This is interesting.
Your speakers cross to the midrange at 500 Hz. This means your woofers carry a significant amount of midrange. Middle C is 254 Hz. Removing the bass below 100 Hz will definitely lower distortion noticeably in the midrange.
My speakers cross over at 270. I can't change that on my speaker (MUCH lower price). Much of the vocal range is under 500 Hz. I did not consider that it would be reproduced with a woofer.
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781119164746.app2