Acer K750

Score

Sections

Pros

  • Surprisingly decent contrast performance
  • Pictures are very sharp
  • Massive lamp life

Cons

  • Green bias when run brightly
  • Some noise during dark scenes
  • Missing shadow detail

Key Features

  • Review Price: £1250.00
  • Laser/LED hybrid projector
  • Full HD native resolution
  • 20000-hour lamp life
  • Optical zoom
  • Claimed 1500 Lumens of brightness

What is the Acer K750?

The K750 could be the future of

projection. In one fell swoop it hopes to banish the lifespan problems

of traditional UHP lamps, the expense and brightness issues of LED

lamps, and the eyesight safety concerns associated with laser-based

lighting. How? By creating a DLP projector with a hybrid light system

that combines red and blue LEDs, with a blue laser reflected from a

phosphor ‘disc’ to produce green.

Deflecting the laser off the

phosphor disc reduces its intensity enough to prevent it damaging eyes

that might accidentally look down the lens, and applying it to the green

colour element should also help boost the projector’s overall

brightness.

It all sounds very clever. But does the K750 sidestep the performance

issues we’ve previously seen attached to laser-based projection

technologies?

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Acer K750

Acer K750 – Design and Features

The

K750 is seriously attractive. It combines a high-gloss top panel with

an embossed silver Acer logo and grille-riddled matt grey edges, while

its rounded corners give it soft, living-room-friendly finish. The K750

isn’t pitched exclusively as a home cinema projector, though; it’s

reckoned to be up to data duties, too.

Given the K750’s

affordable price, it’s remarkably heavy and robustly built, hinting at

some quality internal componentry. Unless this is just the sort of

weight and build quality you get as standard with an effective hybrid

projection system.

Connections are a little on the rudimentary

side, comprising two HDMIs, a 3mm audio in/out loop, a VGA input, an

S-Video input (yes, these still exist), a composite video port, and an

RS-232 port for system integration.

We’re starting to expect USB

sockets and even Wi-Fi on modern data projectors these days, but we

guess we could see our way to forgiving their absence on the K750 if its

new-fangled projection system delivers the picture goods.

Putting

more meat on the bones of what the hybrid projection system in the K750

really means in practical terms, perhaps the most eye-catching spec is a

claimed lamp life of 20,000 hours. This is between five and a whopping

10 times as long as you can expect with normal projection lamps – and

you shouldn’t experience anywhere near the same reduction in picture

quality over that time as you get with UHP lamps, which can lose as much

as 50% of their brightness after a year’s typical use.

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Acer K750

As

for the amount of brightness on offer, Acer claims 1500 Lumens. This

isn’t actually as high as the figures claimed for some UHP-based budget

projectors, but it is bright by LED standards.

At first glance we

were also wowed by the K750’s claimed contrast ratio of 100,000:1. But

on reflection we suspect this figure will turn out to be more of a

reflection of the intense brightness delivered by the laser part of the

optics than a promise of brilliant black levels.

The K750 enjoys a

Full HD 1920 x 1080 native resolution and sports a fulsome suite of

picture-calibration aids which confirm that Acer’s projector has

(unusually) equal potential as both a data and a home cinema projector.

One

other key feature is Acer’s ColorBoost II technology, which combines an

“optimised” 6-segment RGBCYW colour wheel with image processing and

light manipulation to deliver what’s claimed to be a more natural colour

range – especially for video sources – as well as an ultra-vivid look

to very vibrant parts of the image.

There is one feature the

K750 doesn’t have, though: 3D playback. This is unfortunate given that

we still hold a spluttering flame for a good-quality 3D experience, but

we suspect 3D’s absence won’t be a deal breaker for too many other

people these days.

Acer K750 – Setup

The K750 offers a

reasonable amount of optical zoom to help you get its image in the right

place on your screen or wall, and all four of its tabletop legs can be

screwed down to different heights to help you get your angles right.

It’s

a bit disappointing, though, to discover that the K750 doesn’t carry

any optical vertical image shift, meaning that you may find it very

difficult to get the edges of your image straight without using keystone

correction – a technology which essentially distorts pictures to

achieve a perfect rectangular shape.

Acer K750

It’s also important to note that the K750’s lens is quite a long-throw affair, and so won’t suit small rooms.

The

K750’s menus are a bit longwinded in their design and are fiddly to

navigate via the unusually large but inconsistently responsive remote

control. They do, though, include a good selection of set up tools.

These include a Movie preset as well as data options, a dynamic contrast

mode, a black level extender, the DLP Brilliant Colour system for

enriched colour response, and a full suite of colour management tools.

Our

main setup advice would be that you start with the Movie preset but

increase the brightness by two or three notches to try and improve

shadow detail response. Leave off the Black Extension feature, change

the colour temperature to CT1 from its rather yellowy CT2 default, and

run the projector on its Eco setting when watching a film to both enjoy a

more natural, cinematic image and reduce fan noise.

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