Martin Logan 13A's with Rel subs? A match?

I am confused, am I correct in thinking the Logan 13A has room correction in their powered subs and go down to 24hz? I bet they go as low or lower than most of the rels minutes top few models. 

I would guess they would make it worse. Adding an active or passive highpass and using a really good sub would do the trick. Honestly that might not be rel. I would look at large subs (15” or more). With as low as your speakes go you will really need to highpass to avoid overlap. Then you need dynamic subs (big) to surpass what you have. Anyway, just my opinion as someone who has been using subs for 15+ years in my two channel. 

I don’t have time to write a comprehensive review at the time. Below is a pretty good video. I have/own the JTR RS1s and JL E112s mentioned in this video and I pretty much agree with what is said about them  

The JTR is more detailed and less damped sounding than the JL. It is a significantly better sub for music and also plays lower and louder at the same time.