[s3sqguy[_7_]]

The amp will change wattage not the sub. If you have 2 4ohm coils in
your sub that handle 200w, so 100w each you could supposedly run a
100Wx2 (rms I assume?) amp on it one channel to each coil (make sure
you mono the signal). Or if you have 2 8 ohm coils you could bridge the
amp to 200x1W and parallel the two coils for 4 ohms the amp "would see"
200W into both. Most bridgable amps can run 2 ohm unbridged though, so
you could take two DVC subs with 2 4ohm coils each and run each coil
parallel for 2ohms and hook to each channel; that would make the amp
put out more than 100Wx2, maybe 150-200 into each sub at 2 ohms
depending. Many say the amp doubles power from 4 to 2 ohms but usually
its not double. Lower ohm load lets your amp run hotter and harder.

The 250w amp should work fine on 200w sub, but it is somewhat
subjective anyway. Powerhandling of a sub depends on size of box and
often quality of sub and maybe quality of amp. A larger amp should be
cleaner power/better control as long as you don't overload the sub in
which case you will blow it sooner or later. Just keep an eye on it, it
will only do what it can do.


--
s3sqguy