[quote name='Huge Hands' post='170301' date='Apr 5 2008, 03:51 PM']I would check if the cab has any passive internal electronics, such as a crossover or other filtering.
If these are being used to limit what frequencies are being sent to your driver, they may only be rated for 150W and fry before the new driver does.
If the external socket is just a straight cable onto the driver terminals, then all should be fine.[/quote]
good point, although there's no filtering or x-over in the cab.