I’ll be connecting my new Ascend CBM-170 mains, CBM-170 center, and Hsu STF-2 to a Panasonic SA-XR70 receiver. Unfortunately, the receiver’s lowest crossover setting is 100Hz. Should I use the receiver’s 100Hz crossover setting and the sub-out? Or should I connect the mains through the sub, bypass the receiver's crossover, and set the sub’s crossover to 80Hz? Reading around, the first option seems to be preferred, but I’d appreciate any additional input.

Best regards,
Matt