DonM: Great to hear that the built in speakers alone are working for you for your small private party affairs, but I have to agree with Denny. The onboard speakers on the PSR2000, though an improvement over the Technics KN5000 one's, just don't cut it for me, for providing the 'sole' sound source, even for those small venue background music type jobs. The problem is NOT volume, but that the PSR2000 4.72" woofers aren't able to deliver 'smooth rich' sound, that only larger woofers can provide.
On the other hand, I do LOVE 'built into the kb speakers' for stage monitoring purposes, as they're positioned & aimed ideally for us the keyboard player.
The thing I like about my new Motion Sound KP-100S for small-medium venues, is that it's able to perform DOUBLE duty, positioned directly behind me, it functions both as my personal stage monitor, as well as acting as the MAINS: delivering a rich smooth 'full bodied' sound into the room (audience). I'm especially thrilled now after I recently swapped out the factory woofers with ones that significantly extend the bass frequency response. Previous to this, I would need to take the Tyros TRS-M01 subwoofer, but this is no longer the case. I feel I now have both my cake and can eat it too, cuz not only has my gig load gotten lighter, but gig setup time has gotten easier (quicker), and sound quality has improved substantially as well.
Scott
