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Acer K750 LED/Laser Hybrid - Page 6

post #151 of 244
For awhile there Newegg had it on sale for around $ 1000 $ 900.
post #152 of 244
Quote:
Originally Posted by DLPProjectorfan View Post

Was there any motion blur in sceens that are fast paced ?
It has been reported that this projector does not do very well in sceens where the action is fast and shows motion blur.
Would it have to do with the hardware or software in the projector ?
Wouldn't the DMD DLP in this projector be the same as for example another projector that does not have motion blur ?
So if this projector has motion blur and another projector that has the same exact DMD DLP chip does not have motion blur what could be the cause of it ?

Please do NOT take this as a definitive answer - I'll run some test patterns when I get back - but I don't remember seeing any display-induced motion blur, which should be minimal on DLP anyways.

IIRC one of the reviewers said that the projector didn't display 1080p24 natively, but rather did a 3:2 pulldown and displayed 1080p60, which would introduce judder, but I don't really remember seeing that either (not that I was specifically looking for it). The manual doesn't list 1080p24 as an accepted resolution - only 1080p50 and 60 - so I'll try to hook it up to my Radiance and take a closer look at that with some test patterns and sequences when I get home.
post #153 of 244
Quote:
Originally Posted by JackB View Post

When I looked this K750 up on the Projector Central Calculator it listed the foot lamberts for a 1.0 gain screen at 100" 16x9 diagonal to be 45 fl. When I did the same for the JVC RS55 it showed 31 fl. My RS40 fl from this tool says 17 fl. This says that the K750 is 45% brighter than the RS55 and more than two times as bright as my RS40. Does your viewing of this bear out this tool or is the Acer overstated by Projector Central? So much brightness seems too good to be true.

Also, do you have the ability to calibrate it with proper equipment? This could be a great soultion if you can get it anywhere near the JVC after calibration.

I have an i1Pro, an i1D3 Pro profiled to it, a light meter, and ChromaPure, so I have the ability to take a full range of measurements. IIRC the PJC calculator generally uses Mfr reported lumens unless they've measured a unit themselves, and we already know that the calibrated output of the K750 falls well short of the 1400 spec'd lumens. I haven't viewed the K750 on the same screen at the same size as my RS55, but I guarantee that the former will be much dimmer than the latter when calibrated.

Quote:
Originally Posted by JackB View Post

Tried to find this on Acer site. Looks like it is not offered any more. Only K330 shows up. Must have found that no one wanted to pay close to 2K for it or they had too many product problems. Too bad.

I don't think the K750 was EVER listed on the US Acer site. Very strange considering it sold for almost a year, although just as strange was that Newegg seemed to be the only US company that carried it (as others have pointed out, it's even listed as Discontinued there). Given that projectors - especially business projectors - are such a low margin item, I'm guessing that the K750 was expensive to make, otherwise Acer would have sold them for far less just like the LED-based K330. I think at $900 this projector is a great deal PQ-wise, but everyone has different priorities, and lacking 3D and a higher calibrated light output may have still hurt it. I guess we'll never know, unless Acer plans on releasing an updated version soon.
post #154 of 244
Discontinued, nooooooooooooo.

I already missed out on the panasonic alpha panel lcd , now acer is killing this off.
post #155 of 244
Quote:
Originally Posted by HogPilot View Post

......if anyone has any questions or things they'd like me to look at, I'd be more than willing once I return home.


Thank you for passing along your initial impressions. Could you please comment on fan noise & heat output of the unit?
Also you mentioned it did well with a Blu-ray feed, any chance you could see how it handles HDTV?

Thanks again!
post #156 of 244
Quote:
Originally Posted by David44 View Post

Thank you for passing along your initial impressions. Could you please comment on fan noise & heat output of the unit?
Also you mentioned it did well with a Blu-ray feed, any chance you could see how it handles HDTV?

Thanks again!

I found the fan noise to be very reasonable - when you initially turn it on the fan is loud for a second or two, and then settles down. I was sitting right next to it and it wasn't that loud; if you had it mounted away from you, I doubt you'd hear it unless you put it in high altitude mode.

