Bryan since you mention that you have a 60Hz or 80Hz crossover choice I assume that means that you got a new receiver. If so, connect the sub as Peter suggested and select the 80Hz crossover. This is more for the VP150 and QS8s than even the M22s; they drop off below about 80-90Hz and a crossover lower than 80Hz probably wouldn't be advisable.

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Enjoy the music, not the equipment.