@clio09--- ah, but you can! Since the m/t panel and the woofer each have their own speaker cable binding post, one can simply disconnect the woofer right on it’s post. Any separate, outboard woofer may then be used in it’s place, assuming it’s response extends to 180Hz, the frequency of the crossover. And as the x/o is a simple 1st-order, a capacitor can be installed in the woofer’s power amp to provide the filtering---no electronic x/o required.