BenQ TH671ST vs Optoma GT1080HDR for Australian Homes

Choosing between the BenQ TH671ST and Optoma GT1080HDR comes down to more than brightness or screen size. Both are Full HD short throw projectors designed for big-screen entertainment and gaming, yet they suit different buyers because of their launch dates, image features, placement flexibility and likely availability in Australia.

The BenQ TH671ST is an older, gaming-focused model with a strong reputation for responsive play and a natural-looking 1080p picture. The Optoma GT1080HDR is the newer, brighter alternative, adding HDR support, a shorter throw distance and a faster gaming mode. That makes the Optoma particularly attractive for lounge rooms, bedrooms and multipurpose spaces where a television-sized image needs to fit close to the wall.

Australian buyers should also account for stock, warranty coverage and room lighting. The BenQ may be found through used, refurbished or remaining retail inventory, while the Optoma is more likely to appear through current projector retailers. Prices can vary significantly, so specifications should be weighed against the condition and support offered with each unit.

Image Quality And Brightness

Both projectors use DLP technology and produce a 1920 x 1080 Full HD image. That resolution remains a sensible choice for streaming, console gaming and Blu-ray content, especially at screen sizes around 80 to 120 inches. Text and game interfaces appear sharper than they would on many inexpensive 720p projectors, while DLP generally delivers good motion clarity and a crisp picture.

The GT1080HDR has the advantage in rated brightness, producing up to 3,800 ANSI lumens compared with roughly 3,000 ANSI lumens from the TH671ST. In practice, brightness depends on the picture mode, lamp age, screen material and room conditions. The Optoma is better equipped for daytime viewing, although direct sunlight will still wash out either projector. In Sydney or Brisbane homes with large windows, blockout blinds can make a greater difference than the specification sheet suggests.

The Optoma also accepts HDR10 content and can display a wider range of brightness in compatible movies and games. Its HDR result is limited by the projector’s contrast performance, so it will not resemble a premium HDR television. Still, highlights in supported content can look more vivid. The BenQ’s SDR image often looks more straightforward and consistent, which may appeal to viewers who prefer accurate, uncomplicated colour.

Throw Distance And Room Placement

Short throw design is the main practical strength of both models. The TH671ST can create a 100-inch image from approximately 1.5 metres away, while the GT1080HDR can achieve the same size from around 1.1 metres. That difference matters in an Australian apartment, where a sofa, coffee table and rear wall may leave little room for a conventional projector.

The Optoma’s shorter throw reduces the chance of people walking through the beam during a film or game. It can sit close to the wall on a low cabinet, making it a good match for a bedroom or compact media room. The trade-off is that short throw projectors need careful positioning: a small movement can noticeably alter the image size or alignment.

Neither model should be treated like a modern smart projector with extensive automatic correction. Keystone adjustment is available, but excessive digital correction can soften the image. A level cabinet, suitable wall or fixed screen and accurate placement will produce a better result. Measure the throw distance before buying, especially if the projector will sit on furniture rather than mount to the ceiling.

Gaming Performance And Everyday Use

The TH671ST was designed with console and PC gaming in mind. Its low input lag helps commands feel responsive, and its 1080p output suits PlayStation 4, Xbox One, Nintendo Switch and many gaming PCs. For casual and competitive play, it remains capable, particularly when used in a dedicated low-latency picture mode.

The GT1080HDR is the stronger choice for modern gaming. Its Enhanced Gaming Mode can reduce input lag to around 8.4 milliseconds, depending on the signal and settings, and it supports 4K input while displaying the image at Full HD resolution. That does not make it a native 4K projector, but it gives newer consoles greater compatibility. The high refresh and responsive operation are useful for racing games, sports titles and fast multiplayer action.

Neither projector offers the full benefits of HDMI 2.1, native 4K resolution or advanced features such as variable refresh rate. Buyers with a PlayStation 5 or Xbox Series X can still enjoy a large image, but should regard these as affordable 1080p gaming projectors rather than future-proof home cinema equipment. For weekend sport or local multiplayer sessions, the Optoma’s brightness and low-lag performance provide the more convincing package.

Connectivity, Audio And Installation

The BenQ and Optoma include HDMI connectivity for streaming devices, consoles, laptops and Blu-ray players. They also have built-in speakers, with the Optoma offering a 10-watt speaker system suited to casual use. These speakers can fill a small room, but an external soundbar, powered speakers or AV receiver will deliver clearer dialogue and stronger bass for films.

A streaming stick is usually the easiest way to add apps, since the projectors themselves do not provide the smart-TV interface found on current televisions. Check the physical space around the HDMI ports before installation, as a bulky streaming device may need a short extension cable. Buyers comparing equipment and placement options can also consult this projector comparison guide while planning a home cinema setup.

Australian power requirements deserve attention when purchasing older or imported stock. The projector should include an Australian-compatible power cable and be rated for the local 230–240V supply. A grey import may be cheaper, but warranty handling can be less convenient than buying through an Australian retailer. The same consideration applies to replacement lamps, remote controls and service parts.

Value, Availability And Ownership

The TH671ST can offer excellent value if found in clean, tested condition at a sensible price. Its picture quality and gaming responsiveness remain useful, but lamp life, fan noise and general wear matter with an older projector. Ask for evidence of operating hours where possible, inspect the lens and check that the remote, power cable and original accessories are included.

The GT1080HDR normally justifies a higher price through its brighter lamp, shorter throw, HDR compatibility and stronger low-latency mode. It is the safer purchase for someone building a new setup and wanting a projector that can handle brighter rooms and current consoles. Its lamp is still a consumable component, so calculate replacement costs rather than comparing only the initial purchase price.

Australian consumer protections can also influence the decision. Products sold by Australian businesses are covered by the Australian Consumer Law, which provides guarantees about acceptable quality, fitness for purpose and correspondence with descriptions. Those rights do not automatically make an imported or second-hand purchase equivalent to new local stock, so retain the receipt and check who is responsible for support.

For most buyers, the Optoma GT1080HDR is the better all-round short throw projector. It delivers the brighter image, shorter placement distance, HDR input and quicker gaming response. The BenQ TH671ST remains appealing when its lower price, proven Full HD performance or natural SDR presentation outweighs its age and limited availability.

Choose the BenQ when the room can be darkened, the unit is well maintained and the deal is substantially cheaper. Choose the Optoma when you need a 100-inch image from close range, play newer consoles or watch during daylight. Before ordering, measure the wall, confirm Australian warranty coverage and budget for speakers or a replacement lamp so the projector performs as expected from the first viewing.