Panasonic PT-RZ660 vs ViewSonic LS901-4K
Bold marks the better figure where both are stated to the same standard. “—” means the manufacturer doesn't state it.
 Panasonic PT-RZ660MSRP $14,549 | ViewSonic LS901-4K MSRP $3,699 | |
|---|---|---|
| Display system | ||
| Imaging technology | DLP | DLP |
| Technology brand | DLP | DLP |
| Number of imaging devices | 1 | 1 |
| Chip / panel diagonal | 0.67 in | 0.65 in |
| Native aspect ratio | 16:10 | 16:9 |
| Native resolution | 1920 × 1200 | — |
| Pixel shift | None | — |
| Addressable resolution | — | 3840 × 2160 |
| Colour wheel segments | Phosphor wheel with a "quartet colour harmonizer" (a fourth, yellow segment added to the red/green/blue segments) | — |
| Optics | ||
| Throw ratio | 1.7–2.4:1 | 1.2–2.04:1 |
| Projection distance table | 50″: 1.82–2.57 m · 60″: 2.2–3.1 m · 70″: 2.58–3.63 m · 80″: 2.95–4.16 m · 90″: 3.33–4.69 m · 100″: 3.71–5.21 m · 120″: 4.47–6.27 m · 150″: 5.6–7.86 m · 200″: 7.5–10.5 m · 250″: 9.39–13.14 m · 300″: 11.28–15.79 m · 350″: 13.18–18.43 m · 400″: 15.07–21.07 m · 500″: 18.86–26.36 m · 600″: 22.64–31.65 m | 30″: 0.8–1.36 m · 40″: 1.06–1.81 m · 50″: 1.33–2.26 m · 60″: 1.59–2.71 m · 70″: 1.86–3.16 m · 80″: 2.13–3.61 m · 90″: 2.39–4.07 m · 100″: 2.66–4.52 m · 110″: 2.92–4.97 m · 120″: 3.19–5.42 m · 130″: 3.45–5.87 m · 140″: 3.72–6.32 m · 150″: 3.99–6.77 m · 200″: 5.31–9.03 m · 250″: 6.64–11.29 m · 300″: 7.97–13.55 m |
| Zoom type | Optical | Optical |
| Zoom ratio | 1.41× | 1.7× |
| Focus | Motorized | Manual |
| Vertical lens shift | -16–50% | -21–0% |
| Horizontal lens shift | -30–10% | — |
| Fixed offset | — | 154% |
| Focal length | 25.6–35.7 mm | 17.63–27.9 mm |
| F-number | 1.7–1.9 | 2.3–3 |
| Interchangeable lens | Yes | — |
| Image size range | 50–600 in | 30–300 in |
| Vertical keystone | -40–40° | -30–30° |
| Horizontal keystone | -15–15° | -30–30° |
| Corner / warp correction | 4pt | Warp |
| Light source | ||
| Light source type | Laser (phosphor) | Laser (phosphor) |
| Light source detail | Two laser modules (blue laser, 448-462 nm label) with a phosphor wheel | — |
| Light source life | Normal: 20,000 h · Eco: 24,000 h · Long life1: 43,000 h · Long life2: 61,000 h · Long life3: 87,000 h | Normal: 20,000 h · Super eco: 30,000 h |
| Life definition | 50% brightness | — |
| Constant brightness mode | Yes | — |
| Laser wavelengths | B 455 nmDerived | — |
| Light-source dimming | — | Dynamic frame |
| Brightness | ||
| ISO light output | 6,000 lm | — |
| ANSI lumens | 6,000 lm | 5,500 lm |
| Claimed brightness (non-standard) | — | 6,000 |
| Claimed brightness unit | — | Unspecified |
| Contrast & black level | ||
| Dynamic contrast | 10,000:1 | 3,000,000:1 |
| Dynamic light control | Laser dimming | Laser dimming |
| Colour | ||
| Bit depth / 'number of colours' | — | 30 bit |
| HDR | ||
| HDR formats | — | HDR10, HLG |
| Motion & gaming | ||
| Max refresh rate | — | 1920×1080: 240 Hz · 2560×1440: 120 Hz · 3840×2160: 60 Hz |
| Audio | ||
| Speaker power | — | 30 W |
| Speaker count | 0 | 2 |
| Audio outputs | — | 3.5 mm |
| Inputs, control & connectivity | ||
| Max input signal | 1920 × 1200 | 3840 × 2160 |
| HDMI port count | 1 | 2 |
| HDMI ports (feature-level) | HDMI IN: HDMI | HDMI 1: HDMI 2.0, HDCP 2.3; HDMI 2: HDMI 2.0, HDCP 2.3 |
| Horizontal scan frequency | — | 15–255 kHz |
| Vertical scan frequency | — | 23–240 Hz |
| HDBaseT | Yes | — |
| SDI | Yes | — |
| VGA input | Yes | — |
| USB media playback | — | No |
| RS-232 | Yes | Yes |
| LAN control | Yes | Yes |
| PJLink class | Class 1 | — |
| Control ecosystem drivers | Crestron | Crestron |
| Ethernet | — | Yes |
| 3D | ||
| 3D support | — | Yes |
| 3D sync method | — | DLP-Link |
| 3D formats | — | Side-by-side, Top-bottom, Frame sequential |
| Acoustic noise | ||
| Fan noise (sound pressure) | Rated: 35 dB(A) | Normal: 31 dB(A) · Eco: 25 dB(A) |
| Environment & power | ||
| Operating temperature | 0–45°C | 0–40°C |
| Operating humidity | 10–80%RH | 10–80%RH |
| Altitude / high-altitude mode | 4,200 m | 3,658 m |
| High-altitude mode | — | Yes |
| Operating orientations | Table, Ceiling, Rear, Portrait, 360° | Table, Ceiling, Rear |
| Rated voltage | 100–240 V | 100–240 V |
| Rated frequency | 50–60 Hz | 50–60 Hz |
| Power consumption (max) | 700 W | — |
| Power consumption by mode | Standby normal: 3 W · Quick startup: 85 W · Standby eco: 0.3 W | Normal: 245 W |
| Standby power | 0.3 W | 0.5 W |
| Networked standby power | 3 W | — |
| Power supply | Internal | — |
| Physical & installation | ||
| Width | 498 mm | 337 mm |
| Depth | 581 mm | 280 mm |
| Height | 200 mm | 132 mm |
| Weight | 23.1 kg | 4.85 kg |
| Colours / finishes | Black, White | White |
| Mount hole pattern | Thread: M6 · Screw length mm: 12 · Holes: 5 | — |
| Sealed optical engine | Yes | Yes |
| Air filter | — | None |
| Safety & compliance | ||
| Photobiological risk group | RG2 | RG2 |
| Hazard distance | — | 1 m |
| Laser product class | Class 3R (USA and Canada); Class 1 (other countries or regions) | Class 1 |
| Safety & market certifications | FCC | CE, FCC |
| Support & ownership | ||
| Warranty | 🇺🇸 US 3 yr | 🇺🇸 US 3 yr |
| User manual | https://eu.connect.panasonic.com/sites/default/files/media/document/2025-08/rz770_rz660_manual_en.pdf | https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LS901HD_LS901-4K/LS901HD_LS901-4K_UG_ENG.pdf |
| In the box | ||
| Box contents | Projector, Remote, Batteries, Power cord, Lens cap, Lens mount cover, Cd rom | Projector, Remote, Batteries, Quick start guide, Power cord |
| Remote type | — | IR |