my first time I used Belden 1505f and some cheap neutrik connectors that weren't good because they didn't lock well on the pre-outs. If I re-do them, I'll use the connectors Autofile mentioned.
Edit:
This is the kind I used last time:
http://www.audiogear.com/Resources/NYS352AU.jpg
http://www.audiogear.com/cgi-bin/shopper.cgi?key=NYS352AU&preadd=action
They worked very well with the coaxial rg59 cable I bought. You only had to solder the center pin, because the inner housing would actually clamp down the shield, and it worked VERY well. You could give that sucker some tugs and nothing would happen.
The problem was the clamping of the shield of the RCA itself to the preouts of the amp/processor/headunit/etc. The OD was simply too large and the rca wouldn’t make a tight grip on the preouts. It didn’t fall off per se, but it sure didn’t grab hold like most other RCA ends. Of course, I paid about $0.60/each for those, so I got what I paid for. In a home environment it would’ve been fine but I’m not sure I’d use them again for car audio unless I was certain they wouldn’t take a couple swipes of the hand, where they would then fall off undoubtedly.
If I make my own again, I’ll just use these:
http://www.audiogear.com/Resources/NYS373-R.jpg
Which a lot of folks here already use. Autiofile actually made me a set a few months back with these and they grab hold of preouts VERY well. I’d be worried about the solder connection breaking before you were able to get the RCA’s off, lol.
FWIW, the Belden 1505f cable I used was selected from about a day’s worth of research. I read up on blue jeans cable site about their head to head testing with various cables and this particular one came in 2nd place behind (iirc) canare cable that was about 3x the cost (again, iirc). The study is here:
http://www.bluejeanscable.com/articles/humrejection.htm
Tech data (hard to find anywhere else) is here:
http://www.bluejeanscable.com/pages/technicaldocs/1505Ftech.htm
I bought the cable from here:
http://www.rawcable.com/cable/1505F.htm
Cable is very flexible and comes in many colors. I believe the total cost shipped came to be around $0.33/ft. That’s not as cheap as some of the gepco cable, but it’s not too terribly bad. I felt a little more at ease with the features the belden possessed… I could’ve been a victim of marketing. Unfortunately, I never really got the chance to test head to head the differences in the gepco and the belden. So, take the above as my $.02.