I got one Pre-out from my head unit with rca's going to the one amp in the back.... Can I just get a Y Rca adapter to hook up the other amp too?? or will I have a voltage drop problem?
If one of your amps have a bypass rcas on the amp you could do it like that or use the rcas. If you do have a voltage drop it shouldnt be too much. One other thing you may want to look at is a 2 channel crossover. This will allow you to run one set of rcas and then a seperate set of rcas for lows and highs. This will also help you high end and low end soudn by filter out unwanted frequencies from your highs and lows. Thats what I would actually do and improve the sound some at the same time. But if you dont wanna spend the money the Y adapter will do fine.