BenQ TH671ST Projector
- In UK stock, ships from the UK
- UK manufacturer warranty
- UK-based engineers
- No import duty or customs charges
- GBP pricing, UK VAT invoices
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Description
The BenQ TH671ST is a short-throw Full HD DLP projector built for rooms where a long throw distance isn't practical. It projects a 100-inch image from as close as 4.9 feet, making it well suited to smaller living rooms and rooms where the projector needs to sit close to the screen, including golf simulator setups. With 3,000 ANSI lumens and a 10,000:1 contrast ratio, it delivers a bright, punchy image for movies, TV and gaming, backed by dedicated Cinema, Game, Sport and Vivid TV picture modes. Input lag is rated at 16.7ms at 1080p/60Hz, keeping fast-paced console gaming responsive. Dual HDMI inputs (including MHL support), a 5W speaker, auto vertical keystone correction and 1.2x zoom round out a flexible, easy-to-install projector for entertainment spaces where distance from the screen is limited.
Key features
Projects a 100-inch image from just 4.9 feet, ideal for compact rooms.
Bright, punchy DLP image with a 10,000:1 contrast ratio for movies and gaming.
16.7ms input lag at 1080p/60Hz keeps console gaming responsive.
Two HDMI inputs including MHL support for flexible device connections.
Technical specifications
Throw distance guide
With its 0.69–0.83:1 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.
| Image size | Image dimensions | Lens distance range |
|---|---|---|
| 60" | 1.33 m × 0.75 m | 0.9 m – 1.1 m |
| 80" | 1.77 m × 1.00 m | 1.2 m – 1.5 m |
| 100" | 2.21 m × 1.25 m | 1.5 m – 1.8 m |
| 120" | 2.66 m × 1.49 m | 1.8 m – 2.2 m |
| 150" | 3.32 m × 1.87 m | 2.3 m – 2.8 m |
Planning from a real wall? Use the projector room planner to upload a photo, preview the image to scale and find projectors that fit within your maximum available space.
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.
Documents
Frequently asked questions
How short is the throw on the TH671ST?
It projects a 100-inch image from just 4.9 feet away, making it well suited to smaller living rooms and golf simulator setups where the projector needs to sit close to the screen.
How bright is the TH671ST and what's the contrast ratio?
It delivers 3,000 ANSI lumens with a 10,000:1 contrast ratio for a bright, punchy DLP image at full HD 1080p.
Is the TH671ST good for console gaming?
Yes, input lag is rated at just 16.7ms at 1080p/60Hz, and it has a dedicated Game picture mode alongside Cinema, Sport and Vivid TV modes.
How long does the lamp last?
The lamp is rated for up to 15,000 hours.
What warranty and delivery does the TH671ST come with?
It's backed by a 3-year (36-month) warranty and is in stock at TopAV, so it's dispatched within 2 working days.
Delivery & returns
Estimated delivery 29 Aug - 2 Sept. UK mainland delivery only — some large or made-to-order items may carry longer lead times.
Unused items in original packaging can be returned within 14 days of delivery. Faulty items are covered under manufacturer warranty.
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.
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 — no card payment required. Purchase orders and credit terms are for education customers only.
All transactions are processed over an encrypted, secure checkout.
Need help specifying this for your space?
Ask Andrew — he knows the full catalogue and can advise on installation, mounting and compatible AV systems.