Hi, I'm currently working on a full audio system for my friends MR2 and am stuck on the amp install. He's going to be using a 4 channel amp with boston speakers at 4 ohms. The amp input has 2 pairs of RCAs or 2 pairs of line level speaker input. the RCAs are labelled low and the line level are labelled high. I believe the high level is 100 ohms and the low level is 10k ohms? which one should i use?

 

Use the RCA input (aka low level) assuming of course your running an aftermarket headunit.

the speaker level input is for those people who dont have aftermarket headunits.

this is a pretty basic amp install concept. Have you thought about taking it to the pros?