宏 H7550ST是一款定位于家庭影音娱乐的超短焦投影，其分辨率为1080P，采用单反级鱼眼镜头，可1.1倍变焦，1.5米可投射100寸影像，采用德仪0.65'DMD显示芯片，亮度为3000流明，对比度为16000:1，最大投影面积300英寸。宏H7750ST除了短焦镜头，还支持DST音效，内置两个10W功率的音箱，保证环绕效果。而且具有无线HD传输的功能，可以不用连接线，直接投影高画质的视频。支持2D转3D。

来自美国亚马逊网站买家点评(10)

Qiusheng Jiang 点评道：
2022-06-24 20:14:41
原文： The projector itself worths 5 stars for the price. The picture quality is great, and the short throw feature is great and I can easily project 150'+ screen.
The color is incredible and accurate. The built-in speaker isn't bad at all.
The noise is noticeable when get close to it but it's OK when hanging it on the ceiling. So far no issues found with the projector.

I only tried several 3D videos from Youtube using Chromecast and is working OK. You have to choose the correct 3D format though in Menu 3D settings like side-by-side, top-bottom. The default "Auto" option doesn't work an cannot detect the correct format of 3D source.

The reason for 3 star is because one pair of the glasses that come with the projector doesn't charge and is useless. I am contacting Acer customer service to see if the broken glasses can be replaced.

[Updates]
5-star for amazing Amazon Customer Service for helping out to solve the problem with the broken 3D glasses.
5-star for the projector as well. I've been using it daily ~2h per day for a week now and everything looks great!

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译文：
投影机本身价值五颗星。图像质量很好，短投功能很好，我可以轻松投射150'+的屏幕。
投影的颜色是难以置信的准确的。内置的扬声器还不错。当靠近它的时候，噪音是明显的，但挂在天花板上噪音还可以。到目前为止，投影仪没有发现任何问题。

我用Chromecast测试了Youtube上的几个3D视频，效果还不错。你必须在菜单的3D设置中选择正确的3D格式，像并行的，从顶向下的。默认的“自动”选项不起作用，无法检测到3D源的正确格式。

我打3星的原因是投影仪附带的一副眼镜不能够充电也没有用处。我正在联系宏的客服，看这副破眼镜是否可以更换。

(更新)
我打5星给亚马逊卓越的客户服务，帮助我解决了3D眼镜的问题。
5星打给投影仪。我已经连续一个星期每天使用它2小时了，一切看起来都很好!
Grant 点评道：
2022-01-08 09:07:06
原文： I originally bought the Epson HC2045 on account of its supposed great colors and absence of rainbow effect. While it was a great projector, I find the quality and volume of the built-in speaker lacking. This wouldn't have been much of an
issue had the device come with onboard Bluetooth. As I have a strong aversion to wires, adding a bluetooth audio transmitter and having to deal with its power cable was not an appealing solution.

That's why I ended up switching to an Acer H7550st instead. Initially I was hesitant because of the rainbow effect some reviews had identified, but this later was proven to be a non-issue - at least to my naked eyes, I haven't been able to spot any. What's more is that I find the picture quality and brightness exceed that of the Epson HC2040/HC2045. I am further impressed by the audio quality of the built-in speaker, rendering the need for connecting to a Bluetooth speaker rather unnecessary for my small apartment.

Pros:
- Great video quality and brightness
- Easy of installation
- A secret compartment that can easily fit in a Chromecast 1st Gen or Roku Stick
- Powerful speakers
- 3 HDMI
- Quiet
- 2D-to-3D conversion works extremely well
- Comes with two pairs of 3D glasses and carrying case

Cons:
- Lack of native Miracast/WiDI/Chromecast functionalities (come on, this is year 2015/2016)
- Remote control not backlit

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译文：
我最初购买爱普生HC2045的原因是因为它的色彩很好，而且没有彩虹效果。虽然它是一个很好的投影仪，但我发现内置扬声器的质量和音量都不够。如果设备自带蓝牙功能，这不会是个大问题。由于我对电线有强烈的反感，添加蓝牙音频发射器和处理它的电力电缆并不是一个吸引人的解决方案。

