Beware of the cable claiming long burn in period.

My experiences with dozens of cables indicate that they tend to sound good within 24 hours of use.  This is also relative to the manufacture of the cables.  I didn't notice any difference in Monster cables from the 1980s.  GroverHuffman cables can sound good within 6 to 8 hours of use but really settle in after about a days use.  

Same problem with fuses. The SR Black fuse took 72 hours to burn in and sound acceptable in several of my systems.  The SR Blue fuse sounded excellent immediately and just got better over time.  The SR black duplex sounded good immediately and similarly just got better over time.  

I wouldn't want to purchase a cable that required 500 hours of use just as I hate it that so many speakers require 100s of hours to break in (especially those with berrillium tweeters).

Geoffkait You know I’ve been a beta tester for almost 2 decades for a cable manufacturer. I’ve tested 100s of cables, just a few dozen of his competitors HEA stuff (High Fidelity, Transparent, Nordost, Audioquest, Mogami, Magnan, Monster and Tara Labs come to mind).

Yes, good after 24 hours is if it is a good sounding cable. Horrible if it is something like High Fidelity cables. Sometimes I let my beta cables burn in for five days. If they still sound bad or wrong, I indicate that. If it turns out to be an excellent cable, it sounds "good" or excellent after 24 hours of burn-in. You just have to nit pick everything I write.

As to the Black SR fuse, I have several systems I used them with. Unfortunately, after the initial 10 to 12 hours of enjoying the significant improvement compared to stock fuses, they haphazardly sounded wrong and not musically enjoyable until the 72 hour mark. It happened on three systems. Maybe your mileage is different. I am reporting what I heard.

As to not wanting to wait 500 hours for a cable to burn-in, I am sticking to that. It’s my choice not to have to wait 3 weeks of continuous signal passing through a cable to be able to enjoy it (those High Fidelity cables had several months in my friends system).

I was at a HEA audio salon meeting and commenting on how horrible the Magnapans sounded (3.7 and 20.7). I heard the 3.7 sound excellent (another pair) there previously. What the store owner failed to tell us is that the speakers were brand new and not broken in as well as the Shunyata cabling. Yuk, what a messy sound that was. Yes, speakers require a break-in period which can be significant. Funny that sometimes they do not require more than a cartridge breakin time before they do sound excellent. It is component/speaker/cable dependent.

Geoffkait - I never said that I would endeavor to cook a cable for 500 hours.  Someone on the forum posted that it could take that long.  I thought that was ridiculous as you did.

I am satisfied with 24 hours on the cables I audition.  Sometimes I allow an IC it to stay plugged in on a full band radio station with classical and rock for 5 days, especially on cables from other manufacturers.  I don't use a cable cooker.  However, just allowing a cable to play for 6 to 8 hours often yields superior results.  For A/C cables, they get plugged into a frig for a day or two.  They also usually sound quick good after 8 hours in an audio system only.  

(The corollary is that inadequate cables don't sound good regardless of the time they spend cooking).  

I haven't changed my components for 13 years and one, 30 years (SME IV).  I have modified my preamp and amps slightly and installed an SR blue fuse.  I've also had Hallographs for 15+ years and latest Stillpoints for about 7 years.  The SR products and Perfect Path tweaks were added recently.  Only the cabling has been upgraded as I am a beta tester for a manufacturer.  I don't have SOTA equipment, but I have very musical equipment that doesn't need endless upgrading.  I am happy with them.