I'll try to feed some HDTV to it once I get back - what in specific are you curious about?
post #157 of 244
Quote:
Originally Posted by HogPilot View Post


I'll try to feed some HDTV to it once I get back - what in specific are you curious about?

I'm not sure which is standard for HDTV, but I think my question may overlap with your comments above regarding 24 vs 60 frame broadcasting. I have DirecTV and worry that a "business oriented" PJ will degrade the picture (vs. an LED TV). Primary viewing interests are sports, news, animation, and sitcoms, as I would like to use it in place of a large panel TV.

Safe travels & Thanks again.
post #158 of 244
Quote:
Originally Posted by David44 View Post

I'm not sure which is standard for HDTV, but I think my question may overlap with your comments above regarding 24 vs 60 frame broadcasting. I have DirecTV and worry that a "business oriented" PJ will degrade the picture (vs. an LED TV). Primary viewing interests are sports, news, animation, and sitcoms, as I would like to use it in place of a large panel TV.

Safe travels & Thanks again.

Do you know of any 24p broadcasts? I know it's supported by ATSC standards, but I don't think I've ever seen anything but 720p60 or 1080i60 (the latter of which can carry a full 1080p24 signal in interlaced form for conversion back to progressive if done properly). If you can point me in the direction of a specific channel I'll give it a watch and let you know what I see.
post #159 of 244
Quote:
Originally Posted by HogPilot View Post

Do you know of any 24p broadcasts? I know it's supported by ATSC standards, but I don't think I've ever seen anything but 720p60 or 1080i60 (the latter of which can carry a full 1080p24 signal in interlaced form for conversion back to progressive if done properly). If you can point me in the direction of a specific channel I'll give it a watch and let you know what I see.

I assumed that 24p was common on HDTV, but just now reading that it is rare! I'm not sure how to check the broadcast mode - my TV only says 1080p w/o the 24/50/60.

By the way, the only place now selling this unit is a single US seller on Ebay. He must read this forum (and your review), b/c he raised his price by $100 yesterday after noon. He's around $1300 now. Hoping Newegg gets some units in and extends the offer of $900 or $1000.
post #160 of 244
Quote:
Originally Posted by David44 View Post

I assumed that 24p was common on HDTV, but just now reading that it is rare! I'm not sure how to check the broadcast mode - my TV only says 1080p w/o the 24/50/60.

It really depends on your cable box - if it has a native passthru mode (like my FiOS box), it will just pass the channel at its native resolution. A lot of cable boxes don't have this feature and require you to choose an output resolution to which all channels are scaled. I can tell you how the projector performs with my box, but obviously there's no guarantee that will translate to another model box.
Quote:
Originally Posted by David44 View Post

By the way, the only place now selling this unit is a single US seller on Ebay. He must read this forum (and your review), b/c he raised his price by $100 yesterday after noon. He's around $1300 now. Hoping Newegg gets some units in and extends the offer of $900 or $1000.

I just took a look - if it's the same guy, he's now asking $1999 with a Buy It Now option, and he has 4 more available (with 4 already sold). Either way I think $2K is a lot to ask for this projector, and I agree that, in terms of features and performance, a $1K price tag is much more reasonable.
Edited by HogPilot - 7/9/13 at 1:31pm
post #161 of 244
Quote:
Originally Posted by HogPilot View Post

I just took a look - if it's the same guy, he's now asking $1999 with a Buy It Now option, and he has 4 more available (with 4 already sold). Either way I think $2K is a lot to ask for this projector, and I agree that, in terms of features and performance, a $1K price tag is much more reasonable.

Wow, that's the guy. Bumped his price $800 in 2 days... I guess he has a monopoly for the moment, but I can't see forking over $2k at this point in the product's life cycle.

