Not really a fair comparison in light of the price difference, but who said life (or speaker comparisons) had to be fair? I didn't A-B'em exactly, but I had been listening to the Polks pretty heavy before the Energys arrived, so I just listened to a lot of the same stuff on the Energy speakers. Number one difference: the Energys have tweeters! I guess it's just a taste thing as most folks like the LSi tweeter just fine. Not me. I tried to like it because of all the good press, but to my ears it was dullsville. The aluminum dome on the Energys has lots of...energy:) The shimmer of cymbals is back! The "air" is back. Nice! Crappy recordings sound like crappy recordings, too. Oh well, ya can't have everything.
Mids are very good. Probably on par with the 9's, but not as good as the La Scala II's I had previous to the LSi's. But there is more midrange air than the big ol' Klipsch, which is nice. And the sweet spot is much wider. That is nice, too. Wider than the LSi9's. I don't know why, though.
Bass is good, but not too extended. It seems to peter out at about 40Hz with both ports open. But since I use the pair of Velodyne subs, that's not really an issue. In fact, I get extremely smooth bass plugging both ports and crossing over from the RC50's to the subs at around 100 Hz. In fact, it's the smoothest bass response I've ever measured. And flat down to the 25Hz band...not too shabby if I do say so myself!
All in all a very well-balanced speaker. It does well with all kinds of music, which is very important to me.
Build quality is outstanding and the finish is exquisite. The color of the cherry is a little redder than I hoped (I was hoping for something more like the LSi9's) but I guess I'll get used to it. It's just that it doesn't exactly compliment anything in the house as our house and furnishings are almost all in oak and walnut. But taken on their own, they are beautiful.
I'll post some pics soon.