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Home Theater Guide webboard => มุม โฮมเธียเตอร์ (HT) => ข้อความที่เริ่มโดย: Help !!! ที่ 23 กรกฎาคม, 2005, 06:44:39 am
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ชอบภาพของ optoma มากกว่า แต่ติดที่ optoma เป็น 576p แต่ benQ ได้ 720p มันจำเป็นมากน้อยแค่ไหนครับในเรื่องนี้ ในเมื่อมันต่างกันแล้วทำไมผมถึงได้รู้สึกว่าภาพของ optoma สวยกว่าครับ ขอบคุณมากนะครับ
baitong baitong36@yahoo.com
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ผมว่าลองไปนั่งดูทั้ง 2 ยี่ห้อ และนั่งดูนานๆครับ อันไหนชอบซื้ออันนั้นน่าจะดีที่สุดครับ
ถ้าเลือกได้ หา 720P น่าจะดีกว่าครับ Optoma H77 ตัวนี้เคยดูมาสมัยก่อน ภาพก็สวยดีนะครับ แต่ตอนนี้ตกรุ่นไปแล้ว
ส่วนตัวผมว่าทั้ง 2 ยี่ห้อ คุณภาพก็ไล่ๆกันครับ
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i am seller
Selecting a Home Theater Projector:
Should you go with 480p, 576p, or 720p?
http://www.projectorcentral.com/choosing_resolution.htm
Comments on BenQ PE8700, Optoma H77, Toshiba MT800
Evan Powell, July 29, 2004
http://www.projectorcentral.com/comments_hd2+.htm
Which home theater projector is for you?
Projector Comparison Overview
Last month I reviewed the BenQ PE700 DLP projector and awarded it our HOT PRODUCT AWARD for its combination of image quality, features, performance and value. The first of the Hi-Def (1280x720)DLP home theater projectors that can actually be found for under (LCdprojectors cost less for the same resolution, but generally DLP's rule.)
Toshiba also started shipping their MT700 projector, and, while these two projectors are virtually identical, each manufacturer touts different advantages.
So the questions become:
1. Which one is better or even is one actually better than the other
2. Which should I buy?
A few days ago I was finally able to shoot out the BenQ 7700 home theater projector, side by side with the Toshiba MT700 projector. I am able to simultaneously feed them the same source material. on my old double wide 16:9 (matte white Stewart screen - which I had ordered for exactly this purpose)
To start with, BenQ builds both projectors. To look at them they are nearly identical, with only the slightest cosmetic differences (I prefer the BenQ's look - a touch more striking - , but you may not.) Both are whitish cases with some silver trim. Truth is, who looks at the projector - especially with the lights down?)
Now from their literature, BenQ says that for processing the image, they have their SensEye technology, which handles all kinds of things - enhancing contrast, eliminating artifacts, de-interlacing, etc. By comparison Toshiba talks of using the well known Faroudja technologies inside their version.
The other difference (at least it was speculated), was that Toshiba is using a Zeiss lens (they used Zeiss on a previous model that was OEM'd from InFocus). BenQ doesn't mention the lens manufacturer.
So which projector performs better?
We fed them both 480i and 480p from a Sanyo DVD player, and also 1080i from my D-VHS deck. I can say right off that the projectors did a much better job of de-interlacing than the DVD player, so unless you have a really super-duper DVD player in terms of de-interlacing, you are probably better off feeding your projector a 480i signal than a 480p. Let the projectors - which spend more money on the electronics, do the work and give you the better image.
We ran AVIA pro test suite on them (part of it), and also Faroudja's test disk.
What we found: The projectors
1. Have the same lens (at least we could find no visible difference in the element mounting, by visually viewing it.
2. Almost certainly have the same circuitry inside. The Toshiba claims Faroudja (we believe them - or Farjoudja would have their lawyers all over Toshiba).
We could not find one visible/measureable difference on any test we threw at them. Even on the Faroudja disk, which legend has it, favors Faroudja based machines, the results were identical on every test we tried.
3. They both have 3:2 pulldown
4. Color balance out of the box were slightly different as were the preset modes, however the differences were extremely minor, and any basic calibration should make them look the same.
5. Both have handy picture quality presets (ie. the BenQ has Cinema mode, Home Theater Mode, Family room mode, etc. Toshiba also has modes but I had the Toshiba briefly, and can't recall exactly what they all were called (Theater, Standard....?) None of these modes seemed to match up perfectly, so you can say that they each picked out slightly different default settings for their modes). Once you calibrate, this becomes a non issue, other than convienence. Both have plenty of User savable settings.
