Subwoofer Advice For Stereo Music System, Not HT


I recently purchased new the following:

Jolida JD302BRC Tube Integrated Amp
Jolida JD100 Tube CDP
APC H-10 Power Conditioner
Wireworld Cables and Interconnects

all added to my current Klipsch KG5.5 floorstanding speakers.

I absolutely love the mids and highs produced by this system, but the lowest frequencies, while nicely detailed, are just not quite balanced with the mids and highs. I have had the system for a month now, and have at least 40 or 50 hours on the system. I have tried numerous speaker placement options, and currently have the speakers placed almost against the back wall. This gives the best bass, but still not quite what I seek. I have decided I may have to add an active subwoofer. I can't help but believe that the proper sub would be the final piece to make this system really shine for my small 13x14 listening room. The system is used only for music, no home theater.

Given the above, what do you think I should I look for in a sub? I am currently looking at the Velodyne MiniVee or the Velodyne SPL-800R. I would think these models should give me the added bass while keeping distortion and boominess to a minimum. They are also sealed instead of ported, which I have read is better for stereo music. Am I on the right track here, or are there other models/brands I should consider? My budget is $1k or less.

Also, the Jolida int amp has two sets of pre-outs. One fixed and one variable. Which would be more beneficial to use for the sub, or should I just hook the sub to the speaker binding posts?

Thanks.
chap_cat
Folks, thanks for all of your advice, and don't hesitate to keep it coming. It is much appreciated and considered.
I owned the Velodyne SPL-800II and enjoyed it. The sub was easy to integrate with my system which is a plus. But for deeper, cleaner bass I purchased a James EMB-1000. Another sub which is easy to integrate. This thing can rattle the windows with no strain. It's a sealed unit also.
I haven't read all of the answers but IMO use the variable preamp outs instead of speaker outputs.
I second what Pacific_island and Samhar have said.
The Vandersteen 2wq Subs are sealed boxes (not ported) and so the bass is real and tight (not bloated and full like the ported designs).
Having 2 of them as a stereo pair not only will give you the bass you want, but will help fix any room resonant problems as it will 'pressurise' the acoustic space if positioned in 2 opposing corners. They also will help eliminate intermodulation distortion in your main speakers' woofers.
I had the REL Stadium II for 10 years and the Vandersteens are in a different league.
Post removed