VIVITEK QUMI LED 1280x800 - Page 7

Originally Posted by Bsims2719

I just ordered a Qumi from Amazon. Obviously they didn't give a ship date. Any word on when they arrive in the states?

Originally Posted by isaacmart

I too ordered one from Amazon but i noticed they had two of them one with the actual qumi picture and the other had another vivitek projector. I also didnt get an estimated date and i ordered the one with the actual picture of the qumi.So Robert which one did you order. The one with the qumi pic said out of stock the other with that other projector pic said usually ships within 2-3 weeks.

Originally Posted by PoisonWolf

I am really looking forward to see how this performs. Anyone concerned about the cooling on such a compact unit?

Originally Posted by KadMan

I went with black from Amazon as well. I just prefer black for most electronics, so it was a default choice for me. Not to mention that I'd rather take my chances with quoted stock dates vs the great unknown. I think the white model looks pretty sharp with the contrast of the lighted controls. If they suddenly listed the same shipping dates for white then I might actually be tempted.

I have a Prime membership and sprung for the $3.99 overnight shipping. Not sure if it will make a difference in the end, but whatever.

Originally Posted by KadMan

I have an Optoma PK301. If you want to see concern over heat, get close to one of those. Much smaller than this and it can blister paint at a range of 3 feet.

(...but mine keeps on ticking)

Originally Posted by Robert Clark

I have an optoma PK201 and it gets quite hot as well and no fan.

Originally Posted by MCaugusto

-----------------------------------------------------------------------
I have a LG HX300 that runs an average of 10/12 hours per day and whenever placing my hands on the case to check for its temperature, it is always barely warm to the touch with the fan running on low.
I would certainly expect the Vivitek Qumi to perform similarly...

Originally Posted by zombie10k

I just got my order in at Amazon for a white one. I have a number of other projectors, the JVC RS50, Mitsubishi HC5500 and Acer 3D DLP but this one is interesting because it's small and has the LED lamp which I can just turn on/off without worrying about lamp strikes.

I am thinking about setting up my old 92" 2.8 High power screen, I think it will be ok with only 300 lumens if the projector is on-axis with the HP screen. It's mainly going to be for TV watching.

I already have 3D with the Acer which is 800 lumens in 3D mode and the JVC RS50 which also has 3D. It will be curious to see how 3D mode looks on this small projector.

Originally Posted by MCaugusto

-----------------------------------------------------------------------
I have a LG HX300 that runs an average of 10/12 hours per day and whenever placing my hands on the case to check for its temperature, it is always barely warm to the touch with the fan running on low.
I would certainly expect the Vivitek Qumi to perform similarly...

Originally Posted by Lexor

Hey folks, I too am waiting for an LED projector that's 720p (or better) in the "up to $1000" range as my first and only projector, the Epson Home 10+ has dust bunnies in the imaging engine and the current and hopefully last bulb is on its last legs.

I almost caved and got the Acer K11 last weekend. A friend has one (he might even have the K10) and it projects a very decent image even in a moderately darkened room (but we're usually watching hockey with bright white ice lol). I'm very prone to notice the rainbow effect but it's not altogether too bad with this unit. My biggest (only ?) problem with the K11 is the native resolution.

I also had my eye on the Casio XJ-A240 for a long while but hesitated on pulling the trigger, partly because of the price, partly because of the fan noise and efficiency (at full blast this "green" unit uses more power than my old Epson -- frickin' lasers !). I also crave separate VGA, component, and HDMI inputs but as these units get smaller I should probably just give up hope here. Since the LED and laser lights are red, green, and blue, there's no colour wheel and that should mean no rainbow effect so maybe I need to take a second (seventh ?? lol) look at the Casio.

But then I found out about the Qumi thanks to this thread and I started getting excited. I am not too concerned that the fans in the shipping units will be too noisy, 300 lumens seems fine, 720p is great, 3D one day would be fun for an hour or two lol. And all at a very decent price. What's there not to love ?

But then I read this entire thread today, and it still seems that the Qumi won't be offering ceiling mount capabilities... WTF ??? All they have to do is generate the image upside-down. With a unit this light a tripod mount hole should be plenty fine for hanging it off a ceiling mount but it just won't work if the unit won't project an upside-down image. I don't see myself projecting on a down angle from a "ceiling shelf".

It seems to offer rear-projection, ie. backwards imaging, so I'll be really confused if they just don't give customers the option of projecting upside down whether they think there are proper mount points or not.

To be honest ceiling mount is not an option for me -- it's ceiling or nothing for my next projector. The kid-on-xmas-eve-effect is gone for me now for the Qumi.

Here I was thinking I might need to wait a few weeks for my next projector, and now I am wondering if I need to wait a few months for the new Acer... or maybe I cave and just get the Casio... ugh.

Originally Posted by DLPProjectorfan

MCaugusto ? I still got my LG HX300, the movies are ok with it, disappointed with using it on the Play Station 3 for games even with HDMI.
What would I expect to gt for it if I sold it ? it only has about 40 hours of time on it.
I don't know about the Vivitek Qumi , 300 Lumens ? not much jump from the LG HX300.
What would the improvement of resolution be expected on the Qumi from the LG HX300 ?
Maybe I should wait for the Acer with 500 Lumens ? that might be coming out later ?

Originally Posted by eat meat

well..

Originally Posted by Bsims2719

I don't understand the heat/noise thing. According to the Vivitek website the maximum power is 85 watts. Assuming worst case in that all of the current is converted to heat it would be the same as an 85 watt lightbulb. This is not that much heat? You could almost dissipate that with natural convection.

Originally Posted by crazedmodder

85W is quite a bit of heat. Do not forget that light bulbs are made of materials that can take high temperatures (pretty much just metal and glass) and they work better when they are hotter (to an extent). This goes for incandescent and halogen bulbs (think HIR, which are designed to keep heat within the bulb). LEDs are like integrated circuits in that they despise heat so for equivalent wattages to bulb projectors they will probably need better cooling. Most LEDs have their brightness rated at 21C or 25C and if you check this datasheet for the PhlatLight CBT-90-W you'll see on page 6 that maximum temperature is 150C but when you check page 7 you can tell by the "Median Lifetime" chart how drastically the lifespan of the LED changes. Also that is junction temperature, the temperature coming out will be lower. Add that in with the tiny size of these units which has components that are more tightly packed and harder to ventilate and you will need some good cooling. 1W LEDs can use small to medium sized passive cooling, 5W and you need larger heatsinks, 10W+ you better have some huge heatsinks or active cooling. These units probably have small heatsinks, they need a way to get the heat out and the unit is small so they have to use small fans which need to run faster to move the same amount of air as larger fans that run at lower speeds.

Anyways, this Qumi needs some reviews to come out. They are nearing release date but are not trying to drum up interest by sending out units? My HD70 bulb just blew with ~3200 hours on it and I do not plan on getting another bulb projector. For me its Qumi, Casio (a bit too pricey though) or a 32-40" TV (yuck).