[medium jim]

Most of the music you mentioned doesn't really go low. They are usually produced to have a pronounced hump somewhere around (very approximate here) 80 hz.
The acoustic bass (jazz music) can go low and benefits from a external sub.

For instance, I often play Maxwell and some other more modern music and don't feel the need for a sub. When I play something by Buster Williams (jazz bassist) I really miss a sub (I have 1.7s).

Very true, try some Esperanza Spalding, Nathan East, Jaco Pastorious, Pink Floyd, Pipe Organ music to name a few for deep low reaching bass. 

Sorry, I'm beating a dead horse and I apologize.

Jim

[SteveFord]

Are any of you guys familiar with the Dead Horse Motorcycle Club in NJ?  They're a fun bunch.

Moving right along, for deep bass try PJ Harvey's "To Bring You My Love" or ELP's "Pictures At An Exhibition" - those are two good floor shakers.

Gotta run, the wife wanted to buy another recliner for herself but I took my own advice and bought a big couch, instead.  Hubba hubba, I believe is how the expression goes.