There is some information available. Just a few weeks ago, at the Consumer Electronics Show in Las Vegas (CES) the EP500 won a
Home Theater & Sound Product of the Year Award. Here is
Home Theater & Sounds Review of the EP500.
Other Reviews include those by
Audoreview.com, and
Audioholics.com, who also awarded it a Product Of The Year Award.
I'm knocked out by my EP500. It has, by far, the smoothest, flattest frequency response I've ever experienced in a subwoofer. I'm amazed at how well it integrates with the rest of my system. I believe "seamless" is the correct term. I've owned JBL, HSU, and Rocket subs. All cost considerably less than the EP500, and all were competent performers, just not in the same league as the EP500.