Awesome. Thank you for the information. I will try that and post my results. Your explanations are clear and make sense. I will do this in the next day or so.

I meant engine ground to chassis, alternator positive to battery positive (this is where I get confused because it really doesn't run to battery in this car), and battery negative to chassis. Oh so I always reconnect with key in ignition to position II. I thought it had to be completely off. Thanks ...

Thank you for responding. I used 4 AWG OFC cable for my amp install and have it fused right next to battery.I went through the manual and found nothing on watts usage, but I tuned it with a voltmeter to about 30v at 2ohms pushing around 500w to the sub. The local stereo guys suggested I beef up the ...

Hello everyone. I am a new Volvo owner and new to the forum. Just picked up a pristine 1999 S80 2.9 non turbo. I love it. Great car. I am looking for some guidance. Seems like this is the best place to start. I just installed a JL Audio J2 500.1 running a Rockford Fosgate HE2 DVC 10" in a SubZe...