Hey all, I used to be really into car audio, when I was in high school and then started to lose interest in college. Now, I have a new car though and I would like to beef up the system just a bit. I have a 2002 Mazda Protege 5 and I want to add a sub and an amp, but leave everything else stock. So I know I will have to use a high level to low level converter to connect the sub amp, but I heard on a Protege-specific forum that some people have had mixed luck blending a sub in. One guy said he had the gain on the sub amp all the way down and it was still way louder than the speakers (but who knows what kind of line level converter he was using and what the input voltage to the amp was). I didnt ask how he did the high to low level conversion. I know my 4 channel amp (one that I'm not using in this install, I'm using a two channel amp instead) came with a little wiring deal that you tied into your speakers and then it clipped into a special plug on the amp (not the RCA jacks) but since the two channel amp doesnt have one of these, I am going to purchase a dedicated line level converter. I am just asking for people to tell me if they have done this, did it work, how did they do the hook-up, will there be a way to lower the incoming voltage etc?