Sounds about right. Alot of people drank the cool aid on these wires and spent some decent coin. Most ditched them pretty quickly. There was some success, good with "harsh" SS amps, two way full range speakers(woofer, tweeter, but no mid); but the overall usability of such a cable("heavy, thick, solid core", not too sure if it could be called "shielded" though) for a full spectrum loudspeaker typically ended up with a very pronounced midrange bump or roll off of highs or lows....however you want to look at it. It also has some goofy wire "memory" after being used in a few different "applications" because of the solid core wire, one has to be careful with sharp bends. It does OK as an interconnect, especially if you add a braided copper tube shield and some preferably clear heat shrink tubing, though I do think it is a shame to cover up a pretty cool looking cable...IMO, but if you need the shielding I will take function over form any day. I could never hear any difference with the supposed "directionality" of the cable...I dont think electrons care which way a wire "goes"....IMO. I have also striped the clear plastic/rubber "shielding" off and used the individual wires for point to point wiring in various projects from crossovers/internal speaker wiring to equipment modifications. It seems to be a very high quality copper and nice to work with. When the outer is stripped the individual conductors have their own clear insulation for those that dont know. It is easy to twist and braid when stripped too, just not too flexible and LOTS of memory...so get your braids and twists done right the first time or just start with new wire...lol.
Again, I find it very useful for passive equalization. I think they would be a good match forh my DT770/80 since they seem to lack a bit in the mids from the factory; it might help, it might not. I have never done any actual frequency response measurements, but have just gone by what I heard from my own experience: copper best for mids and lows if there is a thick enough gauge, and silver for "brightening" up the highs. Obviously the actual chemical composition of the material used in each individual type, and or brand, of wire can vary greatly, especially once you get into plated wires and other esoteric "magic" wires. Possibilities though finite, are substantial for the "wire fanatic".
Really I just saw them as my best option for what I have lying around for my first balanced cable build. I have some other vintage interconnects(Musical Concepts) that have their coating peeling off and the RCA connectors are oxidizing but the wire is still just fine; so they are also under consideration with some new heat shrink and terminations. They are coaxial wires though with only one shielded multi strand silver plated(I think) center conductor, the shield obviously is the other conductor. Not sure how "balanced" that would sound? I know that electronically they would work, especially if I sleeved them in copper braid like mentioned before for extra shielding, but I havent seen too many custom wires made with any type of coax. I will experiment with it though. I also have some incredibly flexible coax of a much smaller gauge that I might use. Finally, I do have some apparently "proper" wire coming from FleaBay(Canare L-4E6S) that was just over ten bucks shipped for ten feet, cant hurt to *try* to do things *normal* I suppose....:rolleyes: .......
So have you ever tried the wire out for yourself, or get to hear how they sounded on your brother's system? Always curious as to other peoples' perception when it comes cables, always looking to learn...