JL Audio e112 sub vs. JL Audio Fathom 112 v.2

Something is wrong if you have your sub turned "all the way up" at normal listening levels. Either you are using an A/V receiver with separate bass level control (set too low) or you've blown a fuse in the sub and think it is still working (but it isn't). Check it out.

I think I misled everyone:  the volume of the e112 is turned up about 3/4 of the way, rather than all the way up.  (I am fairly certain that the sub is behaving properly because after receiving it from the dealer I sent it back to get it checked out, and it was fine.  My listening room size is 23 feet (length) X 12.5 feet (width) X 8 feet (height). 

If you have efficient mains and a powerful amp that could be what is requiring you to use so much sub volume to keep up. I have 2 e112s in a 25x28" room and I run them at about 30% volume. 

James, I have custom-built Audience Wavemaster D-class monoblocks which are pretty powerful.  Please excuse my ignorance, but what are "mains"?  It would, of course, be less expensive for me to buy a second e112 than a new Fathom 112.v2, so if that would work well that sounds like a grand idea.  Glenn

Emailists,
My former Velodyne sub was a "Digital Drive" model, not a "DD+".  Before I purchased the JL Audio subs, I did audition a 15" DD+ sub woofer, but it was not setup well, sounded boomy, not well-defined.
I've been really happy with both my former Velodyne & my new JL Audio's, if anything the JL's seem to be "faster".