I've just gone through some cable upgrades, and selling off what I don't need.
Original owner, I was using these as the long link between my preamp and power amp. AudioQuest's Reference copper interconnect, many listeners (including me) will prefer these to Niagara. These are extremely open and clear with some of the best soundstaging in the business, most remarkable for a consistent rendering of depth in recordings, whether real or artificial. This resolution of space equates with resolution of extremely low-level detail that most mid-level systems simply will not resolve. The 72V DBS system is an upgrade over the older lower-voltage models. (I previously owned Cheetah with the original 12V DBS packs.) This is by far the best bang-for-the-buck in AQ's line, and a true reference-grade product.
"The Colorado offers substantially greater low-level definition and clarity. The core of this improvement lies in added detail at all levels, revealing very-low-level musical sounds. This new generation does, however, provide a level of musically natural detail that is truly exceptional. I'm using them as one of my key references."
– Anthony Cordesman, The Absolute Sound
Please see my other listings for 0.5-meter and 1-meter RCA pairs.
My price includes insured shipping and PayPal in the 48 contiguous states.