The KP100S did not work out for me. It was not powerful enough. My new setup, two Yamaha MS100 speakers, together weigh about 5lbs. more than the KP100S. But each 100 watt speaker goes way louder than the 100 watt KP100S. The Motion sound speaker's volume output is anemic for a 100 watt amp.
The fidelity was good, but I had lots of venues where I couldn't deliver enough volume without distorting. I perform for elderly folks at nursing homes, retirement homes, senior socials, park district senior events and private parties. Now it is very rare that I am not loud enough. Next week I have a large picnic, so I will rent a subwoofer to augment my sound.
I think that perhaps a better alternative than what I had would be two JBL Eon10 G2s. They go even louder, and I have heard from people that have done side by side comparisons, that they sound better than the Yamahas that I have. The JBLs are slightly larger, more costly, but weigh the same.
I liked the concept of the Motion Sound system, and I overlooked for a long time that it wasn't cutting the cake.
With my current system, I get many many compliments on the quality of my sound system. This wouldn't happen very much with the KP100S.
An advantage of the Motion sound is quick setup. If you go instead with a small powered speaker, like the Yamaha or JBL, you can purchase a gig bag where you can always keep your power cable and speaker cable plugged in. When I get to a performance (remember I play at retirement homes), I put each speaker on top of a chair, I unzip the front face of the gig bag, revealing the speakers, and I pull out the power and speaker cables and plug them in. I use my keyboard to adjust the volume. It takes me less than 10 minutes to set up.
I am certain that a pair of JBLs would offer a more balanced sound than the Motion Sound. My yamaha speakers do, and even though my Yamaha MS100 speakers are rated with a superior bass frequency response than the JBLs, I have heard anecdotally that the JBLs have a fuller bass response, so go figure. Another advantage of two speakers is that you can set them 15-20 feet apart and get real stereo and less dead spots in the room.
Beakybird
[This message has been edited by Beakybird (edited 06-11-2006).]