Thanks for all your replies & comments! Please keep us posted.
post #162 of 244
Does Acer K750 have 1:1 pixel mapping?
post #163 of 244
Finally!!! After a month waiting and a DLP chip connector problem (that i have to fix myself) I´m enjoying my Acer k750! I also own a Viewsonic Pled W500 and let me tell you, the diference it´s HUGE!
1080P, great optics, uniform focus, very sharp, very fluid, full of settings, etc...
The thing that impress me the most was gaming, simply gorgeous!
Buying this thing for 900 bucks was the best thing i ever made (HT world, of course)!!!!
post #164 of 244
It now reads "Discontinued" on newegg, is there something better right around the corner?
post #165 of 244
Quote:
Originally Posted by Amber Ale View Post

It now reads "Discontinued" on newegg, is there something better right around the corner?

Hopefully... Optoma HD91? Acer K750-v2? Perhaps Monsieur Kraine will spot something in his travels this Fall. He seems to be way out in front on providing this site with new projector information.

But I doubt we will see anything 1080p LED/Laser that will hit the price point of $899 or $999 like this PJ did.
post #166 of 244
Came across the Optoma ZW212ST but it's $1600 WXGA (1280 x 800) and dlp.

Edit: The thing is 2500 lumens and looks full size. I'm guessing for $1600 it has a glass lens and no focus issues.

Edit: Found some more info here, short throw and more Link.
Edited by Amber Ale - 7/29/13 at 11:01am
post #167 of 244
I'm very happy with my acer k750, here's a cellphoto of "oblivion" (mkv)



About 1:1 pixel mapping, I don't know... can't figure it out, but trust me, really good PQ!
post #168 of 244
Very good picture Zoroastro , please do more .

not too much pictures in the net for this projector in action.

I have from april of this year the pa70g here in spain the price for this is about 1500 euros for the acer
no doubt about 1000 dollars is fantastic price for this projector

I am waiting for the next step I am a huge fan of led , no limits in use is a big thing for me.


Saludos
post #169 of 244
Quote:
Originally Posted by zoroastros View Post

About 1:1 pixel mapping, I don't know... can't figure it out
This link gives some info how to test for it: http://www.avsforum.com/t/1382091/jvc-rs-45-sony-hw30-benq-w7000-epson-5010-mini-shootout/2820#post_22170462
post #170 of 244
Quote:
Originally Posted by B-2Admirer View Post

Does Acer K750 have 1:1 pixel mapping?

It did when I hooked it up to my laptop. I haven't tested it with any video sources yet, I owe someone else here an answer about cable material so I'll take a look at it at that time.
Quote:
Originally Posted by B-2Admirer View Post

This link gives some info how to test for it: http://www.avsforum.com/t/1382091/jvc-rs-45-sony-hw30-benq-w7000-epson-5010-mini-shootout/2820#post_22170462

That was a procedure for a very specific problem. 1:1 pixel mapping can be easily determined with any number of test patterns that will show if there's any overscan in the projector.
Edited by HogPilot - 7/30/13 at 8:44am
post #171 of 244
Well then, would you be so kind as to test for that "very specific problem" which so many projectors seemed to have? No overscan doesn't always mean 1:1 pixel mapping, the latter should be defined as having each input pixel mapped to a single output pixel, so that any changes in it shall only be reflected in the output pixel it's mapped to, without influencing any neighboring output pixels. In other words, it means that a projector will attempt to display an image exactly as supplied from its input without any digital alteration done prior.

BTW, I assume you used HDMI when hooking it to your laptop. I mean, surely you didn't use D-Sub?
Edited by B-2Admirer - 7/31/13 at 3:57am
post #172 of 244
Quote:
Originally Posted by B-2Admirer View Post

Well then, would you be so kind as to test for that "very specific problem" which so many projectors seemed to have? No overscan doesn't always mean 1:1 pixel mapping, the latter should be defined as having each input pixel mapped to a single output pixel, so that any changes in it shall only be reflected in the output pixel it's mapped to, without influencing any neighboring output pixels. In other words, it means that a projector will attempt to display an image exactly as supplied from its input without any digital alteration done prior.

