BenQ MX631ST Short Throw Projector Review

The BenQ MX631ST is a short throw projector intended for use in classrooms or conference rooms.  It is a single chip DLP XGA projector that in its brightest mode is specified to produce 3200 lumens and its lamp is rated to have an unsually long life of up to 10,000 hours, in SmartEco mode.  Even when operated in the full power (i.e, “normal”) mode, the lamp is rated at a fairly long 4,500 hours life.

This is a XGA resolution projector (i.e., 1024 x 768) with a 4 x 3 aspect ratio as is typical for many entry-level business and classroom projectors.  However, since many classrooms and conference rooms are already equipped with 4 x 3 aspect ratio projection screens, the MX631ST is certainly a viable choice when replacing an existing XGA projector.

BenQ describes the MX631ST as follows:

“Designed to deliver crisp, bright, larger-than-life images from a short projection distance, the BenQ MX631ST is ideal for use in places where space is at a premium such as small conference rooms, training rooms and classrooms. With a powerful 3200 ANSI lumens bright image and an impressive 13000:1 contrast ratio, razor sharp image and rich, accurate colors, the MX631ST will help you present your best.

With a street price of under $550 and a rated brightness of 3200 lumens, the MX631ST directly competes against 3LCD and other single chip DLP projectors from a variety of other companies.  In fact, this is one of the most crowded segments of the projector marketplace, and represents what is essentially entry-level for a a relatively bright business or classroom projector.

We wish to thank Epson America for sponsoring this year’s Best Classroom Projectors report.


  • Long lamp life – up to 10,000 hours
  • Short throw design supports placement fairly close to the screen (e.g., 1 screen width)
  • Two HDMI inputs, one support MHL 2.0
  • XGA resolution (1024 x 768) and 4 x 3 Aspect Ratio
  • Built-in 10 watt speaker
  • 3D support compatible with Blu-ray 3D sources
  • Produces relatively high image contrast, for this class of projector

Current dealer prices for BenQ MX631ST

Seller State tax Price Description
Projector People 
Projector People
FL 499.00 Free Shipping! In Stock Now! 30 day no-hassle guarantee and FREE lifetime tech support from projector experts. We are an authorized dealer.
Visual Apex 
Visual Apex
WA 529.00 Free 2day Shipping! Save Today and experience exceptional customer service, expert advice, timely delivery, free tech support and your best price from an Authorized Dealer!

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News and Comments

  • kiamarakid

    AVOID BenQ – Hi I have purchased a BenQ MW820ST short throw projector. It is rubbish, it failed on the 3rd time it was switched on, Benq refused to replace it because it had been purchased 28 days and there warrantee is only 21 days, so I sent it back. It came back ‘repaired’ and it still does not work. Now they are offreing a refurbished projector which I do not want as the lamp life will be completely unknown.

    They don’t seem to have a ‘Customer Services’ department and it shows.I am buying 4 more projectors but they will not be from BenQ Avoid them like the plague

    John T