Sound from the K137's two 3-watt speakers is surprisingly loud and of decent quality, and should easily fill a small room. The K137 offers something we've seldom seen in the recent crop of LED-based mini-projectors: a good audio system. Rainbow artifacts were prominent enough in video that they would be distracting to people sensitive to the effect. As mentioned above, the K137 is best used in small rooms with little or no ambient light. Video and Audio Video quality is fine for showing shorter clips as part of a presentation. I noticed rainbow artifacts in the K137's data images, but they shouldn't be a distraction there, even to people sensitive to the effect.
Indeed, the K137's text was unusually poor, as the type was blurred at the three smallest white-on-black font sizes and the two smallest black-on-white sizes.Īll single-chip DLP projectors are potentially subject to the rainbow effect, in which one may see little red/green/blue flashes in light areas against dark backgrounds, particularly in moving images or when one's eyes move quickly. The main exception, though, is text quality. Such artifacts shouldn't have any effect on most kinds of images used in presentations. These resemble scaling artifacts, which normally appear when there's a mismatch between the image source's resolution and a projector's native resolution, although with these LED projectors, both resolutions are 1,280 by 800. The K137 shares one issue with many recent LED-based WXGA projectors we've reviewed that use a TI DLP chip: the appearance of spurious, often dark lines in images with patterned fills. Some white backgrounds showed modest green tinting, and there was mild yellow fringing at the borders between some dark and light areas (such as at the edge of the image). In my testing using the DisplayMate suite, data image quality was below par for a mini projector due to poor text quality. Image quality was adversely affected by the introduction of a modest amount of ambient light, so this projector is best used in a dark room. It also has an audio-in jack.ĭata Testing When I placed the projector about six feet from our test screen, it filled the screen with an image that measured approximately 60 inches (diagonal). It has a USB type A port that fits a USB thumb drive or an optional Wi-Fi adapter, and a micro-SD card slot, either of which will allow you to run presentations computer free. It comes with two HDMI cables, one of them HDMI to mini-USB for MHL support. The K137 is 3D-capable, but you'll need DLP-link, active-shutter 3D glasses.Ĭonnectivity The K137 has a universal I/O port for connecting to a computer via VGA using an adapter cable a USB type B port for connecting to a computer, and an HDMI port, which also supports MHL. On the bottom of the projector is a threaded hole that allows you to screw the projector into a tripod. A tiny remote control comes with the projector. Its LED light source is rated at 20,000 hours in Normal mode and 30,000 hours in Eco mode, so the bulb should easily last the lifetime of the device.Ī four-way controller with center button can be found on the top of the K137, and it lets you access the menu system. Afghanistan, Alaska/Hawaii, Algeria, American Samoa, Andorra, Angola, Anguilla, Antigua and Barbuda, Armenia, Aruba, Bahamas, Bahrain, Barbados, Belize, Benin, Bermuda, Bhutan, Botswana, British Virgin Islands, Brunei Darussalam, Burkina Faso, Burundi, Cambodia, Cameroon, Cape Verde Islands, Cayman Islands, Central African Republic, Chad, China, Comoros, Cook Islands, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Djibouti, Dominica, Dominican Republic, Egypt, El Salvador, Equatorial Guinea, Eritrea, Ethiopia, Fiji, French Polynesia, Gabon Republic, Gambia, Ghana, Gibraltar, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guinea, Guinea-Bissau, Haiti, Honduras, Hong Kong, Jamaica, Kenya, Kiribati, Kuwait, Laos, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Macau, Macedonia, Madagascar, Malawi, Mali, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Namibia, Nauru, Nepal, Netherlands Antilles, New Caledonia, Nicaragua, Niger, Niue, Palau, Panama, Papua New Guinea, Republic of the Congo, Reunion, Russian Federation, Rwanda, Saint Helena, Saint Kitts-Nevis, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, San Marino, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Solomon Islands, Somalia, South Africa, South America, Svalbard and Jan Mayen, Swaziland, Taiwan, Tanzania, Togo, Tonga, Trinidad and Tobago, Tunisia, Turks and Caicos Islands, Tuvalu, US Protectorates, Uganda, Ukraine, United Arab Emirates, Vanuatu, Vatican City State, Virgin Islands (U.S.The DLP-based projector has native WXGA (1,280-by-800) resolution, a rated brightness of 700 ANSI lumens, and a 10,000:1 rated contrast ratio.
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