OMG! I was soooooo planning to buy a system this week but I did a little research on HU's and I don't think mine has any RCA preouts. Apparenly they're needed to run a amp+sub; ****ed it if it don't. It's a JVC KD-SX990. I downloaded a manual and did a quick google search and found some specs but was unable to find anything about RCA preouts! The manual did go into some detail about installing an amp, it says "connect the remote lead (blue and white stripes) to the remote lead of the other equipment to be controlled by the head unit" then " connect this unit's line out terminals to the amplifiers line in terminals". Is the line out that the manual is referring to the RCA preouts or does my HU does have any and I'm SOL.