I just got a new speaker system that has both a single auxiliary cable output and a white+red composite cable. Does one get better sound than the other? If so, are certain brands of cables better than other? For example... Will my 5 dollar composite cable work just as well as everything else? Thank you!
The 3.5mm auxiliary cable is a TRS, tip-ring-sleeve connector, which provides stereo in\output- RCA connecters are stereo as well. You won't notice any difference in sound quality between the two. The 3.5mm cables are on the whole cheaper. You could even get a Y-cable, with RCA on one end and a 3.5 connector on the other. Stereo makers usually are nice and provide multiple-out standards.
Your 5 dollar cable will perform perfectly