@ledoux1238, the LFT-8b contains two pair of binding posts, one for the panels, one for the bass bins. The speaker comes with a set of jumper wires between the two, to facilitate running the speaker with a single stereo amplifier (the power amp can be connected to either set, to the panel posts makes the most sense). If one wishes to bi-wire or bi-amp, that jumper may be removed. That also allows one to not connect the bass bin at all, which is what you do if using a separate woofer/sub. So the woofer doesn’t see the signal at all, but the power amp still sees all frequencies, including low frequency ones.
One of the benefits of full-on bi-amping is keeping bass frequencies (in the case of the LFT-8b, those at and below around 180Hz) out of the power amplifier, which raises the power available to the panels whilst simultaneously lowering the distortion the amplifier produces (especially advantageous with a tube amp). The LFT-8b instruction literature includes details on how to create passive 1st-order low-pass and high-pass filters (an external x/o for bi-amping), the employment of which provides those full bi-amping benefits.
If the LFT-8b is used without a separate external x/o, while the power amp will see bass frequencies, the m/t panel won't, as the speaker-level x/o is already removing low frequencies from the signal sent to the m/t drivers. It's not as complicated as a first reading of all these details may make it seem!