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BenQ

BenQ TK705STi 4K 3,000-Lumen Short Throw LED Projector

Name: BenQ TK705STi 4K 3,000-Lumen Short Throw LED Projector
Brand: BenQ
SKU: 9H.R0D77.57E
Price: 1352.81 GBP
Availability: InStock

Return within 14 days

3-year manufacturer warranty

Installation services available

£1,352.81inc. VAT

£1,127.34 ex. VAT

In stock, dispatched within 2 working days

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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

Brightness3000 ANSI lumens

Light Source LifeUp to 30,000 hrs (Eco)

Zoom RatioFixed

Rec. 709 Coverage98%

Input Lag5 ms (4K 60Hz, ALLM)

HDMI Inputs2 x HDMI 2.1

Speaker2 x 8W

Max Image Size150 inch from 8.7ft

All 26 specifications

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Description

The BenQ TK705STi is the short-throw sibling of the TK705i, built for living rooms where the projector needs to sit close to the screen. It projects a crisp, cinema-quality image from 100 to 150 inches from as little as 5.8 to 8.7 feet away, powered by the same maintenance-free 4LED light source rated up to 30,000 hours in Eco mode.

Also in this range:5,500-Lumen 4,600-Lumen 4,000-Lumen 5,000-Lumen Full specifications Datasheet Compare alternatives

A 600,000:1 contrast ratio and 98% Rec.709 colour coverage via BenQ CinematicColor and HDR-Pro deliver cinematic image quality, while an 8-Way Smart Image Adaptation system automatically sharpens, centres and aligns the picture and adjusts tone based on wall colour and ambient light. Built-in Google TV brings Netflix, YouTube and Prime Video without extra hardware.

Ultra-low input lag of 5ms at 4K/60Hz with ALLM support makes it a strong choice for console gaming as well as movie nights, backed by HDMI 2.1 connectivity, eARC audio return and dual 8W speakers.

Call 01342 580255

Key features

Short Throw, Up to 150-inch

Projects 100 to 150 inches from just 5.8 to 8.7 feet away.

8-Way Smart Image Adaptation

Auto sharpens, centres, aligns and adjusts tone based on wall colour and ambient light.

5ms Input Lag with ALLM

Ultra-low input lag at 4K/60Hz for responsive console gaming.

Built-in Google TV

Direct access to Netflix, YouTube, Prime Video and more out of the box.

Technical specifications

Choose a section to view its specifications.

Display (5)

Brightness: 3000 ANSI lumens
Resolution: 4K UHD (3840 x 2160)
Contrast Ratio: 600,000:1
Aspect Ratio: 16:9
HDR Support: HDR10, HDR10+, HLG

Connectivity (4)

Input Lag: 5 ms (4K 60Hz, ALLM)
HDMI Inputs: 2 x HDMI 2.1
White Light Output: 3,000 ANSI lumens
Connectivity: 2 x HDMI 2.1 (HDCP 2.2), USB Type-A, USB Type-C (DisplayPort, 30 W power delivery), 12 V trigger, Wi-Fi 6, Bluetooth 5.2

Audio (2)

Speaker: 2 x 8W
Audio: 2 x 8 W speakers, HDMI eARC 7.1, 3.5 mm audio out

Power & Physical (5)

Max Image Size: 150 inch from 8.7ft
Power Consumption: 250 W typical
Weight: 3.8 kg
Dimensions: 229.2 x 249.7 x 168.2 mm
Dimensions (W x D x H): 229.2 x 249.7 x 168.2 mm

General (10)

Light Source Life: Up to 30,000 hrs (Eco)
Zoom Ratio: Fixed
Rec. 709 Coverage: 98%
Projection Technology: DLP
Light Source: 4LED, 20,000 hours normal / 30,000 hours eco
Throw Ratio: 0.80:1
Zoom: Fixed
Keystone Correction: Auto vertical ±30°, auto horizontal ±20°
Smart Platform: Google TV (Android 11)
Noise Level: 26 dBA normal, 24 dBA eco

Call 01342 580255

Throw distance guide

With its 0.8:1 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.

Try a size

100"

16:9 diagonal image

Image

2.21 m × 1.25 m

Lens position

1.8 m

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

Position fits

Image size	Image dimensions	Lens distance
60"	1.33 m × 0.75 m	1.1 m
80"	1.77 m × 1.00 m	1.4 m
100"	2.21 m × 1.25 m	1.8 m
120"	2.66 m × 1.49 m	2.1 m
150"	3.32 m × 1.87 m	2.7 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.

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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

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Choose a Screen

Video Conferencing

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Professional Installation

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

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Your Configuration

BenQ TK705STi 4K 3,000-Lumen Short Throw LED Projector × 1£1,352.81

Total£1,352.81

inc. VAT

Documents

BenQ TK705STi user manual — BenQ published documentation (PDF)

Frequently asked questions

How far from the screen does the TK705STi sit, and how big can the image get?

With its fixed 0.8 throw ratio, the TK705STi projects a 100 to 150-inch image from just 5.8 to 8.7 feet away, making it a genuine short-throw living room projector.

How bright is the TK705STi and is it good for gaming?

It delivers 3,000 ANSI lumens and, at 4K/60Hz with ALLM support, an ultra-low 5ms input lag, making it a strong choice for both movie nights and console gaming.

Does the TK705STi have built-in streaming apps?

Yes, it has built-in Google TV, giving direct access to Netflix, YouTube, Prime Video and more without extra hardware.

How long does the TK705STi's light source last?

Its maintenance-free 4LED light source is rated up to 30,000 hours in Eco mode, so there are no lamps to replace.

What warranty comes with the TK705STi?

It's covered by a 3-year (36-month) warranty.

How quickly can TopAV deliver the TK705STi?

It's in stock at TopAV, so dispatch is within 2 working days, with free standard UK delivery on this order value.

Delivery & returns

Estimated delivery 10 Oct - 14 Oct. 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.

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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.

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Purchase order & invoice terms