In this context, I was thinking specifically of the 520 model.
Since it is an all-in-one unit—and assuming one uses it as intended—the only cables I currently need are a couple of RCA audio cables (in my case) for the pre-outs (specifically for subwoofers). We’ve already discussed speaker cables.
Apart from that, I once bought a power cable—one of those special “eclipse edition” types—but I couldn’t detect any “audible” differences whatsoever, so I sent it back. The simple fact is that swapping cables takes too long, and the human “mind” is notoriously bad at retaining a precise memory of sound quality over time.
Even when using the exact same cable, different musical tracks—or music in general—vary so much that your “brain” simply doesn’t manage to store a consistent reference point.
Furthermore, perception is heavily influenced by your physical state and the time of day:
Did you sleep poorly? Have you been fueling yourself with nothing but processed junk food? Or perhaps you’ve spent a long time in a noisy environment (like at work)? (Oh—wait, that last one probably doesn’t apply to you, seeing as you just sit at a desk at home.) In such states, the sound will seem completely different compared to when you first wake up in the morning, feeling physically refreshed and regenerated.
Try this experiment:
Spend two hours cutting firewood with a chainsaw while wearing headphones!
You’ll notice that the music sounds muffled—or perhaps overly bright—and seems to lack bass. This is a side effect of the hearing protection; the ear defenders exert pressure on your ears, effectively sealing off the ear canals due to that external compression.
Maybe I’m just an alien, but I notice this phenomenon every single day—whether I’ve slept poorly or have spent a long period in a noisy environment (even while wearing hearing protection).
In that regard, we all made a mistake during our youth. Sure, we were young and wanted to experience everything—to see and hear it all—but all those nights spent at discos and concerts actually caused damage to our hearing back then.
So, it seems you are clearly a true believer—even if it turns out to be nothing more than a placebo effect.
Well, good luck with the cable hunt then—but start with the 2k range; anything below that just isn’t worth it at all.
Cheers!