Maggies and subwoofer integration

I'm running a Schiit Saga+ into a B@K EX 422 Sonata, into MG-1 maggies. Wanted to add a subwoofer, and was wondering if by just using the second output on the Saga+ to the line level input of the Velodyne Sub I have, would just be adding bass heft to the MG-1's, as there's no built in crossover in the Saga+?

I would optimally want the Sub to takeover from around 60HZ, and aleviate the bass duties of the maggies.

Would it be a waste of time and no real benefit? Would running the signal from the B@K directly to the subwoofer be any different regarding the delineation of the frequency duties?

Thanks in advance for your help. 


@arnold_h the LRS would fall under the small panel category as needing a sub, no disagreement there. 

Just noticed the question my subs they are self powered 12"Sony that go down to 20 Hz that I picked up on CL for $30 each. They integrate well with my 3.7i. I run them off the RCA taps on a Pass pre with the XLR going to the amp. The key is setting the sub volume low to avoid boom and overhang.