I concur with @audiorusty. When I had my F12s in my system, I found the sound better when I plugged the ports on my speakers, moved the speakers away from the wall, turned up the gain on the sub and turned down the cross over on the sub.
Rhythmic F12SE setup using line in
I recently purchased a preamp which has no bass management. I had been using my Marantz 7015 LFE and Audyssey MultEQ-X with a +3db/-3db tilt curve & crossover at 80Hz with my KEF R11’s & Rythmic F12SE. The bass was clear, concise & crisp.
I have followed the Rythmic instructions on line setup and cannot quite get the same results. Bass is less crisp, almost muddy.
I currently have the crossover at 50Hz, gain at 0, bandwidth & freq middle, delay/phase 10:00 (rhythmic recommendation for ported mains), volume about 1:00, nonLFE low pass 50Hz/24, rumble off, extension filter 14 hi.
Any recommendations? Thanks