Anyone familiar with the Dorian Recordings "sampler". There are several organ tracks on this disc, and one track in particular "Gnomus" (Not sure of the spelling) goes quite deep. Not sure how low these notes go, but suffice to say DEEP. Another album with serious Deep bass (of a funky variety) is Erykah Badu's "Baduizm" give the opening of "Rim shot" a listen. Most speakers won't handle it. Lastly, Shefield Labs "Heart beat drummers of Japan" can put out some bass with serious size to it. This bass isn't so much deep as it is increadbily large - also a good test.
Speaker punishing bass
I was wondering if anybody had suggestions for quality recordings with frightening bass. I use several discs for auditioning speakers to see if they can stand up without distorting. My favorites are: Vic Wooten with the Flecktones, Marcus Miller, Copland's "Fanfare for a Common Man", Edgar Meyer's "Uncommon Ritual" and "Passage" by the Empire Brass Quintet. While bass isn't the last word it has made short work of some speaker choices. As always I look forward to any suggestions.