Larry,without getting too nuts,regarding a pricey aftermarket interconnect for the REL/neutric connection lead,I ordered,from "The Cable CO",an XLO dedicated sub cable(to replace the stock unit).They had a deal going,as they had XLO make these specifically for REL units.I only paid 196 bucks,and the 15 ft cable looks to be of a much more costly persuasion.Simply amazing construction,for the money.Now,as to the sound,as compared to the stock cable.CLEARLY better defined and deeper bass.I'm not going to jump through hoops and go overboard here,but the difference is clearly superior to the stock.At the price I paid it was a no brainer.There are other companies selling much pricier dedicated woof cables,but the XLO's construction,and sound has closed the door for me.If you want to check it out,Cable CO has a free audition policy,where you pay shipping,only.Their phone # is 1-800-fat-wyre.PS--I,also replaced the stock PC with a PS AUDIO PLUS cord(1 meter).I got it for 160 bucks.Not as dramatic as the interconnest,but definitely better than the stock.
Best regards.
Best regards.