Most subs have a sensitivity around 89ish...Infinities usually are really effient meaning they do require near the amount of power to reach full potential of the subwoofer. A little over 200 watts a piece can make these things pound quite hard. That amp is fine...Don't worry about it...If your mind is made then get it and hear it.
alrighty then, am gettin everything ordered this week i hope, thanks again to all that helped me out. will prolly have some more question when i try to put this stuff in lol. till next time...... be safe everyone:yes: