Are you going to use it to support your stereo speakers, or are you using it for sound effects while watching movies?
If your using it for music I'd use the line in and depending on your speakers I'd set the crossover in your pre-amp at around 100Hz, if for movies use the LFE input and again depending on what your speakers can handle and what your amp is capable of set your crossover accordingly 100Hz is a good place to start.
If your using it for music I'd use the line in and depending on your speakers I'd set the crossover in your pre-amp at around 100Hz, if for movies use the LFE input and again depending on what your speakers can handle and what your amp is capable of set your crossover accordingly 100Hz is a good place to start.