Per thread title, I'm trying to understand the difference(s) between the F12 and the L12 especially any audible difference.

I have a 5.1 system with Sierra 1's, large room (5400 cu ft) that is relatively "live," mostly HT use but with some non-audiophile music listening. I had decided on an SVS 13 but the SVS rep convinced me that in my room two smaller subs such as the SB2000s would be preferable. I've been impressed with my Sierra 1's and thus decided to compare the SVS option to Rythmik.

I would appreciate any comments re the F12 and L12 and how they compare to the SB2000s.