that amp gives 500x1 bridged, so u should be fine power wise.
this amp isn't a D class amp, all that means is that it will draw more current from your electrical system than a D or T class amp.
D class doesn't apply to speakers, all they care about is power.
PG amps are excellent, and have lots of great features. For $190 it sounds like a great deal
-(1) Clarion 725
-(2) Diamond M371i
-(1) Diamond MacDaddy 12" UNIQUE (long throw) in a ported box
-(1) 400w 4ch Crunch Drive Bridged
-(1) 600w 2ch Crunch Drive Bridged