Per the below, depending on your room measurements you most certainly want the crossover considerably lower than 120Hz
http://www.stereotimes.com/speak091204.shtml“The bass of the RM30 was very strong and punchy right out of the box; however, it rolled off just below 40Hz in my room after some initial positioning. I began with the side-firing woofers facing inward and later changed them to face outward, which I didn’t think made a huge difference. After a couple of weeks of positioning, playing the speakers, and removing a bit of Mortite from the front passive radiators (PRs) of each speaker, I did measure fairly flat response to 31.5Hz in my room. So the bass is quite robust and extends fairly deep. For my taste, I could take or leave a good subwoofer. Those that insist upon strong output in the bottom octave will require a good dedicated subwoofer system. The response does roll steeply after 31.5Hz and was down at least 10dB at 25Hz. I achieved these figures with the front plane of the speakers about 37 inches from the front wall.”