A:Answer You're confusing two separate concepts, Frequency Response (35 - 200Hz) and the subwoofer's Low-Pass Crossover Frequency (80 - 160Hz).
The speaker has been tested to reproduce sounds from 35 - 200Hz whereas the crossover controls which frequencies you're asking the subwoofer to handle vs. those you'd prefer your main speakers to handle. There are lots of great articles on how to adjust your Low-Pass filter, or often called LFE, on your subs but in general, if you set the low-pass filter crossover to 120Hz, for example, then the sub will handle ALL frequencies below 120 Hz.
If something in the 35 Hz range comes in, the subwoofer will attempt to reproduce that and according to specifications, should be able to -- although your ears may not hear something that low, that borders on the human hearing range for older adults, ha!