I have an Infinity 12.1d subwoofer.
2 coil, rated at 350 rms watts at 4 ohms.

Do I look for an amp that is exactly 350 rms at 4 ohms ? What happens if I use a 250 or a 500?

Thanks for any help

is your sub a duel voice coil.

if it is your going to need an amp that makes its most power @ 2 or 8 ohms.
i would look for a mono amp that makes its most power at 2 ohms.

also look for an amp that puts out a bit more power than what the sub is rated for.i would look for somtheing that puts out between 350-400 watts

Look for any amp that puts out ~500 watts rms at 2 ohms. Wire the coils in parallel.

Yes, my sub is a dual voice coil but says it runs at 4 ohms.
What do I look for the amp to run at 2 ohms?at 4ohms?

Sorry for being a bother.

Thanks

Each coil is probably 4 ohms.
When wired in parallel the resistance would be 2 ohm, and 8 ohms in series.
Ideally, you'd want an amp that puts out around 350rms @2ohms.

12" subwoofer with dual 4-ohm voice coils

aluminum cone with high-roll butyl-rubber surround

massive cast-aluminum basket

dual 4-ohm voice coils

power range: 75-350 watts RMS (175 watts per coil)

peak power handling: 1,400 watts

frequency response: 18-200 Hzsensitivity: 96 dB

top mount depth: 6-1/8"

Yes, each coil is rated at 4 ohms.
To run the sub properly, you have to hook both coils to the amplifier.
There are 2 ways to do this
1. Parallel
2. Series
If you wired them in parallel it would make 2 ohms
If you wired them in series, it would make 8 ohms.
Logically the lower the resistance, the more power.
So you would want a 2 ohm stable amplifier that could produce around 350 watts rms @ 2 ohms.
Got it?

Here:

http://www.crutchfieldadvisor.com/IS...rs_wiring.html

another good site:

http://www.the12volt.com/

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