Stereo & Electronics - Monsoon amp x-over points?

Does anyone know the lowpass crossover frequency on the factory monsoon amp on the channels that run the 6.5" factory "subs"?
I'm tracking down some alternate replacments for the factory speakers and need this x-over frequency.

well...the best I can tell with a test tone CD the factory "sub" is low passed at 250-300hz.

Someone has to know this for sure though?

After a little more testing today it seems that the sail panel speaker (can't really call it a sub anymore) is crossed over around 700hz or so, but then really attenuates at 1khz.
It's definitely more of a midrange/midbass speaker than a subwoofer.
Just MHO.