Sorry we didn't specifically talk about your bass amp. Don't use the Bass amp, and in particular don't use the subharmonic processor. The Bass amp is actually a full range amplifier in most cases-not sure about yours. You will spend more making a usable crossover for it, where it's not really intended to be used as such, than picking up one of the 10 or so powered subwoofers (more compact and easier to corner load) on Craigslist.

Speaker size is not everything when it comes to subwoofers. Because of their special purpose for low frequency generation, you can use smaller drivers in a number of different configurations to generate the low frequency grunt.

You would have to cross-over the thing in between the pre-amp section and the amp section, or wire in a cross-over on the main amp output, putting load resistors on the 'throwaway' frequency region. The amp will be working to supply the load resistors unnecessarily. Not only that, you'll have to wire up your signal to supply both your monitors as well as the sub channel - not sure if you have that capability or not.

Just go with a powered sub that has the crossover in it already, connect the monitors to the crossover output as intended, load the little thing in the corner and be done with it. I would try to find one where you can adjust the crossover frequency, so that you can take advantage of the output of the monitors' low end. If I read right, your monitors have 8.75" drivers and are capable of plenty of low end grunt, cross over too low and you'll lose overall punch in the system.

-Scott

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