Im looking at a few new subs and amps for the xb to replace my infinity RF10211A http://www.infinitysystems.com/caraudio/product.aspx?ProdId='REF1211A'&Ser=REF&Cat=AMP
and 2 12' polkdb212's http://www.polkaudio.com/caraudio/products/db212/

I looked at a Rockford Fosgate T15002
http://www.rockfordfosgate.com/products/product_details.asp?cat_id=2&series_id=7&family_id=23&item_id=95245&locale=en_US

and a single rockford fosgate sub
http://www.rockfordfosgate.com/products/product_details.asp?cat_id=4&series_id=32&family_id=13&item_id=91849&locale=en_US

The fosgate amp is a class A amp and my infinity I had was a Class D. I know the fosgate is a better amp but do I need to do anything to my car to help with the amount of power it will need? I wanted a class D so it's not so draining on the car but if a class A isnt going to be that different then I will just get that.

If you know a different amp and sub that you think would be better feel free to let me know! Thanks for the help

give tom a call at listen up car audio. 602 485 8855
he will be able to help you in making the right choices.

Thanks, Tom was off today but the guy I talked to told me that fosgate used to be great but they've slipped along way down the line performance wise and that I should either stick with the infinity or get some memphis equipment.

Thats prolly cause they sell Infiniti and Memphis. I wouldnt say RockFord Slipped at all!! J's stereo is awesome sounding. Talk to Big J about Rockford since he works there and is apart of the group here.

you really need some unbiased suggestions. i would say go with rockford though.