Question on integrating passive sub with Sierra 2's

[XEagleDriver]

BACKGROUND: Ordered a pair of Sierra 2's for use in a 2.1 system (passive sub) for music only use.
- The passive sub is an Optimus Pro SW 12 I refurbished and have wired between a HK3485 AVR and the L/R speakers like in the following diagram, except the depicted "in-walls" will actually be Sierra 2's and the sub is NOT an in-wall:

cx1002wiring.png

- I replaced the sub's original (lousy ~200Hz) crossover with a better Parasound CX-1002 crossover with the following specs (from Parasound):

"120 Hz low pass crossover, 12dB/octave
120 Hz high pass crossover, 12dB/octave
Oversize inductors for high power handling without distortion
Low insertion loss to prevent loss of efficiency"

QUESTION: Should I anticipate any issues with the sub's 120Hz crossover freq and 12dB/octave slope vis-a-vis the Sierra 2's low end capability? In another words, would sending frequencies below ~120Hz for the passive sub to reproduce detract from the overall bass response (Sierra 2's are spec'd down to ~45Hz).

Buying a new sub is not an option, having just bought the 2's, but other options include:
1) Not using the passive sub
2) Replace/adjust the sub's crossover to a lower frequency (such as ??)

Thanks in advance.