Originally Posted by whoaru99
Well, actually, there seems to be a fair amount of RG-59 that has copper-plated steel conductor from what I see on the Belden site. So, the point is that just selecting RG-59 seems not to guarantee solid copper conductor.
I've noticed the same thing when shopping for bulk cable. There's some solid copper RG-6 and there's some copper clad steel RG-59. It's a minority in either case, but they're definitely in the product mix. Except for the fact that this might confuse one of my employees someday, I'm glad that they're available.
Originally Posted by whoaru99
Anyway, does it REALLY matter whether it's copper-plated steel or solid copper? Sure, given the choice, solid copper offers about lower resistance even though both values are fairly small such as ~1 ohm vs. ~2.5 ohm over 100ft, but again, does it REALLY matter?
What would support there being a significant (read clearly noticeable) difference in the resultant sound - especially considering a subwoofer setup?
This is a stretch, but I'm hoping that this thread comes up with a scientific answer to this one. It's way outside my area of expertise, but I'll throw out an idea in case somebody wants to confirm it or prove it wrong: what if using one material vs. another changes the amplification levels at different parts of the frequency range? Since copper clad steel was selected for it's ability to carry higher frequency signals (broadband internet, digital cable, etc) (and again here, I'm going on hearsay), perhaps it carries lower resistance in this range. Copper, however, is what most unbalanced, line level audio signals were engineered for. Thus, the person mixing down your music would have tuned his EQ for the characteristics of the copper, which (again, I'm reaching here) supposedly hit high attenuation in high frequency ranges.
So, if my hypothesis holds true, then using steel to transmit line level audio would be similar to inserting an equalizer and increasing the gain on high frequencies and decreasing the gain on low frequencies.
They put copper around the steel in "copper clad steel" for a reason, though. Most people expect that cable coming out of the wall to still perform on the lower numbered cable channels, which are in the baseband range. One could suppose that it would also help the signal for line level audio.
In the case that the OP is asking about, none of this matters. It's all low frequency at a low current. Probably won't be affected by any of what I'm suggesting here.
Also, keep in mind that this is hypothesis. I'm only a custom installer who's trying to know "the right answer" instead of just going on hearsay. Hopefully, this thread will conclude with other people chipping in a scientific answer.
Or, as I'm often learning, there is another thread somewhere on AVS Forum that already answers the question. Maybe someone else knows where it is.
Looking forward to your replies, if anyone's game for getting to the bottom of this. Thanks in advance.