Acer K11 Projector - Performance
7-22-2011 - Mike Rollet
Acer K11 Projector - Brightness
The K11 is rated at 200 lumens. As there is no zooming ability, all measurements were taken with the projector displaying a 50” diagonal image with the projector just under 7 feet from the screen. Consistent with other reviews, our measurements were taken at the brightest point of the image (usually near the center bottom of the image).
Selecting the Bright picture mode (the brightest), we measured a high of 209 lumens, just as advertised. Using Presentation mode, the output dropped to 177 lumens. Next, Standard mode dropped to 167 lumens. Video and Picture modes, which were very similar in appearance, also were nearly identical in lumen output at 133 and 135 lumens respectively. Game mode increased the output to 152 lumens and User mode (in its default settings) was equal to Bright mode at 209 lumens.
In addition to the above picture modes, the K11 also has settings to maintain decent color when projecting on walls of different colors. The wall color setting is available in any picture mode and affects the lumen output of the Bright picture mode as follows: White (default mode) – 209 lumens, Yellow – 197 lumens, Grey – 205 lumens, Pink – 177 lumens and Black – 164 lumens.
Below, the Acer K11 projector in Bright mode.
Acer K11 Projector - Audible Noise
As the Acer K11 uses LEDs rather than a lamp, heat generation is reduced and the two small fans that create air flow through the projector are relatively quiet. Acer does not provide a dB rating, but I would guess it to be well under 30 dB. This is a good thing, as the puny built-in one watt speaker will not be able to overcome much noise.