crammed with apparently similar products? That’s the question that every cable maker has to answer if they are to succeed and one that TSA or True Signal Audio have failed to do with their choice of the brand name. TSA does, however, have an angle that is new to me at least, which is that it is owned by a larger (albeit unnamed) American company that produces cables for medical, military and aerospace industries.
The benefit that being part of a larger organisation brings is that the cables are made from the ground up, literally extruded from the bare metal, to create material combinations and topologies that are precisely what TSA requires. This is quite rare within the audio industry, where the majority buy from industrial manufacturers and have to commit to miles of the stuff in order to get the design desired, many use what’s available off the reel and work around it to achieve the end result. "