When Clark and Molly Blumenstein arrived in Eugene to set up the ORCAS+BUF SUBs in my Bottlehead Customs system, Clark used Bluejeans Cable Co. Belden 5000 10 Ga. cable in a white jacket to connect to my 2A3 amp. He did not tin the ends, but exercised considerable care to tighten the connection to the binding posts with a pair of pliers and unusual force. He said that they should be checked after awhile and re-tightened if necessary to make a great connection. Since I will not be changing speakers around in my system any time soon; this was no problem for me(who always used banana connectors previously), as these are my last speakers until Clark builds something better. I love them, and discover new things as they mature and develop a healthy relationship with my electronics and my room. All who have sat down to audition are startled at the huge stage they present, even at low volumes. And the fact that they are a bargain is not lost on my friends either. Played the Telarc/Fennel/Holst Wind Band Suites the other day, and was astonished when the kettledrum entered the room! Tactile, true rendition of real percussion. Ya hadda been there. Can't wait for the 400 hour Miracle! Photo below.... My wife declaring them "wonderful", as she listens to Dudamel leading the Simon Bolivar Orchestra in "La Mer" on the DVD "El Sistema". 36" out for perfect imaging.