Car audio question

[nevermind1281]

My friend wants to use his cars subs for his stereo.  I know a more then most people around here(my family and friends) about audio and audio setups.  But I dont have a car yet so I havnt delt with that much so I cant answer his question.  Would he just hook them up like a regular sub or would he need converters and/or amps?

 

[hotwaterwizard2]

A Speaker don't care aslong as it gets audio it makes a sound.

 

[audioguru2]

Car subwoofers can be used at home with a stereo system.
They are connected the same as in a car:
1) They need their own high power amplifier and an active crossover circuit to feed their amplifier only the very low frequencies.
2) The active crossover circuit will also have a highpass filter for the main stereo amplifiers so that they play only the mid-bass and higher frequencies.
3) Only a single subwoofer is needed but if two are used then they must be connected in phase with each other.