Jarring bass from 35 to 60Hz. At least that's how it sounded to me when I heard a CV sub. Maybe yours is different. If you like the CV, it will take you a while to get used to real bass from the 800v4 - saturating, linear, transparent, that permeates your soul.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated