The Epson TW8300 ($2,699) and the Optoma UHD660 ($2,499) are two very unique and outstanding home theater projectors, both offering support for 4K and HDR and impressive images with rich colors and outstanding contrast. quality. However, beyond that, they are two very different machines with different sets of features. For example, only the TW8300 supports full 3D. On the other hand, although all provide frame interpolation, only the UHD660 allows you to use frame interpolation at 4K input or 1080p. For you, the best choice depends on which features are most important to you.
The key difference between TW8300 and UHD660
4K DLP chip vs. Epson 4K enhancement. Many of the differences between the two projectors stem from their respective imaging technology. The 4K UHD DLP chip enables the UHD660 to provide true 3840x2160 pixels. The 1080p 3LCD chip and Epson's pixel-shifting 4K enhancement technology make the TW8300 less pixel-heavy on the screen. However, it produces much more pixels than a standard 1080p projector. As far as the human eye is concerned, its resolution level is already high enough. For the immersive image, the difference with the 3840x2160 is hardly seen. The difference is more pronounced in text or photos, but this is not the real purpose of the two projectors.
Lens. Because the 4K enhancement technology is cheaper than the 4K DLP chip, Epson can add some expensive features to the TW8300, and the price is still the same as the UHD660. The highest ranking is the 2.1x zoom lens with all-glass and 16-lens lenses. According to our observations, the TW8300 actually exhibits more precise details. Its lens is superior to the UHD660 but is not an outstanding 1.6x zoom lens, providing better optical quality.
Wide range vs. moderate lens shift. The TW8300 offers horizontal and vertical lens shifts. As with other Epson models, the two shift ranges are the largest ones you can see on a home theater projector. UHD660 has a certain vertical shift, but the range is much smaller. It also lacks trapezoidal correction. This combination makes the UHD660 much less flexible than the TW8300 in terms of projector installation location.
Manual vs. electric lens. The TW8300 offers motorized focus, zoom, and lens shift, which are manually adjusted on the UHD660. It also provides a lens memory function that can store up to 10 lens position combinations. This is a great advantage if you want to build a constant image height system and avoid the overhead and hassle of using anamorphic lenses. The 2.4 format, 16:9 format, or any other aspect ratio can be simply switched by selecting the stored settings.
3D video. The TW8300 offers full 3D support, although it is limited to 1080p and RF glasses. The UHD660 version we tested did not support 3D at all. The promised firmware upgrade (scheduled for November 2017) will add 3D, but it is only for 30Hz 1080p computer input.
Upswing. The UHD660 upconverts all input to 2160p and allows you to apply all image processing options to any input. The TW8300 automatically turns on 4K enhancements for the 2160p input, but provides a 4K enhanced menu option for 1080p signals. When 4K enhancement is turned on, you cannot use the TW8300's frame interpolation function.
Quality
The difference in relative image quality between the two projectors depends on whether the input signal is 4K HDR, 4K SDR, or 1080p SDR.
Image sharpness. The TW8300 has slightly different image sharpness for these three types of input signals. However, the importance of sharpness varies with the details and the overall image quality. It is the most important for 1080p and the least important for 4K HDR.
Based on the specification, the resolution of the UHD660 is higher than that of the TW8300. Its DLP chip can produce all 3840x2160 pixels or 8.3 million pixels on the screen. The TW8300's 1080p chip plus pixel shift produces far fewer pixels than this, even though it looks similar to the human eye. Despite this, there is a difference between the resolution specifications and the ability to resolve details. The TW8300's ability to handle details is better due in large part to its higher quality lens, although its video processing (super resolution and detail enhancement) may also play a role. Incremental advantage is mainly reflected in the extremely small details, and these details are so small that if you do not look for it, you probably won't notice them. At 4K input, its fine details are slightly more pronounced than the UHD660. When 1080p signal input, you can hardly see the details on the UHD660, which is more clear in the TW8300.
In the end, the TW8300 has a few advantages in video detail resolution, but it is not easy to compete with the UHD660. Doing a little better than UHD660 is an extraordinary achievement. For 4K and 1080p SDR inputs, image sharpness gives the TW8300 a subtle overall advantage if you don't count on the limitations of its FI. However, other factors are even more important for 4K HDR input.
4K+HDR: For the 4K HDR, the UHD660 is the stronger of the two. Its factory setting can provide a very worthwhile 4K HDR picture. The same is the default setting for both models, the UHD660 is much brighter than the TW8300, and the shadow detail is much better separated. What's more, if you make some changes to the HDR, they will be saved in the color mode and will automatically switch when the UHD660 detects the HDR input.
Another advantage of the UHD660 is that you can make full use of all the video processing functions including frame interpolation. The TW8300 doesn't allow you to use its FI or noise reduction features with 4K input - with or without HDR. If high-quality HDR ranks highest in your priority list, then in short, the UHD660 beats the TW8300.
SDR: Whether 4K or 1080p SDR video, the TW8300 performs better than the UHD660. The sharpness of the image is a little bit higher; its color is equally saturated, bright and eye-catching; it also provides deeper blacks. By using the default settings of the color preset mode to perform AB contrast on the images of the two cameras, the darkest black mode of the UHD660 is still inferior to the blackest mode of the TW8300 black.
The factory default settings for most color modes of both projectors are good enough if they are not compared to other machines. The only exception is the brightest mode of the UHD660, which is too green to ignore. The UHD660's other modes of green are also biased, but small enough that many people are not aware of it. The situation is similar for the TW8300, but its default setting is more neutral in color, and this difference is apparent in the side-by-side comparison of the two machines. More importantly, both provide rich menu options for adjusting colors, but I have found that UHD660's menus are easier to use.
For the SDR input, in short, the UHD660 and TW8300 have equal quality in terms of image quality. The TW8300 offers deeper blacks, slightly better sharpness and slightly more accurate factory settings. The UHD660 allows you to use all of its video processing functions, especially in 4K input and FI up to 4K. At least for me, the UHD660's menu logic for adjusting colors is simpler.
Performance comparison
Brightness: The comparison of the brightness of DLP and LCD projectors is often misleading because you have to take into account that DLP's extreme color features are more often used to increase white brightness than color brightness. This is not the case on the UHD660. Extreme Color is a menu option that is set to 1 (off) to 10 (highest), and the default for most color preset modes is 10. However, all color preset modes of the UHD660 are configured to be close to the highest value of white luminance and color luminance, with the exception of one mode. The exception to this is Bright Bright mode, which has a color brightness of only 75% of the white brightness. In other color modes, the default setting can produce a color brightness that exceeds 90% of the white brightness, and the brightness of a color image is basically the same as an LCD-based model with the same white brightness. This allows us to measure the ANSI lumens close to the color brightness values ​​of the two models, making it easy to determine their relative brightness in home theater applications. All measurements are made at the maximum wide-angle setting of the zoom lens.
The Epson models we have seen recently have lumen readings that exceed the nominal values, and the TW8300 is no exception. Epson nominally 2500 lumens for the TW8300. We measured 3527 lumens in its brightest mode. The bright theater mode, with good color fidelity, approaches its nominal value, reaching 2410 lumens.
It is important to note that the lamp power setting is different in the factory default setting for each color mode. For example, bright theater mode, the default setting is Medium. However, you can set any color mode to any power level. Readings of ANSI lumens at High, Medium, and Eco power are as follows.
Epson TW8300 ANSI lumens
Mode High Medium Eco Dynamic Bright Cinema Natural Cinema B&W Cinema Digital Cinema
The nominal value of the Optoma UHD660 is 2200 lumens. We measured 1717 ANSI lumens in its brightest mode, which is 2217 lumens based on the center point alone. The ANSI lumen measurement is usually lower because it is the average of 9 points, not just the center point. So it takes into account the brightness changes across the screen.
The UHD660 has two light bulb settings ― Bright and Eco. It also has a Dynamic Black setting that allows brightness adjustment based on the current image content, much like a dynamic aperture. This feature is turned on by default, so you cannot switch to Eco power mode unless you turn it off. It also reduces Bright's bright power mode brightness by 1% to 2%. Shown below is the ANSI lumens value when the Dynamic Black is off.
OPTOMA UHD660 ANSI lumens
MODE Bright Eco Bright 1717 1178 Cinema 960 659 Vivid 1149 788 HDR 821 563 Game 1067 732 Reference 701 481
The loss of brightness of the zoom lens. Like most zoom lenses, the lenses of the TW8300 and UHD660 reduce the brightness at the telephoto end of their zoom range compared to the wide-angle position. For the TW8300's 2.1x lens, the brightness loss at the telephoto end was 33%. For the UHD660's 1.6x lens, the loss is 27%. In both cases, the loss of brightness is enough to allow you to consider where the projector is installed. For maximum brightness, you need to place the projector as close to the screen as possible, that is, the lens is set to the wide-angle end of the zoom range. Eco mode. The TW8300 offers two low-power modes: Medium, which reduces brightness by 23%, and Eco, which lowers the brightness by 2%, or 25% compared to the High mode. The UHD660's Eco mode has a 31% reduction in brightness compared to the bright mode.