这就是为什么我最终改用宏H7550st。一开始我很犹豫，因为一些评论已经确认有彩虹效应，但后来证明这不是问题至少在我的肉眼看来，我还没有发现任何问题。更重要的是，我发现图片质量和亮度都超过了Epson HC2040/HC2045。内置扬声器的音质给我留下了深刻的印象，使我觉得我的小公寓不需要连接蓝牙扬声器。

优点:
-棒的视频质量和亮度
-易于安装
-有一个可以很容易装进Chromecast第1代或Roku Stick的秘密隔间
-强大的扬声器
- 3 HDMI
-安静
- 2d - 3d转换工作非常好
-配有两副3D眼镜和手提袋

缺点:
-缺乏原生Miracast/WiDI/Chromecast功能(拜托，今年是2015/2016年)
-遥控不背光
Matthew Deeney 点评道：
2022-11-20 06:06:27
原文： Love it. I will probably never buy another regular tv again. I mounted it, on the ceiling, with a universal mount that I bought from Amazon. I am also using a portable(84 inch) screen that I bought from Amazon. We just tacked the screen t
o our wall. It was easy to adjust the picture to the screen. The projector could be even closer to the screen and produce just as large of a picture, but I wanted to secure it to a joist(stud). The short throw feature allows it to be out of the way of people walking in front of the picture. The picture is awesome. The colors are really bright. It even looks good with all of the lights on. The speaker is good, but I use the Bluetooth to connect it to the speaker bar, which works great. I'm really happy that I bought it. Later!

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译文：
爱死它了。我可能再也不会买普通电视机了。我把它装在天花板上，用的是我从亚马逊买的通用支架。我还在使用我从亚马逊买的便携式(84英寸)屏幕。我们只是把屏幕投影在墙上。把图片调整到屏幕上很容易。放映机甚至可以离屏幕更近，产生同样大小的画面，但我想把它固定在一个搁栅(螺柱)上。短投功能可以避免人们走在投影前面。这张照片太棒了。颜色很鲜艳。在所有的灯都亮着的情况下，它看起来还不错。扬声器不错，但我用蓝牙连接到扬声器栏，效果很好。我真的很高兴我买了它。
B. Phil Howell 点评道：
2022-05-07 09:22:50
原文： This projector is definitely an excellent purchase! We use this projector for showing presentations and for TV at home.

Quality: We have tested every input with combinations of a Surface Pro 4, Fire TV, Roku, Blu-Ray and OTA
Live TV. The picture quality is absolutely amazing! It takes just a few minutes and the brightness is at it's fullest. The images from all the blu-rays are amazing at the size we are projecting. We had our doubts when we used a HomeWorks box to convert the coaxial for OTA to HDMI for live TV. We ended up watching the Super Bowl and it was absolutely flawless. We couldn't ask for anything more...

Display Size: I did not fully understand how well the Short Throw feature works. After getting the projector, we were able to have a movie night at our church and display an 80 inch blu-ray movie from 3-5 feet away. We sat it on a table about 2 feet off the ground and angled it up. At that distance, it showed great.

Sound: To have contained speakers, the speakers are great. I don't think you will find contained speakers that do sound that well. They are not home theater quality, but definitely better than what you would expect coming from the actual projector itself.

Noise: I have found that even using the projector for 8 hour presentations, that I do not hear the sound of the fan from the projector. Even when it is quite in our home, there is very little noise coming from it.

Settings: There are a ton of settings in this projector. Most of them are only accessible if you have nothing hooked up. If you hook up anything and press menu, it will give you the majority of the settings. But if you unplug all devices, press menu, then you will get a nice grid and a menu with all features. There are a lot and should allow you to adjust to your room and location.

Key-stoning: This projector comes with two key stoning features (that I know if). It comes with Auto-Keystone turned on and it does an amazing job. Even when we place it less than two feet off the floor and point it to 7 feet off the floor, it corrects itself immediately to the right spot. 9 times out of 10 it is correct. It's when I let the leg out to raise or lower it just a bit, it throws it off. We just raise it by hand and set it back down and it corrects itself. The manual keystoning works as well by remote and is quick to adjust.

