I just installed 4 Hertz 165.1 in my fairing and a pair of ST 25 horns in the gauge holes. I also have a set of lid speakers. I want to run the two sets of Hertz off my Arc Audio 125.4 and the horns and lid speakers of my Diamond Audio Micro 4. My Alpine 149 BT has three sets of rca's, can I run a 4 channel amp off 1 set of rca's? I'm not sure how to wire the 2 amps. I've read where guys say to run the 4 Hertz off one amp and run the horns separately so they can be tuned easier. Thanks in advance.