Which Subwoofer would you choose?

JL F113

http://velodyneacoustics.com/

Actually, Velodyne Acoustics is very much in business in the same location on Digital Drive in Morgan Hill CA.

Their audio related sensor technology has evolved a new company, LiDAR on Hellyer Ave in San Jose CA. for the development of sensors and applications for autonomous navigation and currently provide a variety of these applications to an impressive list of international manufacturers. 

I've owned five Velodyne subwoofers over the years. I currently own two DD Plus subwoofers one purchased new from Velodyne the other used. My only service experience with Velodyne, they replaced the infrared sensor in the used sub out of warrantee for a reasonable price and in less than two days.

I'm guessing they don't offer a product for less than $275. The SPL I owned is still doing duty in a friends home theater.   

Another vote for the Dayton from Parts Express. They are new with warranty and fit your budget. Parts express stands behind their products. I've used several in this line of subs when setting up budget systems and you can't get more for your money. 

I recently looked a several subs for my system and was amazed at the  GoldenEar ForceField 3  which I ended up adding to my system and contemplating adding another.  1000 watts of clean, deep and sharp bass.  I highly recommend new or used.  You will not be disappointed.