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Optoma ML750ST Review

PROS / The ML750ST has phenomenal image quality for a mini projector.

CONS / No Bluetooth audio support means you need hardwired speakers when presenting to large groups.

 VERDICT / The Optoma ML750ST’s best-in-class performance and stellar construction make it an excellent centerpiece in your home theater or boardroom.

As you make the leap from a traditional TV to a mini projector there are a few things to consider, chief among them is something unique to the platform: the throw ratio, or the distance the projector is from the screen versus the size of the projected image. This can be difficult to navigate if you’re working in a small or unevenly lit viewing environment. As one of Optoma’s best mini projectors, the ML750ST benefits from its short throw, as well as its other strong specification. Thanks to its combination of stellar build quality and equally consistent image fidelity, the Optoma ML750ST earns the Top Ten Reviews Gold Award.

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  1. Weight of the projector
    Less is better
  2. 1 Optoma ML750ST
    0.8 pounds
  3. 1.9 pounds
  4. 0.8 pounds
  5. Category Average
    0.96 pounds

Picture Quality

The Optoma’s specifications make it a good choice for both home and business users. The projector touts a native resolution of 1280 x 800 pixels and can upscale video content to 1080i. In our benchmarking, the ML750ST justified its high-end billing with its best-in-class marks in our color accuracy and comparative brightness tests. The projector produced a Delta E value of 6.7 in our color accuracy test. Delta-E indicates how accurately a projector reproduces a spectrum of colors and is measured using a colorimeter – the closer the Delta-E is to zero, the better.

The Optoma is an LED projector, but its picture quality is in line with the laser-based projectors we evaluated, which produced colorimeter readouts of 9 to 13 in the same test. Laser projectors generally have better image fidelity than LED projectors because they have more efficient lighting technology, so the ML750ST’s competitive score in notable.

Its excellent benchmark performance was confirmed in our hands-on testing. We used the Optoma to view a variety of high-definition content in dark environments and those with ambient light, and image quality was phenomenal in both settings. Fine onscreen details were rendered in clear focus, and even on high brightness settings, color levels remained consistent and didn’t appear washed out.

The ML750ST’s short throw ratio of 0.8:1 also contributes to its pristine image quality. Short throw projector like the Optoma don’t need to be as far away from the display surface as typical projectors – many of which sport throw ratios in the 1.2:1 to 1.5:1 range – to project a large image. For example, you only need to place the projector 4 feet away from a surface to produce a 6-foot image. A short throw can be difficult to work with if you are using the projector in a small room, but it’s a significant bonus for home and business users who want a deluxe-size viewing screen.


The ML750ST has pretty standard connectivity options, although it also has an integrated document reader, which is useful in office settings. You can display common file formats, such as PDFs and DOCs, from a USB thumb drive, so you don’t need to a connect to a laptop.

The Optoma houses its ports on its backside, and the selection includes HDMI, USB, 3.5mm audio output and a microSD slot. As with most business-centric pico projectors, the Optoma doesn’t support Bluetooth devices or out-of-the-box wireless mirroring, which is an inconvenience for home users. For that functionality, you have to purchase the optional USB dongle from Optoma.

Build Quality

The Optoma’s exceptional hardware suits its outward design. It’s one of the smallest projectors we evaluated, sporting dimensions of 4.1 x 4.2 x 1.5 inches and a weight of 0.8 pounds. Its vented black siding complements the durable white plastic on the top, and an adjustable leg on the bottom lets you adjust the projection angle for large screens.

During long test sessions using the power adapter, we never had problems with the projector’s fan. Even at peak usage, the fan maintained steady performance at a low whirr. Especially when you use the mini projector for movie watching, its ability to stay quiet is a plus. The included carrying case provides ample protection when you’re on the go, and it even has a tethered rubber bulb cover. It’s a nice added touch that further protects the projector from fingerprints and scratches.

In general, pico projectors have middling sound quality, and you’re often better off connecting to an external audio source, and this is the case with the ML750ST. Its single speaker works in a pinch, but its bass and low-end definition are lacking. Still, the speaker can project loud enough for videos and presentations. As with most high-end mini projectors, the Optoma doesn’t have an internal battery, so you have to keep it close to a wall power outlet.

Help & Support

Optoma offers a one-year warranty on the ML750ST. You can also get troubleshooting assistance from the company through channels including phone agents, live chat, email and an online support section.


Whether you’re a home user looking for an upscale mini projector or a business owner who need a compact and effective display tool, the Optoma ML750ST sits at the top of the heap. Its business focus creates some functionality gaps for home users, but its image quality and construction make it a powerful dedicated projector.

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