You need an active external crossover between your preamp and your sub amp. There are 3 sets of outputs on your preamp use the 2nd L & R output to feed the crossover.
david
david
How can I drive a very large passive subwoofer?
My system is comprised of a Mac C-28 preamp, and a Mac 2200 power amp. As you guys know their is no subwoofer out on the preamp. I did buy a nice Emotiva mono amp to hopefully use to drive the sub. I just don't know what to use as an input into the mono amp. Theirs also the issue of feeding only low frequencies into the sub...........Can anyone help me.......HELP!!!!!!!!! Gene