Any cables that give more bass

Low organ (or piano) notes yes but bass is still within speaker's response (lowest bass note E=44Hz). Analysis Plus Oval 9 are a little bass heavy. Moving speakers and listening position toward opposite walls will help as well.

Casouza - 31Hz is only on five string acoustic bass. I don't know how common they are in orchestral music but not very common in Jazz. It is often used in rock music (5 and 6 string bass guitar) but not for the purpose of the lowest note B=31Hz but for the ease of playing (same for the 6th string). The A=27.5 Hz on the piano i seldom used - just listen to recordings. I am not familiar with Oscar Peterson's piano but just cannot understand why they put non audible (16Hz) string on the instrument. 40Hz should cover at least 90% of music and I would rather go for bass performance than extension.

I'm not a musician but I'm just guessing that most of music is written for common instruments and would be difficult to find jazz composition that requires 5 string acoustic bass.
Isn't acoustic bass in orchestra a 4 string instrument? Any musicians here?

Casouza - I agree, some musicians use lowest notes frequently but speaker limited to 40Hz will still play them, only softer (compromise). There are closed speakers with fairly good bass performance and definition.

My non-audiophile friends believe that extension is the most important quality of the speaker. I explain that I get extension from my room amplifying 30Hz and the speaker's port tuned to 30Hz is a not good thing giving me unnecessary energy at 30Hz and +6dB hump lasting thru multiple frequencies 60Hz and 90Hz. Since one of the bass speakers covers the midrange (2.5 way) it makes midrange a little muddy. I also suspect that port affects proper summing of harmonics (group delays) and the tone of instruments. Not only Tone but also other qualities of acoustic bass - Presence, Projection, Sustain, Separation - much more complex than just extension.

I don't have anything against good bass extension but not at any cost. It make me think when I see review of ten times more expensive speaker than mine of the same physical size that has worst extension. I would probably settle in future for less extension and better coherence and imaging.

As for music taste - I listen to pretty much the same: Jazz, Classical (including Indian), World and also some modern/contemporary. I don't have anything against popular music as well.