I can only get sound out of 2 speakers with a 4 channel amp

Steven Pfarr

CarAudio.com Newbie
I just finished installing a 4 channel amp into my car and I can only get 2 channels to work. I have a skar audio RP-75.4AB 500w amp, and a pioneer s322bt head unit. In addition to that i have a 2 channel amp running a sub. I have been using the head unit to power the 4 door speakers but it did not have the power necessary to do so. It has 2 sets of rcas one for the sub and a second I ran back to the skar amp and split it to hook up to the 4 channels. after doing so the amp would play out of to speakers no matter what configuration i moved the rca inputs to, sometimes it only played out of 1 speaker. The rca output on the head unit is for full range front speakers is that the problem am I not able to split it to run both front and back speakers?
 

2RZ-FE

Senior VIP Member
10+ year member
Put the RCA’s on channel 1 or A whatever it’s labeled I’m too lazy to look and is there a switch to go from two channels to four channel mode?

Don’t daisy chain speakers like that
 
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Steven Pfarr

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