I recently bought 4 15" Rockford Fosgate T2D215's.
1200 Watts rms each
2400 Watts Peak each
All of them at 2 oms

Any idea what amps I should use to power these?

 

Wow, that's a TON of bass. You'll be better off running multiple amps, you'll need something 1 or even half ohm capable. Hifonics makes good amps, I've been looking into those. I'd avoid anything cheap, they may claim to be 1 or half ohm stable, but odds are, they're not.

Got any pics of your woofers?

 

Haha ya. I'm not to good with audio yet. But each of the Woofers were about 420 each so don't wanna go cheap on the amps aha. So I should look into Hifonics?

 

If you're wanting to stay away from "CHEAP" amps, you may still want to consider bypassing Hifonics as well. While they are fairly reliable and inexpensive they don't quite make full power unless the electrical in your vehicle is giving them a solid 14v, which is VERY rare on even the most beefed up electrical systems. With 4 D2 subs your ultimate wiring choices will be all 4 at 1 ohm or .25 (which wont work), or a pair at a time at 2 ohms or .5 ohm (which is VERY hard on amps and electrical). You'll need about 3k of power to get things running good, 4k would really pound and 5k would be absolutely killer. Any amp that can truly deliver that kind of power will be expensive. Hifonics' XXV series amps will do well, but even at their price points there are other choices. You can find plenty of used or refurbished Sundown amps that are GREAT power houses. Crescendo Audio makes a 3k that can be had brand new for $550 and delivers 3.3kW at 1 ohm, which honestly would make them get plenty loud. There's so many choices out there for power, it's really only limited by your budget.

 

Well my budgets quite high. I don't really care about pricing just something powerful enough to power the "beasts" lol

 

If that's truly the case, look into the Sundown SAZ-4500. VERY solid performing amp from a quite reputable company. Get yourself a DC Power Inc. HO alt and a good bank of batteries and you'll be set. Then once you're tired of the Rockford's you can look into getting Fi BTL's, DC Level 5's, Incriminator Audio Death Row's or Warden's, SSA XCON's, the possibilities are great with the combinations of those subs with that amp.