Vivitek QUMI Projector – Performance

Vivitek QUMI Projector - Brightness

The QUMI is rated at 300 lumens.  As there is no zooming ability, all measurements were taken with the projector displaying a 60” diagonal image with the projector set at a distance of about 7.5 feet from the screen.  Consistent with other reviews, our measurements were taken at the brightest point of the image (in this case near the right center of the image).

Selecting the Bright picture mode (the brightest), we measured a high of only 169 lumens, quite a bit less than advertised.  However, when the QUMI is connected via its Universal HD input to a computer VGA output, the lumen output increases to 198 lumens.  This is because with this connection Brilliant Color is increased from 8 to 10 (the maximum).  Using Presentation mode, the output dropped to 149 lumens.  User, Game and Movie modes were identical to Presentation mode in lumen output at 149 lumens.  sRGB mode (which like Bright mode has Brilliant Color set to 8) came in at 165 lumens.  TV mode measured the lowest, at 145 lumens.

In addition to the above picture modes, the QUMI also has an Eco mode for its LED light source.  In Presentation mode, using the Eco setting reduced the lumen output from 149 lumens to 59 lumens.  Other than the power savings of Eco mode, there seems little reason to use it as the drop in output is so great.

Vivitek QUMI Projector - Audible Noise

As the Vivitek QUMI uses LEDs rather than a lamp, heat generation is kept to a minimum and the exhaust ports keep the QUMI relatively cool.  Vivitek rates the noise levels (primarily of the exhaust fan) at 32 dB (when in “Boost” mode, which appears to occur in Bright mode) and 28 dB for normal modes.  The higher level is noticeable, but not objectionably so.  The normal level is barely audible.  The QUMI has a built-in one-watt speaker that can overcome the higher noise level, but you’d probably want to use externally powered speakers for any presentation with sound.

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News and Comments

  • Siso Novemila

    Check the accuracy of the manufacturer’s statements by friends or network seems that the maximum duration is only 5000 hours


      Hi Siso, Strange. Claims for LED light sources for projectors are typically 15000 to 30,000 hours. Obviously manufacturers can’t run them that long before coming up with that spec, so there are standardized testing methods used by companies (for estimating the life of all kinds of devices and components.

      When I say strange, though, 5000 hours is awfully short for any led light source.

      What interests me, though is my surprise that there are consumers out there who have even reached anything near 5000 hours use. The projector has been around for just five years, so that’s 1000 hours a year. I’m sure there are folks who may use a pico projector 20 hours a week, 50 weeks a year to reach that 5000 hours, but I would expect almost no one to put that many hours a week on a low power pocket projector.

      We reviewers, of course never get to hang on to projectors for more than a few weeks, so, we’re forced to go by manufacturer claims. Sadly if an LED light engine fails at 5000 hours, even if we know about it, it’s too late. By that time, the product, like the Q2, is already long discontinued. In the case of the Q2, the product was discontinued a little more than a year and a half ago. -art