Sub based on amp ohms.. 2 ohm or 4 ohm

[hawk45 10+ year member]

If my amp runs at 310w RMS 4 ohm and 500w RMS 2 ohm....then should I get the 2 ohm version of the 05 Alpine R? Will be in a 1.75 cubic foot box and want good lows and SQ.

Hawk

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[azbass 5,000+ posts]

yes you want the type R to run at 2 ohms.

 

[zachzchw 5,000+ posts]

If my amp runs at 310w RMS 4 ohm and 500w RMS 2 ohm....then should I get the 2 ohm version of the 05 Alpine R? Will be in a 1.75 cubic foot box and want good lows and SQ.
Hawk

Are you asking about single coil or dual coil subs? IIRC, the type r only comes in dual coils.

 

[9512ds 5,000+ posts]

yes they only come in dvc so you would want the dual 4

 

[hawk45 10+ year member]

Ok now I am confused... the Alpine comes in a 2ohm and 4ohm design... and both are dual coil...

So if my amp runs more power at 2ohms why would I want the 4ohm model?

 

[Alpine2005 10+ year member]

if your amp is pushing out 500rms x 1 @2ohms. you'll need the 05 dvc 4ohm version model # SWR-1242D CHICK HERE see Option #1

if your amp is pushing out 310rms x 1 @4ohms. you'll need the 04 dvc 2ohm version model # SWR-1221D CHICK HERE see Option #2

 

[zachzchw 5,000+ posts]

Ok now I am confused... the Alpine comes in a 2ohm and 4ohm design... and both are dual coil...
So if my amp runs more power at 2ohms why would I want the 4ohm model?

Because you will have TWO four ohm coils. Check the wiring tutorial on this forum, to learn the different ohm loads and wiring methods.