Our take
BenQ specifies the TK800M as a home-entertainment projector with 4K UHD 3840 × 2160 output, 3,000 ANSI lumens, a lamp light source, 1.50–1.65:1 throw, and 1.1× zoom. It includes two HDMI inputs and a 5 W speaker. The checked product page calls the output 4K UHD but does not establish the physical imager’s native horizontal pixel count, so this entry does not treat it as native 4K for strict matching. It suits a measured conventional room better than a close-wall setup. Check lamp hours, lens alignment, and source compatibility on an exact unit.
A fixed home cinema or sports room where 4K UHD output and a 3,000-ANSI rating matter more than UST or a lamp-free source..
It is not for an ultra-short-throw console, a lamp-free maintenance plan, built-in streaming apps, or a buyer who requires documented native 3840-pixel imaging.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- BenQ lists 4K UHD output and a 3,000 ANSI-lumen rating for home entertainment.
- The 1.50–1.65:1 throw range and 1.1× optical zoom allow measured adjustment in a conventional room.
- Two HDMI inputs and a 5 W chamber speaker provide straightforward source and audio connections.
What to weigh up
- The checked BenQ page does not state the native physical imager pixel count, so 4K output should not be equated with native 4K imaging.
- The lamp needs eventual maintenance and its used-unit hours and condition are unknown.
- A 1.50–1.65:1 ratio requires several metres for a wide image and is not a close-wall solution.
The key details
| Model covered | TK800M |
|---|---|
| Image format | 4K UHD 3840 × 2160 output; native imager pixel count not stated |
| Rated light output | 3,000 ANSI lumens |
| Placement | 1.50–1.65:1 conventional throw; 1.1× zoom |
Performance figures are manufacturer claims. Source checked October 11, 2026. Regional models and included accessories can differ.
What the features mean for you
Separate 4K UHD output from native imager pixels
BenQ lists the TK800M resolution as 4K UHD 3840 × 2160, and the product FAQ describes high-speed pixel displacement and superimposition to produce 8.3 million pixels. That explains the UHD output route, but the reviewed materials still do not state the TK800M's physical DMD native horizontal pixel count. This guide keeps native pixels unknown rather than using output resolution as a substitute. A buyer comparing it with native 4K devices should distinguish input, output, and imager resolution. For general 4K UHD playback the listed format is relevant; for strict native-imaging criteria, use a documented device specification.
Use 3,000 ANSI lumens as a model rating
BenQ explicitly labels the TK800M output at 3,000 ANSI lumens, making this figure comparable in method with other ANSI-rated projectors. That can help with a sports or living-room setup where some ambient light may be present, but it does not guarantee image quality under all conditions. Screen size, room light, picture mode, and screen surface affect the result. A lamp projector may produce less light as the lamp ages, so a used unit's rating is not its measured output. Ask for lamp hours and view the image after warm-up at the size and lighting level you expect to use.
Measure the throw before choosing a mount
The TK800M specification gives a 1.50–1.65:1 throw ratio and 1.1× optical zoom. That is a conventional lens range, not UST. For a large image the projector needs room depth, and zoom gives a limited adjustment around the planned distance. Measure from the lens to the screen and use BenQ's throw calculator before choosing a shelf or ceiling mount. The specification page describes vertical keystone, but it does not establish optical lens shift. Keep the projector square to the screen where possible; digital correction does not replace a correct mount location or preserve every pixel.
Plan a lamp-based ownership routine
BenQ lists a lamp light source and different rated operating life by lamp mode. That gives the TK800M a replaceable-lamp maintenance path rather than a laser or LED design. The rated hours are a model claim and do not predict the condition of a particular unit. Check the lamp-hour counter, replacement history, color uniformity, dust spots, focus across the frame, fan noise, and the availability of a compatible replacement lamp. If the projector is already installed, inspect ventilation and the ceiling mount as well. A 4K UHD format does not compensate for a dim or misaligned used lamp.
Use HDMI for external sources and verify audio
BenQ lists two HDMI inputs, a VGA input, USB power, RS-232, and a 5 W chamber speaker. HDMI can connect a console, receiver, or external streamer, but the checked source does not document a built-in streaming platform. The internal speaker can cover simple viewing, while a separate sound system may better suit a dedicated theater. Confirm that source devices, HDCP, HDR settings, and audio output work together before installation. Check the exact projector's ports and remote rather than assuming a seller's package contains every cable. If online apps are required, include a compatible external player in the system plan.
What else to compare
For documented native 4K imaging, compare a projector whose manufacturer states the physical device pixels; for a close wall, use a model with an explicit UST ratio.
Before you buy
Does the TK800M produce a 4K UHD signal?
Yes. BenQ lists 4K UHD 3840 × 2160 output, and its product FAQ describes high-speed pixel displacement and superimposition. The reviewed page does not state the physical DMD's native pixel count.
How bright is the TK800M on an ANSI basis?
BenQ specifies 3,000 ANSI lumens; a used lamp may deliver less than its original model rating.
Can I place it close to the screen?
No UST design is documented; its 1.50–1.65:1 conventional throw requires a measured room distance.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- BenQ TK800M official specifications ↗ — checked October 11, 2026.
- BenQ U.S. TK800M specifications; 4K UHD, brightness, optics, lamp, and inputs ↗ — checked October 11, 2026.
- BenQ TK800M datasheet ↗ — checked October 11, 2026.
- BenQ TK800M official manual page ↗ — checked October 11, 2026.
The decision
Choose TK800M for a fixed room where 4K UHD output, an ANSI rating, and a conventional throw fit together. Keep native imager resolution distinct and inspect the lamp.
Is it the right fit?
Check the exact model and today’s offers on Amazon.