AZ Double Barrel and Purist


I plan to upgrade my bi-wire speaker cables and would like to have your opinions and recommendation on AZ Double Barrel and Purist(please specify purist models).
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What Speakers and Amp are you using?
AZ Double Barrel and Purist 20th Anniversary Aqueous.
Other cable that would be in the same category is the Kimber Bi-Focal XL.