Not knowing what to get for the KPA, I ordered two powered speakers on recommendation of friends. I tested the Yamaha DXR10 and the Line 6 L3t. I have been playing them for the two days now.
They DXR10 was due to a forum members recommendation that it was very close to the Atomic CLR, the L3t because a close friend has three of them in his club.
I will try to post a video or sound comparisons but I find these to pretty much be less than useful due to YouTube compression. However, in my studio, the L3t is open, very loud, the high and low end crisp, clean and defined and the speaker is significantly more transparent than the Yamaha. The L3t also have a great sound with my acoustic and no outboard processing other than what the L3t provides.
The L3t is more expensive than the Yamaha, but the difference is IMO worth the additional expense. When used on it's side, the speaker is 33" wide and 12" high/deep. Not small, but workable. I don't find it very heavy to move around but it is certainly not a lightweight by any sense.
The KPA sounds incredible through this puppy. I am not a metal/crunch/heavy distortion kind of guy, but for classic rock, country, jazz and blues, the L3t is blowing me away. Every note, every chord, every hammer-on is defined and articulated. I realize it's been only 2 days, and I really want to play more with the Yamaha, but every time I disconnect the L3t and play the DXR10 I shrug and jump back the the Line 6.
FWIW, just a few initial thoughts from a 70's rocker.