[richard_v]

Is this correct:

split the sub signal from my main receiver. one run to my sub, and the other into the aux input of a second receiver, thereby sending only low freq. to the shakers wired to this receiver.

does this make sense?

[GrahamT]

Yes, this makes sense. The second receiver is receiving the same signal as the sub.

[ScottCarr]

Bass shaker wiring