I don't know how many times I've heard these DIY tips recommending star quad pro audio cables (Canare or Mogami) with high quality terminations as being world beaters.
My verdict: they're OK for the money but they're no world-beaters, not even as instrument cords for guitars and basses. I got a very nice electric bass and high rez bass amp. Decided to get a Mogami Gold instrument cable to go with it. It was an improvement over the garden variety instrument cable, but a week later my local guit. shop offered me a Zaolla Silverline cable (pure silver center conductor) for about the same price ($60). The Zaolla is normally around $150.
Result? You can borrow my Mogami anytime you want. You can have the Zaolla when you pry it from my cold, dead hand. The Zaolla is far more resolving with a sweeter sound and fuller, deeper fundamentals. I suspect the Mogami Platinum series at $150/15' cable would offer a similar improvement over the Gold series.
I had a similar experience with Canare star quad cable with high quality RCAs as interconnects between preamp and high current power amp. They sounded better than white box interconnects, but they couldn't compete even with Straightwire Conductor (from 20 years ago), Kimber PBJ, Tara Labs, JPS, or any number of other interconnects I swapped in and out. They were smooth, but somewhat muddy and certainly lost a lot of detail in those three feet.
