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BenQ TH681 DLP Full HD 1080p 3D Projector (Used)

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Quoting product code: B06QL


About this product


Product overview

• 3,000 lumens of light lets you present in environments that have ambient light
• Achieve a 78.3 inch screen at a distance of 2m with the throw ratio being 1.15 to 1.5:1
• 1080p (1920 x 1080) resolution and native aspect ratio of 16:9 results in an amazingly detailed widescreen picture
• Under SmartEco mode, brightness is altered automatically to extend your lamp life to 6,500 hours
• Connect to a range of visual and audio devices through the HDMI, 2 x VGA, composite video, S-Video, 3.5mm audio jack, twin phono (RCA) and RS232 ports
• Display the projected content on another monitor using the VGA out port
• 10W mono speaker provides great sound without having to plug external speakers in
• Use your own speakers through the 3.5mm audio jack or twin phono (RCA) connections
• 33dBA of sound ensures your presentations and cinematic viewings aren’t disturbed when it is situated a good distance away
• Obtain your desired screen size easily by mounting the projector to the ceiling

Special features
• Watch in incredible 3D using DLP link 3D glasses (sold separately)
• Manual vertical keystone correction fixes a distorted picture
• Economic (Eco) and SmartEco modes reduce the brightness of the lamp, lowering power consumption and therefore extending the lamp life

Would this projector be the right choice for me?
Enjoy four times the amount of detail (when compared to 480p) on this 1080p BenQ projector. It comes with plenty of connections, and is ideal for any classroom or office environment. Bring a whole new learning experience to the classroom with a projector that can support 3D functionality. All that is needed is 3D content and some DLP link 3D glasses (sold separately, please see our range here). The majority of times, projectors are cast onto a whiteboard or blackboard. This projector also allows you to project teaching templates onto the board, such as lines for when learning to write letters for the first time, normal notepad style lines and coordination lines for mathematics. This makes it easier for students to follow and makes learning much more interactive. Built-in is a 10W mono speaker that delivers great sound, although you can use your own sound system by plugging it into the 3.5mm audio out port.

What is the picture quality like on this projector?
The full HD 1080p image projected contains amazing detail and clarity. In addition, a 10,000:1 contrast ratio ensures that darker colours appear deeper, which attributes to a more focused and cleaner overall image quality. This means that presentations will be easier to read even if you were to sit in the back row of a venue. A native aspect ratio of 16:9 supplies you with a widescreen picture, with 4:3 and 16:10 aspect ratios available too. Regardless of the amount of ambient light in the room, you will still be able to host and view presentations with the finest details thanks to the 3,000 lumens of light.

How difficult will it be for me to achieve my desired screen size?
The throw ratio of the projector is 1.15 to 1.5:1, which gives you the ability to set the projector 2m away for a screen size of 78.3 inches. For an even bigger screen size, you can move back to 7.74m and obtain a screen that is 235 inches wide. To make getting your chosen screen size even easier, you can mount this projector to the ceiling with a compatible ceiling mount (sold separately), which would remove the need to clear the projectors path to the screen. If the projector isn’t perpendicular to the screen it could lead to distortions of the image (a wider image at the top or bottom), which can be corrected with the manual vertical keystone correction.

What interfaces can I connect to?
Capable of connecting to a range of devices, this projector has ports for HDMI, two VGA, composite video, S-Video, USB mini B, 3.5mm audio jack, twin phono (RCA) and RS232 connections. A USB mini to USB cable (not included) can be used to connect your laptop or computer to the projector, and you can then use the projector’s controller to manipulate any programs that utilise page up or down commands i.e. Microsoft PowerPoint. Controlling the projector from a distance or central computer is possible too, by using a RS232 cable (not included). A VGA output socket lets you send your projected content to a monitor.

Does this projector have any eco modes?
Eco modes are a great way to extend the life of a lamp, saving you time and money on maintenance costs. This projector has two. Economic mode dims the lamp and reduces the fan noise, decreasing power consumption and extending lamp life. SmartEco mode provides uncompromised brightness and great picture quality. Under this mode, lamp power is automatically altered so that only necessary levels of light are used, maximizing power saving while still delivering the best contrast and brightness performance. The projector can additionally be set to automatically turn off when a display source isn’t detected to further increase lamp life.


Input Connections HDMI, 2 x VGA, Composite video, S-Video, USB Mini B, 3.5 mm audio jack, twin phono (RCA), RS232
Supported formats Video: N/A
Audio: N/A
Picture: N/A
Document Viewer: N/A
Wireless connection No
Output Connections 3.5 mm earphone out, VGA
Speakers 1
Audio output 10 W
Mono / Stereo sound Mono
Sound enhancement N/A
Projection technology DLP
3D Optional with 3D glasses (not included)
Resolution 1920 x 1080 pixels (Full HD/1080p)
Screen size 40 inches to 235 inches
Aspect ratio 16:9 (native), 4:3, 16:10
Brightness 3,000 lumens
Contrast ratio 10,000:1
Focus Manual
Projection distance 0.93m to 7.74m
Lamp 210 W
Lamp life 4,000 hours, 5,000 hours (Eco mode), 6,500 hours (SmartEco mode)
Video compatibility NTSC / PAL / SECAM
Mountable Yes – ceiling
VESA mount dimensions N/A
Brand BenQ
Model name / number TH681
Colour Black and white
Dimensions (W x D x H) 311.81 mm x 244.12 mm x 104.7 mm
Power consumption 315 W
Power requirements 100 V to 240V, 50 Hz to 60 Hz
Manufacturer’s warranty 2 Years
Weight (unpacked) 2800 g
Operating temperature 0°C to 40°C
Noise level 33 dBA, 28 dBA (Eco mode)
Package contents
TH681 Projector
VGA (D-sub 15pin) cable
Remote control with batteries
Power cable
Quick start guide
Warranty card

Can this projector be ceiling mounted?

Asked by: AdeSquires
Yes the projector can be used with a ceiling mount (sold separately) there is a flip option in the menu that spins all menus and picture output through 180°
Answered by: Les
Date published: 2016-02-25

Hi - what does 'used' mean please? Display model, demo?  Also what type of bulb is used in this product? Do you stock them and if so, how much please?

Asked by: Fizzazz
B-Grade items include used and unused returned products, end of line, slightly marked or refurbished products. To ensure peace of mind each product comes with our 12 month guarantee having been fully tested by our team of in-house technicians. What's even more attractive, all of the B-Grade products are reduced in price! And unfortunately we do not stock replacement bulbs.
Answered by: Brad
Date published: 2015-12-14
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