Hello

You didn't mention what kind of keyboard you use, but I am very happy with two JBL 10 G2 powered speakers. I think they are about 175 watts. I use the built in mixer on my PSR2000. I use these speakers as main and monitor. These babies kick. They weigh only 23 lbs.!! I used them publicly for the first time a few weeks ago in a pretty good sized ballroom and they did the whole job.

Scott Langholff