Audioquest

Bill Low, AQ designer, has done a great job for many years at offering cables in the line that provide incremental steps up in performance.  As you move up a cable you either get better conductors or dielectric. It comes down to what your wallet can bear.  The sound just is more open and sweeter as you move up.  Bass detail and depth I've found is most affected by the dielectric, at least in their interconnects.  After A/Bing Columbia and Colorado, the difference between the two was the bass performance.  I lucked out on the half price sale on Colorados at Music Direct!! 

@corvette01   I ended up choosing Colorados over Columbia due to more realistic bass impact and depth from the Colorados.

Thanks Tim!  The PSC+ copper along with FEP tubes and the 72 volt dbs system make for a fine pair of interconnects.  Enjoy.  Phil

@skoczylas I agree that the website could explain why one series might be more appropriate to a particular system than another series!  I've never called AQ but perhaps they might be willing to discuss and clarify.  Some of their reluctance to elucidate on the site is that they are already trying to explain so many features that the length of describing each series in better detail might put people off.  

The overall stats. on how long the average reader will stay with an article are shocking short.  Too much multitasking perhaps?

I just listed an 8 foot pair of classic AQ Volcano speaker cables and an 8 foot pair of AQ Caldera here on Audiogon.