6. Menus were virtually identical in terms of options, for example both offer a menu that allows adjustment of Red, Green, Blue, YELLOW, and White - (normally you don't get a yellow control on projectors - another reason to suspect they have the same stuff inside).
7. Light leakage out the front - Unfortunately no point was made to look for differences. However, we were working the projectors in an otherwise pitch black room with white walls. As a result any light leakage around or on the screen should have been noticeable - none was seen. (That doesn't mean that tiny amounts of light aren't escaping from various vents or even the lens, but if you can't notice it affecting your viewing experience, it's a non-issue.
8. Both projectors offer PIP (picture in picture), and "POP" Picture On Picture - POP actually lets you put two identically sized images side by side on the screen - that's right - if you have the sources, you can have to large football games going at once, or view a movie while projecting a browser so you can surf the internet.
So, what's the performance difference between SensEye on the BenQ projector and Faroudja on the Toshiba?
None, that could be detected. Therefore, my belief, is that both are using the same circuitry; Faroudja, but that Toshiba wanted to take advantage of the Faroudja name, while BenQ wants to build the "brand" for its SensEye (which they also use in their LCD display products.) Whether or not my conclusiion is accurate, I don't expect either manufacturer to confirm or deny. (I will however, ask them!) But the bottom line, is, in a side by side projector comparison, we couldn't detect any projector performance differences.
If my speculation is correct, then the real differences (not in any particular order) to you, the buyer are:
Warranty
Cosmetics
DOA and Service policies and procedures from the manufacturers
Manufacturer tech support
The dealer you are buying from
Final price
So WHICH HOME THEATER TO BUY?
That's your call. Pricing is almost identical (forget list prices). Typically the BenQ sells for slightly more, but has these advantages (but none in actual image quality).
The BenQ comes with a 3 year warranty, and Benq will replace your unit immediately with their replacement program during the entire first year.
BenQ's direct dealers will (replace an initially defective unit during the first 30 days after purchase. (this according to BenQ and one dealer I am familiar with).
BenQ has an excellent reputation for tech support (which hopefully you won't need). I cannot comment about Toshiba's having no experience. ( I have a BenQ PE8700+ hanging in my home theater, and have spoken with them often.)
The Toshiba has a two year warranty instead of three. Mike - the local custom installer who brought over the MT700 for the projector shootout, and ran the tests from his test disks), advised that when he received a defective projector from Toshiba (new) he was instructed to overnight it to Toshiba for repair and it was then returned, instead of simply being replaced with another brand new projector as BenQ would do.. (Toshiba pays the freight.) Toshiba does not have a replacement program during the first year.
Now from my standpoint an extra year projector warranty is well worth the $100-$250 street price difference, because if you do have a real problem in year three that could easily cost you $1000 or more. Almost any major projector repair out of warranty, will be expensive enough that you will likely decide to toss your projector and replace it with a newer projector.
Therefore I would recommend the BenQ projector of the two, but an alternative would be to purchase an extended warranty for the Toshiba. (That would almost certainly make the Toshiba the more expensive home theater projector.)
Was everything tested? No. The projector shoot out lasted about 90 minutes and many tests were run, as well as viewing parts of Star Wars - Revenge of the Clones, Fifth Element (superbit version), and the Over America Hi-Def 1080i D-VHS tape (on a JVC DVHS deck).
No testing was done on HDMI inputs, but nothing visible in any of the other tests would lead us to believe that there would be a difference there. I will be inquiring of the two manufacturers if there is a difference, but I don't expect either to provide conclusive information
BTW their was one menu item difference we did notice, the Toshiba MT700 projector has an RGB gamma adjust the BenQ home theater projector lacks. That said, it is not a feature you would use with a normal calibration. The same capability is likely hidden in the BenQ projector's service menu, which a professional calibrator (and they charge money!) might use, but that same person would know how to access the service menu. Since there were some differences in the menu layout, there may have been a couple of other differences too, besides the names and number of preset modes, but if there's a difference that matters, we couldn't find it.
Summary:
These two projectors are essentially performance identical. Forget the hype (SensEye vs Faroudja inside) The BenQ costs a few bucks more, but comes with a longer warranty, and better service/support programs (including a first year replacement program).
