Portable LED Projector
December 16, 2013
The only limitations worth mention that I ran into with the ML550 are typical for this category of projector.
Low audio volume. The 1-watt speaker is loud enough for a group of two or three people close to the projector, but low quality. If you need sound, you'll be better off with an external audio system or headset.
No zoom. As already mentioned, the ML550 lacks a zoom lens.
3D is highly limited. The 3D support is strictly for use with computers. As a practical matter, it's actually even more limited than that suggests, since 3D effectively cuts brightness by more than half.
Compared with other portable LED projectors, the Optoma ML550 offers the advantage of being smaller and lighter than most models with similar brightness, and brighter than most models with a similar size and weight. It can also free you from carrying or even needing to connect to bulky image sources like laptops. Instead, you can use a USB Key, microSD card, the projector's own internal memory, or a cell phone or tablet. Add in the good data image quality, watchable video, and sub-$500 price, and the ML550 is well worth a look.