Conrad johnson pv10b to M&K subwoofer

Caweran, you can use the tape output on the 10B but keep in
mind it is a fixed level output (as mofimadness mentioned)
so when you increase the volume of the 10B it will not
increase the volume of the sub. As mentioned above just use
Y adapters to split the signal on the 10B's outputs

By the way I too have a MK sub and love it. Made in America
it produces natural bass that is very musical.

...Sell the 10b and buy the latter Classic. Pretty much the same unit with an extra set of outputs, with some extra costs upgrade options.

Caweran-

I would certainly sell the MK and buy an REL sub. Simply, these are the best on the market. Most musical and very easy to integrate into any system. Happy Listening!