My 300 watts is the 5th channel of a hifonics amp (forgot model number), but it is 300 watts at 2ohms.
I don't think a type R would move much with 300 watts. They are what, 750 rms?
I figured the comps are 250rms each, so 150 watts each should get them moving...their Xmas is 11.53mm (not bad...