Acer K138STi
Acer K138STi
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Overall Score

Acer K138STi

An economical to run 100000:1 280 x 800 projector with adequate features
100000:1 WXGA (1280x800) No 33dB Mar 2016
Contrast Ratio (typical) Projector Native Resolution 3D Noise Level Release Date

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Acer K138STi Review

With very low running costs and at under 2 years old, we have scored the Acer K138STi as follows for Summary.
Average Features
17 Months Old
£26 Over 1 Year
Overall Score

Why Has it Scored 48?

Sony projectors have excellent reviews in general.
At over a year old this projector is slightly out of date, and newer multimedia projectors with more up to date technology are available. View the latest projectors 2017.
It has running costs of only £26 over 1 year, which puts it in the cheapest 4% of all 1,763 data projectors that we have compared it to.
This projector has some good features, but is also missing a few features:
Quite long service life of lamp
Only 280 x 800 resolution
Very dim projector brightness

Acer K138STi In-Depth Analysis


Very Good Brand

We checked 980 owner and expert reviews (including 192 verified purchases) for Acer projectors and found that on average Acer has very good ratings. 93% of those that bought a Acer projector would recommend the product that they bought to other buyers.



The K138STi is HD-Ready. 79% of projectors are not HD-Ready.

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Only 280 X 800 Resolution

The K138STi has a 280 x 800 projector native resolution which is higher than most projectors. Most projectors have a WXGA (1280x800) resolution.

A DCI 4K (4096 x 2160) resolution is the best resolution amongst similar types of data projector.

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Very Dim Projector Brightness

The projector brightness of the K138STi of only 800 ANSI lumens is in the dimmest 7% of all projectors when ranked by this feature. The average projector brightness of all projectors is 3,700 ANSI lumens, with the dimmest being 12 ANSI lumens and the brightest being 85,000 ANSI lumens.

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Quite Long Service Life of Lamp

The K138STi's service life of lamp of 20,000h is quite long compared to most other projectors. It is in the longest 8% of all projectors when ranked by this feature. The service life of lamps of projectors range from 20h to 40,000h, and the average service life of lamp is 6,800h.

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Does Not Have a Built-In Speaker

The K138STi does not have a built-in speaker, unlike 76% of projectors which have a built-in speaker.

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Has a Card Reader Integrated

The Acer K138STi has a card reader integrated, unlike 95% of projectors which do not have a card reader integrated.

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Average Noise Level

The K138STi's noise level of 33dB is fairly standard compared to most other projectors. It is in the loudest 34% of all projectors when ordered by this feature.

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The K138STi is 3D-ready, which is unusual. 85% of projectors are not 3D-ready.

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Released 17 Months Ago

This data projector was released in March 2016.

Running Costs

Running Costs Are Very Low

The K138STi has an average 1 year running cost of only £26 based on passable energy prices and usage levels, which makes it one of the cheapest to run projectors.

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Product Identifiers

Manufacturer Part Numbers acer p251461p, acer k138sti
Barcodes 04713392225680
9dB quieter noise level
34% longer service life of lamp
11% cheaper to run
46% dimmer projector brightness
18% quieter noise level
Dimmer projector brightness
34% longer service life of lamp
£1.12 cheaper to run
1dB quieter noise level
Five months older
10h longer service life of lamp
Quieter noise level
799x dimmer projector brightness
10h longer service life of lamp
Dimmer projector brightness