Home / Home Cinema Projectors / ViewSonic LX720-4KB 3,500 ANSI Lumens 4K Smart Laser Projector

ViewSonic

ViewSonic LX720-4KB 3,500 ANSI Lumens 4K Smart Laser Projector

Name: ViewSonic LX720-4KB 3,500 ANSI Lumens 4K Smart Laser Projector
Brand: ViewSonic
SKU: LX720-4KB
Price: 1116.70 GBP
Availability: InStock

Return within 14 days

3-year manufacturer warranty

Installation services available

£1,116.70inc. VAT

£930.58 ex. VAT

In stock, dispatched within 2 working days

Visa
Mastercard
American Express
PayPal

Or 3 interest-free payments of £372.24 with PayPal Pay in 3.

4.5 on Trustpilot · 14 reviews

Seen it cheaper? We price-match genuine like-for-like quotes. How it works

Bought in the UK, backed in the UKWhy it matters →

In UK stock, ships from the UK
UK manufacturer warranty
UK-based engineers
No import duty or customs charges
GBP pricing, UK VAT invoices

Return within 14 days

3-year manufacturer warranty

Installation services available

Call 01342 580255

Key specifications

Resolution4K UHD (3840 x 2160)

White Light Output3,500 ANSI lumens

Contrast Ratio3,000,000:1

Aspect Ratio16:9

Projection TechnologySingle-chip DLP, 0.47" DMD

Light SourceLaser phosphor, 20,000 h (normal) / 30,000 h (SuperEco)

Throw Ratio1.127 - 1.465:1

Zoom1.3x optical

All 20 specifications

Talk to an Expert

Description

Immersive true 4K HDR offering up to 300" screen

Also in this range:LX750-4KB Full specifications Compare alternatives

Vibrant and clear visuals with 3,500 ANSI Lumens of brightness

Powerful 10W cube speaker for immersive sound

Installation flexibility: 1.3x optical zoom, H/V keystone, 4 corners adjustment

Easy streaming with built-in Google TV and native Netflix app

*Support frame sequential only

Native 4K HDR

*The ability to power external devices via USB-A depends on the specific power requirements of the connected device.

**The streaming devices of brands stated herein are for demo purposes only and are not preinstalled and not included in the Product. The aforesaid devices are the properties of their respective owners, unaffiliated with ViewSonic, and are neither sponsors nor endorsers of the Product.

***The Product's aforesaid compatibility with streaming devices of brands not stated herein mayvary based on specifications. Please verify before purchasing the Product.

Built-in Google TV

*1ms Ultra-Fast Input supports up to 240Hz at 1080p resolution and up to 60Hz at 4K resolution. This feature is automatically activated when keystone, corner adjustment, overscan, and aspect ratio are set to default.

**The response time stated refers to the reaction time of the DMD chip.

1ms Low Latency

*Only works with “smart system” input source

*To enable the AirPlay function, you may need to install a third-party application.

*Only works with “smart system” input source

Bluetooth Audio Output

*The low blue light mode can be activated manually.

Call 01342 580255

Key features

3,500 ANSI Lumens 4K Smart Laser Home Projector

3rd generation laser phosphor technology with up to a 20,000-hour lifespan

OVERVIEW

Transform your home into a cinematic experience with the LX720-4KB smart laser projector. Equipped with 3rd-generation laser phosphor technology, it delivers 3,500 ANSI Lumens of brightness and up to 20,000 hours of lamp-free use, ensuring vivid visuals day or night. Enjoy immersive 4K HDR picture quality on screens up to 300 inches, paired with a built-in 10W cube speaker for rich, room-filling sound. With features like 1.3x optical zoom, H/V keystone correction, and four-corner adjustment, setup is simple and flexible. Plus, with Google TV and a native Netflix app, the LX720-4KB brings effortless streaming and premium entertainment into any room.

Reliable Performance for Endless Fun

The LX720-4KB adopts 3rd-generation laser phosphor technology for long-lasting, lamp-free performance. With a lifespan of up to 20,000 hours, there's no need for lamp replacements—delivering reliable, year-round entertainment while saving you time, effort, and ongoing maintenance costs. 3rd-gen Laser Phosphor Technology

Ultimate Viewing Experience with 4K HDR

Experience true 4K UHD clarity and dynamic visuals powered by HDR/HLG and 3D support*. The LX720-4KB features dual HDMI 2.0b and HDCP 2.2 ports to ensure native 4K quality, bringing your favorite games, sports, movies, and shows vividly to life.

Bright Images Anytime

Enjoy brilliant entertainment anytime—day or night. Whether it’s movie night with the family or a sunny afternoon game, the LX720-4KB shines with 3,500 ANSI Lumens of brightness, so you never miss a detail. 3,500 ANSI Lumens

Bring the Big Screen Home

Turn any room into a personal theater with a massive screen size of up to 300 inches. From epic movie nights to gaming marathons and live concert streams, the LX720-4KB lets you bring everyone together for unforgettable moments on the big screen. Up to 300” Screen Size

Crisp Sound, Right Out of the Box

Skip the speaker setup. With a built-in 10W cube speaker, the LX720-4KB lets you dive into movies, music, and more with crisp, room-filling audio right out of the box. 10W Cube Speaker

Big Screen, No Big Rearranging

The 1.3x optical zoom lens gives you flexibility to fine-tune placement and screen size, even if the projector isn’t mounted at the perfect distance. Get the image size you want without needing to reposition your ceiling mount. 1.3x Optical Zoom

Perfect Image Projection from All Angles

Thanks to flexible H/V keystone correction and 4-corner adjustment, you’ll get a perfectly aligned image even if the projector isn’t mounted perfectly centered. Whether it’s tilted down, angled up, or projected from the side, setup is easy and your picture stays sharp. H/V Keystone Correction, 4 Corner Adjustment

Stream Your Way, On the Big Screen

Stream smarter with built-in Google TV. The LX720-4KB comes ready to go with your favorite apps like Netflix, YouTube, and Disney+, no extra devices needed. Just sign in and start streaming. Prefer a device you already use? It also works smoothly with Chromecast, Apple TV, Fire TV, Roku, and more. Plus, the USB-A port lets you keep external streamers powered up without extra adapters.*

Speed That Keeps You Ahead

The LX720-4KB supports 1ms ultra-fast input*, a blazing 240Hz refresh rate, and near-instant response time**, so fast-paced games, action scenes, and live sports play out with crystal clarity and no motion blur.

