Where are the subs?

In listening to the Bach Toccata and Fugue BMV 565, I was struck by how well the organ pedal notes are reproduced since I moved my primary setup to another room. I complemented myself on a fine job of integrating the Velodyne HGS-10 subs with the KEF Ref 1s, using 40 Hz low-pass with 24 dB/octave. But as I thought about it, I didn’t recall connecting the SMS-1 bass manager to the Ayre KX-5 Twenty preamp. I checked. The subs were not connected. The Ref 1s alone where reproducing that satisfying bass. Amazing for stand mounted monitors. I sure as hell didn’t expect that. To confirm, I played the Saint-Seans 3rd Symphony. Same result. Makes me wonder if I need bother connecting the subs.