You'll have to bring me up to speed on which projector models exhibit the above issue. I've owned dozens of digital projectors and this is the first I've ever heard of this kind of problem. FYI, the term "1:1 pixel mapping" commonly refers to scaling only - or, more accurately, a lack thereof. However every signal absolutely goes through some sort of "digital alteration" between the time it enters the projector and the time it gets to the display panels even if it is not scaled - controls such as brightness, contrast, EE (sharpness), DNR controls, and any CMS controls (white balance, gamma, and gamut) alter the signal, not to mention YCbCr -> RGB conversion. What you've linked above is clearly some sort of fault in that processing. The end result would most accurately be described as "digital ghosting" since the image is properly mapped (i.e. unscaled), but then (and this is only a guess based on pictures of the issue and knowing how EE works) an EE algorithm is adding extra information to image boundaries.

Is there some reason why you expect that the K750 would exhibit this issue, or are you just asking that it be checked for because it's been reported on another model?
Quote:
Originally Posted by B-2Admirer View Post

BTW, I assume you used HDMI when hooking it to your laptop. I mean, surely you didn't use D-Sub?

That assumption would be correct.
post #173 of 244
HogPilot - could you please tell me where you read that the K750 has glass optics? Thanks!
Any issues or surprizes so far?
post #174 of 244
I honestly can't remember, however the image looks remarkably better than the plastic optics of my K330.
post #175 of 244
Quote:
Originally Posted by HogPilot View Post

Is there some reason why you expect that the K750 would exhibit this issue, or are you just asking that it be checked for because it's been reported on another model?
Asking because it has been reported on another Acer model.
post #176 of 244
1080p, all glass lens assembly, under 1k. I hope they come out with a replacement in Sept.
Quote:
Originally Posted by B-2Admirer View Post

Asking because it has been reported on another Acer model.

What model or is it all the led models?
post #177 of 244
Acer 9500DB.
post #178 of 244
I had a chance to play around with the PJ a bit more today, here's my further impressions and answers to some questions. I plugged it into my system and was feeding it video from my Oppo BDP-93 via my RadianceXE3D.

Firstly - and most surprisingly given that it's not listed in the manual - I fed the Acer 1080p24, and it seemed to accept it and play it just fine - the projector actually displays "1080p24, 23.97Hz" in the source info. When fed 1080p60 (2:3 pulldown of a 24p source), I noticed stuttering during credits; this completely went away when I switched back to 1080p24. I know this conflicts with previous reports, however my unit showed no issues in this area. Motion appeared to be smooth, I didn't notice any display-induced motion blur in any of my test scenes in Prometheus that I watched. In fact I was impressed with the motion resolution of the unit.

Black levels aren't bad, but there is some low-level noise in complete black that you can see if you're within a foot of the screen - standard DLP dithering type stuff. No big deal from normal viewing positions. After the projector warmed up, I noticed a slight lack of uniformity in sharpness from one side of the screen to the other, but this was only with test patterns and even then it took me a while to notice it. I had the gamma cranked all the way up as high as it would go both in the PJ and on the Lumagen, and didn't notice any of the edge artifacts that were asked about - 1 pixel wide lines were 1 pixel wide with no "shadowing" on either side. There is some minor CA, but it's mostly blue and completely unnoticeable unless you're right up at the screen.

I still didn't have a chance to feed it any 720p60 from a cable box, I still need to hook that up downstairs. Hopefully I'll get to that within the next week or so.
post #179 of 244
Quote:
Originally Posted by HogPilot View Post

I had the gamma cranked all the way up as high as it would go both in the PJ and on the Lumagen, and didn't notice any of the edge artifacts that were asked about - 1 pixel wide lines were 1 pixel wide with no "shadowing" on either side.
Thanks. I suppose this is a definite answer to my question.
post #180 of 244
Purchased the K750 from Amazon just before they more than doubled in price.

Casino Royale looked sharp plus no rainbow flashes during the opening scene which is in B&W / Sepia. It showed 24hz fed straight from a Sony blu-ray player.

HDTV baseball also looked very nice, but I think green (infield grass) was a bit strong. Not really concerning, and something I would not normally notice. Clearly a side effect of me reading too much in the AVS forum.

I had it running in "Movie" mode and it was ~14 feet from the wall giving me an enjoyable 108" diagonal image. Just as hoped, this projector appears to be a perfect TV replacement.
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