Do I want a sub with VR-4jr's?

A REL or other high quality dedicated sub will give highly accurate extreme LF bass. This is useful in the 20 to 50 Hz range if you have monitor type speakers (designed for very low bass distortion and consequently limited in bass LF extension).

I can only suspect that your speakers neither need a sub and nor would they be easy to set up with a sub; they would share energy in the same frequency range making a match difficult.

I can tell I am lacking the very bottom of the audible range

I read somewhere that these speakers are specified flat down to 23 Hz +/- 2db... This is simpy an amazing specification. There is no possible way you should be lacking low end if these specifications are correct...unless you have a very large room or something is wrong with the speakers.

What is your source - are you quite sure you are sending the full LF range to your speakers? Do you have perhaps a huge room size?

Superfly676,

Semantics may cause me to misinterpret what you hope to gain with a sub. I may think of "punch" in a different way....I think of a tight bass as "punchy"...it kind of hits you hard. So please disregard this if I have misinterpreted your meaning....

There is not much "punch" in the frequencies below about 100 Hz...I fear you may be disappointed in your sub addition. Punch can come from a number of factors....a big amplifier with exceptional damping factor, a critically damped base driver, a speaker cabinet with no resonances or tuned ports (these are hard to drive), and the phase alignment between drivers: tweeter, mid and base. Very light and stiff driver materials can increase the punchy sound but this needs to be very carefully balanced with ringing resonance distortion (like a bell, a stiff cone can vibrate at certain frequencies which can make the bass sound boomy, especially a challenge with metal drivers). All these factors affect how much "punch" you get in the base.

I have not heard a woofer really deliver "punch". Such low frequencies simply do not lend themselves to producing that effect. Sub woofers produce sounds from vibrations (inaudible but you feel them) to a powerful deep "thud" (like a tyrannosaur is supposed to make as it walks beside your house).

Of course, you could eliminate the band limiting filter on your sub woofer, which would allow it to deliver "punch", however, the sub sound will become directional and disassociate from your other speaker drivers, producing a confusing soundstage to the ears.