Pet Sounds-Full range and subwoofers only

I just played this album on vinyl today for the first time in a while and was astonished to hear the track "Let's Go Away For Awhile" (2nd last on 1st side).
This is instrumental only and with my 2 Vandersteen 2Wq subwoofers, I could swear that the bass response plunges cleanly to 27Hz or even 25Hz?
Has anyone else noticed this impressive feat?...as no other track on the same album seems to come close?