ES503 Stereo : Amazing for such compact design

Positive: I was very pleasantly surprised about the sound quality and loudness. It is absolutely sufficient for a small outdoor venue of ~100 people. Sure, the bass is what you would expect from 12'' woofer, so it wouldn't do for a rock band live venue, but for a reproducted music, this is a perfect small system that fits in a small car trunk along with the speaker stands, cables, mix, and there's still a place for a keg of beer. The audio quality is good even for home use (I didn't expect it from a PA system) - I am really not any close to being an audiophile, but I believe can tell a good sound from bad one.

Negative: On the other side, the control using a single knob is just silly. The system has many functions, and having to switch between different menus just to adjust channel volume vs. overall volume, that's bad. I would not recommend using it without an external mixer for any purpose than playing a single (mono or stereo) channel.

Neutral: The satellites are relatively directional, place it in a corner if you can, or farther from people when outside.