I have 2 Type-R 12" subs which come rated at 500wattsRMS power handling. I have a PG Xenon 1200.1 amp powering the pair, @ 1 ohm. @ 1 ohm the Xenon produces close to 1400 watts RMS. Each of my Type R's recieves about 700watts RMS, and they sound very good.
I would only imagine that 1200-1400...