Reddit reviews AN-130 Speaker Monitor
We found 1 Reddit comments about AN-130 Speaker Monitor. Here are the top ones, ranked by their Reddit score.
This unit comes with only the powered speaker. any other items mics, remotes, etc... must be added at additional cost.101 dB SPL from 30W Amplifier and High Efficiency SpeakerUnbalanced Lo-Z 14 Mic Input
I don't think $50 is going to get you anything ceiling-mounted and powerful enough to cover a regular classroom, even with the fanciest little speaker you can get at that price range. That said, if the projector has USB ports to keep it charged, I have good experiences with this model in terms of sound quality and volume:
https://www.amazon.com/Anker-SoundCore-Bluetooth-Dual-Driver-Distortion/dp/B016XTADG2
But once again, this isn't really a problem you can sufficiently fix for $50. We use these in a classroom setting:
https://www.amazon.com/Anchor-Audio-AN-130-Speaker-Monitor/dp/B000YYVVN2
They sell ceiling mount brackets for them as well and have excellent coverage. Just make sure you have accessible power plugs near the mounting tile.