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- TH685P vs GT2100HDR
BenQ TH685P vs Optoma GT2100HDR
What TH685P does better (2) and where GT2100HDR wins (4) — every spec side by side.
Dimensions
Size comparison
TH685PGT2100HDR
| TH685P | GT2100HDR | Difference | |
|---|---|---|---|
| Height | 110 mm | 114 mm | −4 mm |
| Width | 312 mm | 274 mm | +38 mm |
| Depth | 225 mm | 216 mm | +9 mm |
| Weight | 2.8 kg | 3 kg | −0.2 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is TH685P better than GT2100HDR?
- Fan noise35 dB vs 36 dB+3%
- Weight2.8 kg vs 3 kg+7%
Why is GT2100HDR better than TH685P?
- Built-in speakers (total output)5 W vs 15 W3×
- Light source life4,000 h vs 30,000 h7.5×
- HDMI inputs1 vs 22×
- Ethernet (LAN)No · TH685P: Yes
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| Display technology | DLP | DLP |
| Light source | Lamp | Laser |
| Brightness (ANSI / ISO lumens) | — | 4,200 lm |
| Contrast ratio (dynamic / claimed) | — | 300,000:1 |
| HDR support | — | Yes |
| Gaming | ||
| Maximum refresh rate | 120 Hz | 120 Hz |
| Lens & placement | ||
| Throw ratio | 1.13:1 | 0.5:1 |
| Throw ratio (zoomed in) | 1.46:1 | — |
| Throw type | Standard throw (1.0:1 and longer) | Short throw (0.4–1.0:1) |
| Distance for a 100″ 16:9 image | 2.5 m | 1.11 m |
| Smallest image size | 30″ | 36″ |
| Largest image size | 300″ | 300″ |
| Lens shift | — | None |
| Keystone correction | — | Yes |
| Automatic keystone correction | — | No |
| Sound | ||
| Built-in speakers (total output) | 5 W | 15 W |
| Smart & streaming | ||
| Wi-Fi | — | Yes |
| Connectivity | ||
| HDMI inputs | 1 | 2 |
| USB-C video input | Yes | — |
| USB port | Yes | Yes |
| Ethernet (LAN) | No | Yes |
| VGA input | Yes | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | — | 173 W |
| Light source life | 4,000 h | 30,000 h |
| Light source life (eco mode) | 10,000 h | — |
| Design & noise | ||
| Fan noise | 35 dB | 36 dB |
| Fan noise (eco mode) | 29 dB | 29 dB |
| Weight | 2.8 kg | 3 kg |
| Width | 312 mm | 274 mm |
| Height | 110 mm | 114 mm |
| Depth | 225 mm | 216 mm |
| Colours | White | White |
