Guys ... Here is the in room curve on the SVS PC-2000:



and the Klipsch R-115-SW:



Again, one can see the effect on the in room response with Audyssey applied.

Also ... the 3 dB down points for each sub are:

Klipsch: 16 Hz
SVS: 17 Hz
Axiom: 20 Hz

All are rounded to nearest single tone.