Doug,
First caveat, I couldn't find output data for the JL110, only the JL113 (available at HTshack.com subwoofer test archives).
The 113 will reproduce 20hz at 95db (quasi-anechoic) with 10% THD, which means that it probably provides more than enough clean output for a room your size for music or movies (unless you require lower distortion for your tastes or you listen/watch very loud). The Audyssey will provide smooth response, meaning that you don't need a second sub to achieve that. In short, a single 113 in your room with Audyssey will probably be very, very good. The only reason you might want a second sub would be if you cross over high enough to require stereo subwoofers to maintain imaging and directionality.
The question is: How far short of the 113 does the 110 fall? Don't know the answer to that one. Maybe someone else has seen data for the 110.
Marty
First caveat, I couldn't find output data for the JL110, only the JL113 (available at HTshack.com subwoofer test archives).
The 113 will reproduce 20hz at 95db (quasi-anechoic) with 10% THD, which means that it probably provides more than enough clean output for a room your size for music or movies (unless you require lower distortion for your tastes or you listen/watch very loud). The Audyssey will provide smooth response, meaning that you don't need a second sub to achieve that. In short, a single 113 in your room with Audyssey will probably be very, very good. The only reason you might want a second sub would be if you cross over high enough to require stereo subwoofers to maintain imaging and directionality.
The question is: How far short of the 113 does the 110 fall? Don't know the answer to that one. Maybe someone else has seen data for the 110.
Marty