BenQ TK705i
#2 in 4KFull review
A smart LED 4K projector for a living room that doubles as a console gaming screen, with three-year coverage and no lamp to replace.
Amazon $1,599$1,599
The BenQ TK705i rates 4.7 among 4K projectors; the BenQ TH671ST rates 4.1 among native 1080p ones. The BenQ TH671ST costs $750 less ($849 vs $1,599).
BenQ TH671ST
#5 in Native 1080pFull review
A bright short throw 1080p projector for gaming in small rooms, for buyers who don’t need 4K or HDR.
Amazon $849$849
Prices were last checked October 29, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (4K and native 1080p), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | BenQ TK705i | BenQ TH671ST |
|---|---|---|
| Overall rating | 4.7/5 | 4.1/5 |
| Brightness 25% | 86 3,000 ANSI lumens | 95 3,000 ANSI lumens |
| Value 15% | 86 $0.53 per lumen | 84 $0.28 per lumen |
| Resolution 10% | 100 4K (pixel shift) | 100 1920 x 1080 native |
| Streaming 15% | 100 Google TV with licensed Netflix | 0 no built-in apps; needs a streaming stick |
| Setup 10% | 80 Autofocus, auto keystone, 1.3x zoom | 50 Auto keystone, 1.2x zoom |
| Light life 10% | 100 30,000 hour LED | 69 15,000 hour lamp |
| Gaming 10% | 100 5 ms input lag | 100 8 ms input lag |
| Warranty 5% | 100 3-year warranty | 100 3-year warranty |
Specifications
| BenQ TK705i | BenQ TH671ST | |
|---|---|---|
| Picture | ||
| Brightness | 3,000 ANSI | 3,000 ANSI |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 4K (pixel shift from 1920x1080) | 1080p |
| Display | DLP | DLP |
| Light source | LED | lamp |
| Light source life | 30,000 hours | 15,000 hours |
| HDR | HDR10, HDR10+, HLG | - |
| Color gamut | 98% Rec.709 | 92% Rec.709 |
| Native contrast | - | 10,000:1 |
| Dynamic contrast | 600,000:1 | - |
| Placement | ||
| Throw | Standard throw (1:1) | Short throw (0.7:1) |
| Largest image | 150 in | 300 in |
| Autofocus | Yes | No |
| Auto keystone | Yes | Yes |
| Obstacle avoidance | - | No |
| Auto screen fit | Yes | No |
| Optical zoom | 1.3x | 1.2x |
| Streaming and gaming | ||
| Built-in apps | Google TV, licensed Netflix | None |
| Input lag | 5 ms | 8 ms |
| Top refresh rate | 60 Hz | 120 Hz |
| HDMI ports | 2 | 2 |
| eARC | Yes | - |
| Speakers | 16 W | 5 W |
| Build | ||
| Battery | None | None |
| Fan noise | 26 dB | 33 dB |
| Power | 250 W | 320 W |
| Dimensions | 229 x 250 x 168 mm (9.02 x 9.83 x 6.62 in, W x D x H) | 296 x 224 x 120 mm (W x D x H) |
| Weight | 8.4 lb | 6 lb |
| Warranty | 3 years | 3 years |
| Released | 2025-10 | 2017-11 |