Wireless Screen Casting from Your Smart Devices

With fast, stable 5GHz Wi-Fi built in, casting from your phone, tablet, or laptop is easy and cable-free. Stream videos, share photos, or mirror your screen to enjoy your favorite content on the big screen—no extra setup required.*

Technical specifications

Choose a section to view its specifications.

Display (5)

Resolution: 4K UHD (3840 x 2160)
Contrast Ratio: 3,000,000:1
Aspect Ratio: 16:9
Screen Size Range: 60 - 300 inches
HDR Support: HDR / HLG

Connectivity (2)

White Light Output: 3,500 ANSI lumens
Connectivity: 2 x HDMI 2.0, Wi-Fi, Bluetooth, RS-232, 1 x USB-A, 3.5 mm audio out

Audio (1)

Audio: 10 W speaker

Power & Physical (3)

Power Consumption: 143 W (normal), <0.5 W standby
Dimensions (W x D x H): 312 x 234 x 104 mm
Weight: 3.5 kg

Certifications & Warranty (1)

Warranty: 3 years

General (8)

Projection Technology: Single-chip DLP, 0.47" DMD
Light Source: Laser phosphor, 20,000 h (normal) / 30,000 h (SuperEco)
Throw Ratio: 1.127 - 1.465:1
Zoom: 1.3x optical
Projection Distance: 1.49 - 9.72 m
Keystone Correction: H ±25°, V ±25°
Smart Platform: Google TV, native Netflix app
Noise Level: 32 dB (normal), 26 dB (eco)

Call 01342 580255

Throw distance guide

With its 1.127 to 1.465:1 throw ratio, here's how far the projector needs to sit from the screen for common 16:9 image sizes. Try our throw distance calculator for your exact room.

Supported image: 60″ to 300″ diagonalLens distance: 1.49 to 9.72 m

Try a size

100"

16:9 diagonal image

Image

2.21 m × 1.25 m

Lens position

2.5 m to 3.2 m

Side view: drag the projector to try its available lens positions

Position fits

Manufacturer lens-distance limit: 1.5 m to 9.7 m. The dotted lines show the usable zoom positions for this picture size.

Image size	Image dimensions	Lens distance range
60"	1.33 m × 0.75 m	1.5 m to 1.9 m
80"	1.77 m × 1.00 m	2.0 m to 2.6 m
100"	2.21 m × 1.25 m	2.5 m to 3.2 m
120"	2.66 m × 1.49 m	3.0 m to 3.9 m
150"	3.32 m × 1.87 m	3.7 m to 4.9 m
200"	4.43 m × 2.49 m	5.0 m to 6.5 m
250"	5.53 m × 3.11 m	6.2 m to 8.1 m
300"	6.64 m × 3.74 m	7.5 m to 9.7 m

Planning from a real wall? Use the projector screen size calculator to upload a photo, preview the image to scale and find projectors that fit within your maximum available space. Replacing an existing projector? The projector replacement calculator checks whether this lens covers the ratio your current mount needs.

Distances are lens-to-screen, calculated from the manufacturer's stated throw ratio; allow for lens shift and mounting hardware. Always confirm against the manufacturer's installation guide before fixing mounts.

See it on your wall, to scale

Choose a picture size, then upload a wall photo, or scan the QR code and take it on your phone. We'll show the projected picture at its real size.

Picture size

100" 16:9 · 2.21 m × 1.25 m

On a computer, the QR code sends your phone photo straight back to this page.

Loading the wall preview…

Complete your setup

Optional extras that fit this product. Tick anything you need and it joins the same basket — or add this product on its own from the buy box above.

Choose a Mount

Open

Choose a Screen

Video Conferencing

No video conferencing options found in our catalogue.

Professional Installation

Want it installed by our AV experts? We offer professional on-site installation including mounting, cable management, and system configuration.

Add installation enquiryWe'll contact you to arrange a site surveyPOA

Your Configuration

ViewSonic LX720-4KB 3,500 ANSI Lumens 4K Smart Laser Projector × 1£1,116.70

Total£1,116.70

inc. VAT

Delivery & returns

Estimated delivery 15 Sept - 19 Sept. UK mainland delivery only. Some large or made-to-order items carry longer lead times, shown on the product page.

Unused items in original packaging can be returned within 14 days of delivery — see the returns policy for how business and consumer returns differ. Faulty items are covered under manufacturer warranty and by your statutory rights.

Full delivery & returns policy

Bought in the UK, backed in the UK

This item is in UK stock and ships to you from within the UK, so the order never crosses a customs border on its way to you.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us, not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts: no currency conversion and no surprises at the door.

What to check before buying AV online →

Payment & security

Pay securely by card. Education customers can apply for a 30-day purchase order account.

Schools, colleges, sixth forms, universities and multi-academy trusts can order on invoice, with no card payment required. Purchase orders and credit terms are for education customers only.

All transactions are processed over an encrypted, secure checkout.

Purchase order & invoice terms