The Casio XJ-F211WN has a 16-watt mono speaker. That thing is loud. Plenty loud for a large classroom or conference room, just above half-volume. I wouldn't crank it up all the way, though. The sound gets highly distorted at full volume, but that distortion dissipates the lower the volume goes. About 5-6 clicks down, you'll get good sound, loud enough for the environments in which this projector will be used.
Of course, being an onboard speaker, you don't get any real bass. That shouldn't be a problem unless you're getting this projector for a film class, like my husband's class, where the students may be learning about sound design in films. If that's the case, you'd only need some external speakers to make this work.
That's it for Picture and Sound Quality. Next up, we have our Performance Page, where we talk brightness, contrast, and audible noise.
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