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- LS751HD vs PX749-4K
ViewSonic LS751HD vs ViewSonic PX749-4K
What LS751HD does better (2) and where PX749-4K wins (3) — every spec side by side.
Dimensions
Size comparison
LS751HDPX749-4K
| LS751HD | PX749-4K | Difference | |
|---|---|---|---|
| Height | 132 mm | 222 mm | −90 mm |
| Width | 337 mm | 312 mm | +25 mm |
| Depth | 265 mm | 108 mm | +157 mm |
| Weight | 4.5 kg | 3 kg | +1.5 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is LS751HD better than PX749-4K?
- Brightness (ANSI / ISO lumens)5,000 lm vs 4,000 lm+25%
- Contrast ratio (dynamic / claimed)300,000:1 vs 12,000:125×
Why is PX749-4K better than LS751HD?
- Resolution (on screen)1920 × 1080 (Full HD) vs 3840 × 2160 (4K UHD)
- Light source life20,000 h vs 40,000 h2×
- Weight4.5 kg vs 3 kg+50%
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 1920 × 1080 (Full HD) | 3840 × 2160 (4K UHD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | — | 4K by pixel shifting |
| Display technology | DLP | DLP |
| Light source | Laser | Lamp |
| Brightness (ANSI / ISO lumens) | 5,000 lm | 4,000 lm |
| Contrast ratio (dynamic / claimed) | 300,000:1 | 12,000:1 |
| HDR support | Yes | — |
| 3D playback | Yes | — |
| Gaming | ||
| Maximum refresh rate | 120 Hz | — |
| Lens & placement | ||
| Throw ratio | 1.4:1 | — |
| Throw ratio (zoomed in) | 2.24:1 | — |
| Throw type | Standard throw (1.0:1 and longer) | — |
| Distance for a 100″ 16:9 image | 3.1 m | — |
| Smallest image size | 30″ | — |
| Largest image size | 300″ | — |
| Optical zoom | 2× | — |
| Lens shift | Vertical | — |
| Keystone correction | Yes | — |
| Automatic keystone correction | No | — |
| Sound | ||
| Built-in speakers (total output) | 10 W | — |
| Smart & streaming | ||
| Wi-Fi | Yes | — |
| Connectivity | ||
| HDMI inputs | 2 | 2 |
| HDMI version | 2 | 2 |
| USB port | Yes | Yes |
| Ethernet (LAN) | Yes | Yes |
| VGA input | No | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 245 W | — |
| Light source life | 20,000 h | 40,000 h |
| Light source life (eco mode) | 30,000 h | 20,000 h |
| Design & noise | ||
| Fan noise | 32 dB | — |
| Fan noise (eco mode) | 29 dB | — |
| Weight | 4.5 kg | 3 kg |
| Width | 337 mm | 312 mm |
| Height | 132 mm | 222 mm |
| Depth | 265 mm | 108 mm |
| Colours | White | White |