Lens Rings - You have two adjustments from the top of the projector for the lens. A small zoom that depending on how far you are back from the screen, will throw or shorten the screen by a foot or two.

We have not had time to test the 3D function, hopefully we will when/if we permanently mount the projector.

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译文：
这台投影仪绝对是一个很好的购买!我们用这个投影仪在家里做报告和看电视。

质量:我们用Surface Pro 4、Fire TV、Roku、蓝光和OTA Live TV的组合测试了所有输入。画面质量绝对令人惊叹!只需要几分钟，亮度就达到了最佳状态。我们正在投影的由所有的蓝射线组成的图像的尺寸是令人惊喜的。当我们使用一个家庭作业箱将OTA的同轴转换为HDMI用于电视直播时，我们产生了疑问。我们最后看了超级碗，它绝对是完美的。我们不能再要求更多了……

显示大小:我对短焦投影如何工作不是很理解。收到投影仪后，我们可以在教堂里看一晚上的电影，并在3-5英尺远的地方放映一部80英寸的蓝光电影。我们把它放在离地面约2英尺的桌子上，把它倾斜起来。那个位置的投影效果很好。

声音：音箱的效果很棒。我以前认为送的音响效果都不好。它们比家庭影院的质量差些，但肯定比你预期的投影仪本身的音响的效果要好。

噪音:我发现即使我使用投影仪8小时，我也听不到投影仪发出的风扇声。即使它在安静的家里也很少有噪音。

设置:这个投影仪有很多设置。它们中的大多数只有在你没有任何连接的情况下才可以访问。如果你连接任何东西并按下菜单，它会给你提供大部分的设置。但是如果你拔掉所有的设备并按下菜单，你会得到一个很好的网格和一个菜单的所有功能。这里有很多功能，应该能够适应你的房间和位置。

键石:这个投影仪有两个键石功能(如果我知道的话)。它配备了自动基石打开的功能，是一项惊人的工作。即使我们把它放在离地面不到2英尺并把它指向离地面7英尺的地方，它也会立即调整到正确的位置。10次中有9次是正确的。当我把腿伸出来抬高或降低一点点的时候，它就会把它甩下来。我们只是用手把它举起来放回原处，它就会自我纠正。手动按键也可以远程操作，调整速度快。

镜头环-你有两个来自投影仪的顶部的镜头的调节器。一个小的变焦，取决于你离屏幕有多远，会把屏幕抛出或缩短一到两英尺。

我们还没有时间测试3D功能，希望我们会测试/如果我们永久安装投影仪的话。
JOSE A BELTRAN 点评道：
2022-02-13 00:33:07
原文： Amazing everything working perfect, 3D looks better than the movie theater by the way Nvidia vision glasses don't work with this projector, but 2 pairs of 3D active glasses are included and they are not so expensive if you want to get mo
re.

Very very happy with my projector

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译文：
令人惊讶，一切工作都很完美，3D看起来比电影院更好，顺便说一下，Nvidia的视力眼镜与这个投影仪不匹配，但包括的两副3D活动眼镜是匹配的，如果你想要得到更多的体验，买过来也不是很贵。

能够买到这个投影仪非常高兴。
clint tworek 点评道：
2022-11-28 02:23:47
原文： so far so good
译文：到目前为止是好的。
carldell dedeaux 点评道：
2022-04-04 03:08:59
原文： very great for the price. good colors and sharpness
译文：价格很好。色彩和清晰度都很好。
Mohanad Hejazi 点评道：
2022-02-07 17:59:59
原文： Very good quality
译文：质量特别好。
Dennis Comet 点评道：
2022-10-09 02:02:04
原文： Great projector, Clear bright image.
译文：投影仪很棒，图像很清晰。
Joshua Colcord 点评道：
2022-07-14 06:12:34
原文： The picture looks great and it was easy to get set up even in the not ideal place that mine has to be.
译文：画面看起来很不错，即使是放置在不理想的地方，投影出来的效果也很好。