Incar Audio Systems

I recently installed an amp and 2 12" subwoofers into my trunk. Though after a mishap the whole enclosure came loose and slip to the back of my trunk. While doing so it pulled the power cord out of the amp. All was ok until I plugged it back in.. now the amp & speakers are only on while the key is in the off position. Everything still works considering I was able to plug a CD played into it using headphone -> rca cable. Any suggestions? My car audio knowledge is limited so any help would be appriciated.

I know next to nothing about car audio, so I’m wondering about the purpose of each piece. What is the function of a) subwoofers, and b)amplifiers ? Thanks!

I want to buy a car audio system that comes with 2 subwoofers and an amplifier and I want it to be under 400.Any suggestions on what I can get

I’m looking at completely replacing my car audio

I have an 08 Mustang, so I need to buy fron door and rear speakers, and a new deck stereo..

I already have subwoofers and a decent amplifier, what else do I need to get?

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