Cosmetic differences are there, but minor, and I remind everyone, you can't see the projector in a dark room!
I would therefore recommend the BenQ PE7700 projector over the Toshiba MT700 projector, unless you can find the Toshiba for SEVERAL hundred dollars less, and the pricing differences today seem to be far less than that.
Home Theater - Capsule (short) Review: Optoma H57 Projector
When I received the H57 a couple of weeks ago to review (same day I got in the BenQ PE7700), I looked forward to reviewing the H57, but was put off by the price. With the understanding that this 1024x576 resolution DLP had a dealer cost only a few dollars below the highly anticipated PE7700, I was sceptical whether there was a market for it. So I decided to keep the review short.
However I spoke with Optoma the other day, and learned that they have drastically reduced the price of the H57, which should give it an online street price close to $2000. That means that the H57 now competes price wise against the Panasonic AE700u, the Sanyo Z3, the InFocus SP5000, BenQ 7800 (discontinued) and the NEC HT510 (all reviewed on this site, except for the SP5000). And that changes everything!
So let's get started with this relatively (for me) short, but sweet review.
My first observation to share with you, is that if you want to enjoy the advantages of a DLP home theater projector (compared to the LCD projectors), around the $2000 price point, this Optoma home theater projector is certainly worth seriously considering. Also, in my opinion, it outperforms the NEC HT510, the only other current DLP competition of this resolution that I have reviewed.
The H57 projector uses the DarkChip2, which if I understand this correctly, is an improved version of the older Matterhorn 1024x576 chip. It allows the H57 to claim a 3000:1 contrast ratio, the highest I've seen of any DLP projector not using the DarkChip3 (and those projectors start around $6000 street price).
The H57 has plenty of brightness! (It's rated 1100 lumens.) From where I place it for testing, it could not fill my 140" screen, it only put up an image from that distance of about 124" diagonal. But at that size it was easily significantly brighter than my BenQ 8700+ (doing the full 140".) I suspect that if tested, it is a little brighter than the BenQ - helpful for those with some ambient light to deal with.
Color saturation was exceptional. Yet natural. I don't know what Optoma has done with this projector, but it offers as good a color saturation as I have seen from an under $10K DLP projector.
This home theater projector claims 1100 lumens, and a 3000:1 contrast ratio. I did not see any improvement in black levels compared to my 8700+ despite the higher claimed contrast, but that said, the picture looked great.
To look at the "box" the Optoma is a pretty basic looking off white projector. It won't knock your socks off if you are looking for a sexy looking projector, but then, most of us only care about how good the image looks.
Highlights of the Optoma H57 widescreen DLP Projector
Besides the great image quality, which I will discuss later, consider:
Quiet - in full power this Optoma projector claims an exceptionally quiet 28db noise level (in lowest power mode - 23 db - for all practical purposes silent operation)
No issue with any light leakage
Lots of options to save your preferred settings (5 separate user settings for each input!) note: that's probably overkill.
Picture in Picture, with Swap (switches larger image with smaller one)
Inputs, Inputs, Inputs - Not only does the H57 projector have component video inputs, but DVI, and computer inputs both support component video sources. This makes this perhaps the most flexible projector out there, and if you don't have an AV receiver that can switch component video this can be a huge plus, since you can have up to 3 component video sources hooked up at once!
An optional short throw lens attachment (0.8) lets you place the projector 20% closer than the standard zoom lens allows.
The zoom lens is fairly long throw, ideal for many who would like to shelf mount the projector in the back of their room (if it's not too deep), instead of ceiling or table mounting. Take your screen width x 1.87 for the furthest back you can place the front of the projector. (ex. 110" diagonal screen is 96" wide x 1.87 = 15 feet)
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ตอนนี้ แวะชมได้ที่ e-square ชั้นที่ 1
ร้านparadise โชร์ benq7700 +ต่อ DVDO หรือเลือกสลับกับlumagen
ร้าน SAVE โชร์ optoma h-57 +ต่อ DVDO หรือเลือกสลับกับlumagen ได้ทั้ง 2 ร้านต่อสลับกันได้
เช่นเดียวกันครับ
ถ้ายังไงมาหาจิต พาไปชมทั้ง 2 ร้านได้ครับ คงต้องแล้วแต่ความพอใจ
ส่วนชั้น 3 ก็มี magnet อีกร้าน ชั้น 2 ก็มี movie ครับ เดินครั้งเดียวครับ
ยินดีครับ