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Optoma EX525ST

Optoma EX525ST
alaScore 81

15 reviews

Jul, 2018

alaTest has collected and analyzed 15 reviews of Optoma EX525ST. The average rating for this product is 4.7/5, compared to an average rating of 4.2/5 for other Projectors for all reviews. People are impressed by the size and design. The usability and image quality also get good opinions.

noise, image quality, usability, design, size

We analyzed user and expert ratings, product age and more factors. Compared to other Projectors the Optoma EX525ST is awarded an overall alaScore™ of 81/100 = Very good quality.

Review analysis

(Based on 15 reviews)

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User Reviews  

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Consumer review ( review summary for Optoma EX525ST


alaTest has collected and analyzed 7 user reviews of Optoma EX525ST from The average user rating for this product is 5.0/5, compared to an average user rating of 4.2/5 for other Projectors on Reviewers are impressed by the design and usability. The image quality and noise also get good feedback.

noise, image quality, usability, design

100% of the reviews on give this product a positive rating.

This summary is based on the products: EX525ST DLP Proj XGA 6:1 2500 Lumens 9.5LBSEX525ST DLP Proj XGA 6:1 2500 Lumens 9.5LBS

Jul, 2018

Expert review by (

Optoma EX525ST Review


The EX525ST is uniquely tailored to be a fantastic classroom projector.

Consumer review (

Optoma EX525ST


clear instructions

need to find a case for it

Nov, 2009

Consumer review (

Optoma EX525ST


Powerful. Large and clear image at relatively short distance.

A bit bulky to handle

Jun, 2009

Consumer review (



Lens throw is an important factor when picking a projector. People often overlook this feature though. I've owned 3 of these for 7 months now.

Short throw lens. Can throw a very large wall size image without having to be used in an excessively deep room. 100" projection at 4 foot throw. If you want wall sized projection look for "short-throw" projectors like this one

The projector housing is a bit larger than I envisioned while researching it online. DVI and VGA input but no HDMI. Only 1024x768 native, but the internal scaler works well up to 1080p

Mar, 2010

Product Specifications

The pinnacle of image excellence and flexible projection; the EX525ST produces large screen projection from short distances. At 2500 lumens, this native XGA projector pools impressive on-board technology for unbeatable performance on business and education platforms.

Audio Output





Cable lock slot:Kensington
Ceiling mountable: Yes
Colour of product:Black

Dimensions & Weight



Display number of colours:1.073 billion colours

Display (Projector)

Class:Digital projector
Colour Support:24-bit (16.7 million colours)
Display Resolution Abbreviation:XGA
HD Image Format:720p
High Definition:High Definition
Image Brightness:2500ANSI lumens
Image Contrast Ratio:2500:1
Max Image Size:7.72m / 772cm
Max Resolution:1024 x 768
Max Screen Distance:3.7m
Min Image Size:1.04m / 104cm
Min Screen Distance:0.5m
Native Aspect Ratio:4:3
Recommended Use of Projector:Presentation and multimedia
Type:DLP Projector


Compatibility:Mac / PC
Manufacturer:Optoma Technology
Packaged Quantity:1
Product Line:Optoma


Bulb power:200 / 230
Service life of lamp:3000 / 4000
Service life of lamp (economic mode):4000 / 5000

Lens System

Digital Zoom:2
Focal length range (f-f):0 - 10.2 / 6.97
Throw ratio:0.6:1


Built-in speaker(s): Yes
Number of built-in speakers:1
RMS rated power:10 / 8
Video formats supported: No


Ethernet LAN: No
Wi-Fi: Yes

Operational conditions

Operating relative humidity (H-H):0 - 85 / 5 - 85
Operating temperature (T-T):5 - 35 / 5 - 40
Storage temperature (T-T):5 - 35

Other features

Aspect Ratio:16:10 / 4:3, 16:9 / 4:3, 16:9, 16:10
Audio output:1
Connectivity Technology:Wired
Dimensions (WxDxH):324 x 234 x 97 / 339 x 276 x 122
Lens focal range:0 - 2.55 / F/2.59
Power requirements:100-240V / 100-240V, 50-60 Hz / 100-240V, 50-60Hz
Power supply type:100-240V, 50-60 Hz
Projection lens:F/2.55; f=10.19mm / F/2.59; 0.73mm - 6.97mm
Resolution:1600 x 1200
Weight (imperial):6.393

Packaging Content

Handheld remote control: Yes


Horizontal scan range:15 - 91 / 91
Noise Level:29 / 30
Vertical scan range:25 - 85 / 56

Ports & interfaces

AC (power) in: Yes
Audio (L,R) in:1
Audio (L,R) out:1
Component video (YPbPr/YCbCr) in:1
Composite Video In:1
DVI port:No / Yes
Ethernet LAN (RJ-45) ports:1
HDMI ports quantity:1
RS-232 ports:1
S-Video inputs quantity:1
Serial interface type:RS-232
USB 2.0 ports quantity:1
VGA (D-Sub) ports quantity:1


Power Consumption (Standby):1 / 5
Power consumption (typical):230 / 280


Contrast ratio (typical):2500:1 / 3000:1
Keystone correction, horizontal:18
Keystone correction, vertical:-15 - 15 / -20/20 / 18 / ± 15
Matrix size:1.4 / 1.42 / 1.65
Number of Colours:1.073 billion colours / 16.78 million colours
Projection distance:0.5 - 5 / 0.5/3.7
Projection Technology:DLP
Projector brightness:2500
Projector native resolution:WXGA (1280x800) / XGA (1024x768)
Screen size compatibility:26.4 - 196.1 / 303.75 / 818.9 - 8189.2

Projector Lamp

Bulb life cycle:3000hour(s)


3D: Yes
Analog signal format system:NTSC, PAL, SECAM
Full HD: No
HD-Ready: Yes

Video Input

Analogue Video Format:M-NTSC / NTSC 3.58 / NTSC 4.43 / PAL-B/G / PAL-D / PAL-H / PAL-I / PAL-M / PAL-N / SECAM / SECAM B/G / SECAM D/K / SECAM K1 / SECAM L
Analogue video Signal:Component video / Composite video / RGB / S-Video
Digital Video Standard:Digital Visual Interface (DVI)

Weight & Dimensions

Weight:2.9 / 4.3