power loss

All, I am new to this forum and wanted some advice on how to hook up a second battery as I have been told I have a lack of power. My system is a Orion hcca 12.4 powered by Orion D5000 amp, Focal and Hifonics doors speakers powered by Pioneer GM-D8604 amp, LC2i for bass roll of as it's a stock...

I've had a kicker zx750.1 laying around for a few years that I had forgotten about since it didn't seem to be functioning properly the last time it was in use. The problem that I had with it was the fact that it seemed as if all of a sudden it was providing dramatically less power than it had...

I have been using a borrowed Kicker KX400.1 amplifier on my 10" Audiobahn 1000N fully sealed subwoofer and it sounds amazing so I finally got enough to get my own amplifier and got a Boss PH1500M Phantom and it sounds like garbage comparatively. I'm not getting the same level of power or range...

Hello guys, brand new to the forums. I'm not very pro with all the audio stuff so excuse me a bit Here's my set up, 2008 Honda Accord LX, 2x JL Audio 12'' W6v2 subwoofers, a Kenwood KAC-X1R Amp (1 ohm stable i believe), a 1 farad capacitor, a Kenwood Deck, and the proper gauge wiring...