Acer K11 Projector

The Acer K11 Projector ($379 list) is highly portable, and can run presentations from a computer or off a USB thumb drive or SD card. At 200 rated lumens, this palmtop data projector is brighter than its palmtop projector peers that we've tested. Its image quality is decent for both stills and video.

The K11 has the looks of a classic palmtop mini-projector: black (glossy on top, matte on the sides?where not broken by grilles for ventilation and to expose the speaker). The projector is a nearly square box, measuring 1.7 by 4.6 by 4.8 inches (HWD)?it might fit in a winter coat pocket, but it would be tight. I weighed it at 1.25 pounds, with the power adapter and cord adding just over a pound more. The Editors' Choice Dell M109S is even smaller and lighter, but it's dimmer at 50 lumens and more limited in features, lacking a remote for one thing.

On top of the K11 is a four-way controller with center button, with which you can access the menu system. It also comes with a tiny remote control, smaller than business card (if not as think).

The K11 has a native resolution of 856 by 600 pixels, a rated brightness of 200 ANSI lumens (bright for a palmtop), and a rated contrast ration of 2,000:1. Inputs include VGA, composite video, and HDMI ports. It can operate as a standalone projector, running off a USB thumb drive or SD card./p>

Performance
In my testing using DisplayMate software (www.displaymate.com), image quality proved typical of a palmtop projector. Some minor artifacts?a recurrent shadow at one edge of the field of view, and some slight tints?were visible, but didn't seriously detract from the viewing experience. The projector did well in displaying both very bright and very dark grays.

As a DLP projector based on TI's Digital Light Projection, the K11 is subject to the rainbow effect, in which white areas on the screen are broken into their constituent (red/blue/green) colors, particularly in moving images or when one's eyes move quickly. I'm not particularly sensitive to the rainbow effect, and although I noticed a trace of it in both still and moving images, it did not approach the level of distraction.

Video quality was good enough to show clips as part of a presentation, and it is adequate for showing a full-length movie in a small room. As is often the case with small projectors, the video quality is better than the audio. The K11's 1-watt internal speaker can only be heard in its immediate vicinity, and its sound quality is mediocre. The projector lacks an audio-out jack, so it can't be used with powered external speakers. The Editors' Choice BenQ Joybee GP1 ($500 street, 4.5 stars) provides a louder (2-watt) speaker and an audio-out jack.

The Acer K11 Projector is bright for a palmtop projector, with a good range of connectivity options, including HDMI-in as well as the ability to run presentations off of a USB thumb drive or SD memory card. It image quality for both still images and video is good, but its weak 1-watt speaker and lack of audio-out confine the use of video to short clips as part of a presentation, or staying in the immediate vicinity of the projector if you're watching a movie. The BenQ Joybee provides louder audio as well as audio-out. But if you plan to stick to data presentations, the K11 is just as capable, and available at a lower price.

COMPARISON TABLE
Compare the Acer K11 Projector with several other projectors side by side.

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