Anyone who thinks that the actual measurment of a speaker counts for anything is really missing the larger picture here. The best compliment I can give the manufacturers of today's gear is that they really make them sound GREAT in their own, internal world.

Sure, we can make their sound even better with the advanced technology of a higher end system, but the simple fact is ..... most arranger kb's in the $1000+ range really do have a nice balanced sound.
Now, to be fair, it doesn't carry very far ... but it was never intended to. In many instances, the sound of an even, pleasing background song is absolutely perfect when accompanying a strong, well trained voice in the hands of a seasoned performer.

Whenever I am in a situation where the volume is a minimal requiriemnt, I try to put all the puzzle pieces together for a great fit. This included my voice. Sometimes, I don't even need to amplify that. My acoustic sound is pretty strong, and many times at wedding services, I use the kb speakers and my acoustic voice ... and that's it.

Churches (and some tents) have terrific natural reverb, and my voice carries to the last seat without a strain.

It's all a case of perspective. Sometimes, little, tiny, plastic speakers really DO cut it. If you haven't experienced a situation like this yet .... you're missing a great time. It's nice to hear the acoustic nature of ANY instrument to remind you of the purity and soul that it can convey, and vocals are no exception.

Before you all start singing the "larger PA is best" saga ........ set up in a small room, and quietly, intimatly communicate with a relaxed nature. See if you like it.
I personally, enjoy the heck out of it.

I'm 48 and have been singing since 1969. The only reason I still have perfect hearing is because I never embraced the volume.

Gear will never "make" a peformance. Please forget everything you ever heard that might suggest that you are a better musician if you use better gear. A master carpenter with a cheap hammer can build a fine house, but a weak voiced singer with no sense of swing can never make a millon dollar keyboard entertain a crowd. You gotta have heart, before you can sell your soul!