Lower extension, I would guess so from the higher xmax, but lower distortion, I don't know. The regular HS24 had a relatively small VC, and this helps to keep inductance at bay. The BHS-24 is going to have a lot more inductance and related effects due to the more massive VC. I wouldn't be surprised if if actually had more upper bass distortion. However, that is just speculation on my part, and Nick, the guy who runs Stereo Integrity, is the one who would know, so I would ask him about that.