Hello, I bought my Rockford Fosgate RFX 9200 some time ago... I had an other cd player in the car at that moment so I was to lazy to switch it to RFX 9200. Some time later my old cd player had some problems with his laser so I decided to switch to my RFX 9200... I have a PPI 5400 amp... it has front in rear in and sub in... and on rockford i found Front Out Rear Out and SUM out... Since I'm very messy I lost the manual somewhere in my sacred home fortress and I can't figure out what does the SUM channel and function do, could someone enlighten me? Also for some reason my rockfort wants to play bass from the tweeters and that makes the sound quality realy bad... when i had my old player in everything was perfect... I hadn't misconnected the wires im sure... Im using the unamplified connections (linear). The main question is about the SUM channel,what does it do,how to use it?
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If you're talking about the amplifier's power terminals, the positive terminal is designed to be wired directly to the battery (be sure to fuse the amp power wire near the battery terminal). The negative terminal should be bolted to vehicle chassis metal for a ground connection.
The only amplifier connections that go to the back of the head unit are the remote turn-on wire and the RCA cables.