Need A Amp

[blandy]

hi i just bougt this sub
Rockford Fosgate® - P312D2
i am going to wire the sub in at 4 ohm as its dual 2 ohm but would i have to get a amp that does 500wrms at 4 ohm or would it need to be 1000wrms at 4 ohm as its dual 2 ohm??
Thanks

 

[cannondale99]

Looking at the info on the sub, it's 1000w max....ignore these ratings.

It's dual 2 ohm, so you're correct, wiring both voice coils in series will make your amplifier produce power at 4 ohms. Wiring in parallel will make your amplifier produce power at 1 ohm.

What are you using this subwoofer for? High volumes, sound quality? Anything with around 500w rms on tap at 4 ohms will be fine.....

Is this for the car, or are you building a sub for the home?

EDIT. If you're not sure how to wire in series, here's a diagram for you:

http://www.rockfordfosgate.com/rfte..._search_type=series&woofer_qty=1&woofer_imp=1

Gone were the days I used to run Resonant Engineering XXX-15 subs and DLS A6 monoblock amplifiers in the car. Two batteries, 0 guage cable, I think the MDF and subs weighed more than the little old Astra they were installed into.

 

[blandy]

so a amp at 500wrms at either 4ohm or 1ohm will be ok?? and i wont a mix realy between sq and volume. and it will be for my car.
Thanks

 

[cannondale99]

so a amp at 500wrms at either 4ohm or 1ohm will be ok?? and i wont a mix realy between sq and volume. and it will be for my car.
Thanks

Correct

 

[blandy]

one more question is it better to have a amp that runs at 500wrms at 1ohm or one that runs at 500wrms 4ohm?
just wondering if there is a performance difference?
Thanks

 

[cannondale99]

No performance difference really, more so for sub bass applications than full range. Obviously, you have to check that the amp is capable of running at 1 ohm in the first place.

If I had the choice, though, I would try and find something to run at 4 ohm.....there's less worry of things overheating....the boot was never a great place to store amplifiers in the first place.