2-channel listening with a sub-woofer

I use Martin Logan CLS 11Z and a depth sub. Three 8 inch drivers made by the same company that made the main speakers in a non HT set up in a very large room.
Try to stick to the same company for your mains and sub.Saves a lot of trial and error and mismatching, but not 100% fool proof. That's where your ears come in.

using the new tact 2.2 rcs with two subs seems like an interesting idea

I get seamless integration, but the sub and speakers are from the same company.

"have you ever heard a subwoofer for 2 channel listening" sorry but that sounds funny... people have been using subwoofers with stereo systems for 30 years or more... Dalquist, Velodyne, Janus, JBL (and others) all had subwoofer products in the 70's. The famous Beverage speakers came with a pair of subwoofers.

Xiekitchen, I'm aware they've been around a long time...I've just never heard one myself in a high end 2- channel setup...and the overwhelming majority of the 2 channel systems that I've seen posted here on the 'Gon don't run a sub.

I'm considering a purchase of a sub for my system.

Back to my original question...have you ever heard a sub in a 2-channel system? How did it sound and was the integration seamless? What type of sub and speakers were used?