Pro60s can handle 400 watts, but I would put that at the extreme end. Personally I think around ~325 watts is the money spot.
I only had about 230 going to mine and they sounded great though. Oh and they are 3 Ohm, fwiw.
lol..
Thanks for the advice -- hopefully these in car pics will suffice for now. I have bought from board members Blados and 01Ranger (with jagblazer01 present) but again I picked those up locally. My rep on ebay is perfect as well (same username).
I will probably have them out of the car on...
I have to put up for sale easily the best set of speakers I have ever owned. Like new condition, at most three months of use due to car trouble and having a secondary vehicle for daily driving. Were powered by a Kicker kx350.2 so they saw just about the RMS rating, but from all reports I've read...