Brightness uniformity. TW8300 measured 93% of the brightness uniformity is very good, is already the ultimate digital projector. On the other hand, the UHD660 presents a 59% uniformity that is relatively weak for a home theater projector and is easily seen in pure white or light-colored images. Fortunately, the images of most video images are separate objects, masking the defects of uniformity. Because you don't know how bright a portion of the picture is relative to other parts, the image on the screen looks uniform.
Rainbow effect. The 3-chip design of the TW8300 does not produce a rainbow effect. All single-chip projectors like the UHD660 rely on fast continuous color information refreshes, so they all have the potential to produce a rainbow effect. In general, they are occasionally noticed on the UHD660, but the frequency of occurrence is small enough that there are almost no people, and if they do, they will feel annoying.
Airborne audio. The TW8300 does not support on-board speakers and must have an external audio system. Of course, in a home theater, you will want to match a high-quality sound system for any of the two machines. However, the UHD660 boasts excellent on-board audio for projectors, with two 4W speakers built into it, each with its own separate air filter on the rear panel. This is useful if you want to use the projector in a backyard movie night or similar scene.
Input delay. We measured the input delay of the TW8300 in the 4K enhanced open (FI can only be turned off) to 28ms. When 4K enhancement is turned off, the measured delay is 29 ms when FI is OFF, 68 ms when FI is Low, and 104 ms when FI is Normal and High. The UHD660 is 74ms when the FI is turned off, and any level is 141ms when the FI is turned on. All measurements are based on 1080p input signals.
Fan noise. The nominal value of the Epson TW8300 in High mode is 31dB, which makes it easy for anyone to sit next to the projector when quiet. Medium and Eco modes will reduce the noise to a level that is hard to hear in a quiet room. The nominal value in the Epson Eco mode is 20dB, and the Medium is not so high.
The nominal value of the Optoma UHD660 in Bright mode is 28dB, and in the Eco mode it is 25dB. This is consistent with the results we observed. Both modes are quieter than the TW8300 High mode, but not as good as the Epson projector's Medium mode. Eco mode is so quiet. In either mode, if you are near the projector when quiet, the noise is obvious, but if you are in a few feet away it will not be.
Last thought
Both the Optoma UHD660 and the Epson TW8300 provide excellent value for the features they provide. They have excellent image quality in projectors in the price segment near $2,500, thanks to their 4K capabilities, proper dark levels, and rich, vibrant colors. However, since they are so different, you need to choose between them based on their respective set of features.
The Epson TW8300 has many features that the UHD660 lacks, the most notable being the horizontal lens shift; the much larger vertical movement range; trapezoidal correction; slightly larger zoom range; and power zoom, focus, and lens shift. Therefore, the TW8300 is more flexible than the UHD660 in terms of the installation position and the convenience of electric control. In addition, you can also save the settings of the three lenses in combination, and restore each setting with a single command. This is particularly appealing for those who do not use anamorphic lenses to build a constant image height system. For 3D fans, the TW8300 has Full HD 3D. And it provides a deeper black level and slightly better sharpness.
The key strategic advantage of the Optoma UHD660 is its excellent 4K HDR. Even with the default settings, it provides an HDR image quality that has exceeded the "acceptable" level, and any adjustments you make to improving the HDR effect will be saved and will be automatically loaded each time it detects an HDR input. . None of these TW8300s have. The UHD660's extremely well-performing frame interpolation system in both 1080p and 4K is also a major feature, especially when the TW8300 is unable to start frame interpolation on 4K input.
The bottom line is that the overall image quality of the two projectors is evenly matched, but each has some characteristics that are better than the other. Choosing between the two depends entirely on which features you care about most.
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Engine Model
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190F(E)
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Single cylinder,four-stroke,air-cooled, OHV
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Recoil/ Electric start
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Ignition System
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Bore 'Stroke(mm)
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90*66
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440
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1.1
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≤374
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61
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106
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10.2:1
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6.5
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Max.Power(kw)
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7
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25
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88
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65
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Engine Model 01
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1-74-D
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Engine Type
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Single cylinder,four-stroke,OHV
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Water-cooled
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Ignition System
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Electric start
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90*66
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300
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10.2:1
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9
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8.5
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8000
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3800-5500
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1.1
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40 - 80
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30 - 120
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12
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75
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80
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