Looks like it PA day on the forum so here's some more info:

PA Review: JBL 515XT Vrs. JBL Eon One

I got the manager of the small music store I teach at to get an Eon One in to replace the Bose Compact they finally sold. So I wanted to compare it to the 515xt�s I�ve been using. He said come in early and use the back rehearsal room and go at it. I wish I could do this with some other systems out there like LD Maul, Yorkville EMX or Turbosound.
Set both up in a large practice room at the back of the store. Brought my Roland BK9 Arranger and IPAD. I have a A/B switch so I could go from one to the other quickly. First thing was the One didn�t like to be set on �line� with my keyboard. Hardly any volume so I had to set it to �Mic.� After balancing the volumes of both systems I tried to also EQ them equally. Very small adjustments. On the �One� I set the Bass to 1 O�Clock with 12 being neutral. Same with the�515�, Treble was left neutral on both
First played just Piano. �One� was much clearer in the midrange. I know I�m not as critical as some here about Piano sounds but both did a good job thru the full range of the keyboard even when pushed in volume.
Tried some Arranger Styles with Vocals. Jazz, Ballad, Rock. Again both did a good job with the One again being clearer with the vocals. Did some Hammond sounds with LH bass and backing drums. Surprisingly the One carried the Bass as well as the 515. And with a 10� speaker !
Same results with some SMF�s. Pushed both up in volume and they did fine.
Then I did some Dance Tunes with the IPAD. Pushed both Systems to what might be their top levels. The One�s limiter started flashing but the system didn�t break up or distort. The 515, having a lot more power didn�t stress at all at that point and could of gone louder. Any more sound needed I would use two of either system for stereo and better coverage.
BUT !!! Here�s my conclusions. The One is a more balanced, clearer sound with actually better Bass response then the 515. It also has wider coverage. To be fair I think the 515 was meant to be part of a larger system with its matching SUB, while the One is a full range stand alone system. And of course the 515 has been replaced with a 615 which has a larger cabinet and more bass response so it could be more of a stand alone system also.
After packing up I brought everything back to the front of the store. I was surprised that even thought the One weighed more it was easier and less bulky to carry with its built in handle than the 515 in its Bag. And a biggie for me, no speaker stands needed for the One.
I was truly surprised with how much sound came out of the Eon One. For my larger gigs and to do stereo I would defiantly want two but it is an amazing system. Now I need more gigs to cover my PA GAS.