Use a high quality "y" (single rca male to dual female) adapter on the sub out. One feed will go to the sub, the second feed should go to an inexpensive external crossover (Paradigm X30), to the amp, then speaker wire to the transducers. The advantage of the external crossover is that you can set your transducer crossover point and volume indepent of the .1 sub. When you listen to 2 channel music you can eliminate the transducers the crossover volume control.
Don O'Brien
Don O'Brien