12v car battery to power Subwoofer?

[bigblacksnake 10+ year member]

There is a fair coming up and i want to show the children the free air movement of a subwoofer 750w rms...........

i want to use 1 or two batterys in series.

problem:

how to use the battery to create an ac current, and could i add in dials for amplitude, and freq?

not really sure where to start all help is appreciated.

thanks in advance.

 

---------- Post added at 11:26 AM ---------- Previous post was at 11:26 AM ----------

 

@2-4 ohm.

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[trumpet 5,000+ posts]

Lol. Use an amplifier. Problem solved.

edit: You need a music source for the amplifier, too. They don't create signals out of nothing.

 

[Chriszle 10+ year member]

^yup and lol.

 

[bigblacksnake 10+ year member]

Well f.uck

 

[MutantDreams 10+ year member]

Why not just buy a cheap amp from walmart then return it?

 

[BrownVanMan 10+ year member]

yeah look online loacally for an amp or put a WTB and see whats out there. also dont run in series 24 volts will kill most all car audio amps. at 750 rms, depending on the amp, your pulling 60ish amps. for it to run for 2 hours you need batteries that have at least 120 Ah.

use this for your input signal to the amp 3.5mm Stereo Male to 2 RCA Male Cable 5 ft. 240-135

just use any Mp3 player

 

[09civic 5,000+ posts]

If you don't care about the sub, wall socket it.