I don't think the specification is the whole story. 38 Hz is fine for a -3dB point but it is the rest of the frequency response that determines the balance.
WIlson's, Focal's and others have a bass bump (which is quite musical) in the bass, and everything else is below that. These B&Ws are curious in that the mid and treble are above the bass, making these speakers curiously lean, unless they are going to be used with a sub. These choices may have been done to improve the sensitivity.
Take a look at the first chart here:
https://www.soundandvision.com/content/bw-cm-series-surround-speaker-system-measurements
Placement matters, of course, so close to a wall these speakers may greatly improve. Definitely not speakers to leave far from the walls.
Best,
Erik