Full range or subwoofer with bookshelfs for best bass at low to moderate volume?


I have an older subwoofer with bookshelf speakers and the subwoofer is dying. I listen mostly at low to moderate volume and am in the middle of changing over my system as my Pioneer Elite VSX 49 TXI receiver was degrading, also due to age. My question is whether a subwoofer with bookshelf speakers or full range speakers produce more bass at low to moderate volume? 

Current system:
Moon Audio 250i integrated amp
Angstrom signature 3 speakers ( 6.5", Seas drivers, 86 DB, 6 Ohm)
Paradigm subwoofer (needs to be replaced)
Denon 2910 used as transport
Looking for an analog sounding dac at this time

mtloriginal
@mtloriginal
This is a nice SVS sub that has been replaced with a newer mode (SB2000) . The price was $679.00 before it was discontinued. It is a bargain at this price ($399)!
https://www.amazon.com/SVS-SB12-NSD-400-watt-Controlled-Subwoofer/dp/B009F8Y7SO
Willland, thanks for the offer. The subs you listed are older and I am not looking for anything over 3 years old. 
Bob_reynolds and yogiboy, I was surprised and happy to see the good reviews on the SVS subs, hard to find a decent sounding sub under the $1000 list price. I really wanted something other than black, but may consider black at a later date.
Thanks for the replies.

mtloriginal
bob_reynolds,

You stated:
"Though I’m a fan of Dr. Geddes and Duke’s implementation, the above quote isn’t quite true. The vast majority of systems use parametric equalization to manage room modes. Both approaches have their place."

It is true that the vast majority of systems do use parametric equalization.
But your statement implies that parametric equalization is as effective as a DBA system in managing bass room modes. This is definitely not true.
A parametric equalizer, at best, can optimize bass response at a single location or sweet spot. Wherever the calibrating mic is placed will be the only spot in the entire room where bass is optimized. Get up and walk anywhere else in the room and you’ll be disappointed in the bass response.

A DBA 3-4 sub system will eliminate the vast majority of bass standing waves in any room, optimizing bass response in the entire room. There’s not a bad seat in the room.

Both may have their place but they are not even close to equal.
Comparing parametric equalization to a DBA is like comparing a band-aid to a total cure.

I stand by my statement.

Tim


Post removed 
"Willland, thanks for the offer. The subs you listed are older and I am not looking for anything over 3 years old."

@mtloriginal,

Not selling, just wanted to show you that good subs for good deals can be found on the used market.

Bill