I just installed the JL 450 / 4. I'm getting 12 volts to the amp is on. I had all my speaker wires disconnected and I put a voltmeter with pink noise on at three-quarter volume and I'm getting a very low reading on each Channel. I just disconnected another amp and everything was working. Either this is a bad amp or there's too many settings and I have something wrong. With the gains all the way low I'm getting a little bit of sound out of my tweeters and my wipers are not working any ideas? Can someone stick around for 10 minutes who has experience with the amplifier I'm going to be here waiting and seeing if I can figure this out thanks