How deep is the expectations? Check the subwoofer specs. A BIC goes a bit deeper than the HTS 12. Subwoofer performance is also based on the design and even the placement which is very imp. In order to get the best from the subwoofer, try different places and experiment for 3 days if not a week. This way audition / try out familiar content of music and movies that you are well versed in on the lows...once you find the sweet spot, retain those settings..
Most of us didn't do a plug and play, we tried different frequencies settings on the AVR, placement etc and found the best settings that provided satisfaction. Results will not be 100% but whatever satisfies you till your next urge for change in settings, be patient and try all this.
All the best