If there is a difference in sound with using higher end cables over bulk, it's not enough that the average person is going to notice the difference. I bought the expensive amps, speakers, deck, and subs because they are the brands I like. They have sound quality and volume over anything else I have ever heard. As far as the cables I bought, they were a total of about $10 more than bulk stuff for me so why not? Even as an audiophile I have never noticed any real difference over using the $100 monster cables or $100 rockford dual twist over the Rockford bulk RCA's that I used to install.