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- 4K550ST vs PX725HD
Optoma 4K550ST vs ViewSonic PX725HD
What 4K550ST does better (5) and where PX725HD wins (4) — every spec side by side.
Why is 4K550ST better than PX725HD?
- Brightness (ANSI / ISO lumens)4,500 lm vs 2,000 lm2.2×
- Resolution (on screen)3840 × 2160 (4K UHD) vs 1920 × 1080 (Full HD)
- Built-in speakers (total output)10 W vs 8 W+25%
- Ethernet (LAN)Yes · PX725HD: No
- Fan noise32 dB vs 34 dB+6%
Why is PX725HD better than 4K550ST?
- Contrast ratio (dynamic / claimed)10,000:1 vs 22,000:12.2×
- Weight5.9 kg vs 2.94 kg2×
- Light source life3,000 h vs 3,500 h+17%
- Power consumption335 W vs 310 W+8%
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 3840 × 2160 (4K UHD) | 1920 × 1080 (Full HD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | 4K by pixel shifting | — |
| Display technology | DLP | DLP |
| Brightness (ANSI / ISO lumens) | 4,500 lm | 2,000 lm |
| Contrast ratio (dynamic / claimed) | 10,000:1 | 22,000:1 |
| HDR support | Yes | — |
| 3D playback | Yes | — |
| Gaming | ||
| Maximum refresh rate | 120 Hz | 120 Hz |
| Lens & placement | ||
| Throw ratio | 0.78:1 | — |
| Throw type | Short throw (0.4–1.0:1) | — |
| Distance for a 100″ 16:9 image | 1.73 m | — |
| Smallest image size | 29″ | — |
| Largest image size | 300″ | — |
| Lens shift | Vertical | — |
| Sound | ||
| Built-in speakers (total output) | 10 W | 8 W |
| Connectivity | ||
| HDMI inputs | 2 | 2 |
| HDMI version | — | 1.4 |
| USB port | Yes | Yes |
| Ethernet (LAN) | Yes | No |
| VGA input | Yes | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 335 W | 310 W |
| Light source life | 3,000 h | 3,500 h |
| Light source life (eco mode) | 4,000 h | 7,000 h |
| Design & noise | ||
| Fan noise | 32 dB | 34 dB |
| Fan noise (eco mode) | — | 30 dB |
| Weight | 5.9 kg | 2.94 kg |
| Width | 392 mm | — |
| Height | 129 mm | — |
| Depth | 281 mm | — |
| Colours | White | White |
