To my knowledge there is no such thing as a USB to RCA cable.
If you feel comfortable enough you could always make your own lilliput harness with some wiring that has some shielding.
hey, does anyone know where i can get a high quality cable (usb to rca)? the one it comes with is a piece of ***** and im getting alot of electrical noise on the line especially when it draws more power from my subs. tried looking for a monster one but cant find one like that.
but i actually have one. so i know they exist, its what came with the screen, so im sure someone else would make them too.
i have seem it. it used 2 pin for RCA signal and 2 for the 12V making it on a USB. but it is not stable, and yes noisy . my new liliput 7" touchscreen use real RCA plug for RCA so it is better.