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White rectangular DLP projector with front lens and top controls

OPTOMA

OPTOMA ZK451 4500 lm 4K UHD home theater projector

SKU CH-Z72J-164E2 MPN ZK451

A 4K UHD laser projector delivering 4500 lumens brightness and a 2,000,000:1 contrast ratio with a 30,000-hour lamp life

  • TypeDLP Projector
  • LampLaser, 30000 Hour (Economy Mode)
  • Aspect Ratio16:9
  • Display Size30 in to 25 ft (diagonal)
  • Native Resolution2160p (3840 x 2160)
  • Brightness4500 lm
  • 4K UHD resolution with 3840 x 2160 native pixels
  • Laser light source rated 30000 hours in economy mode
  • 4500 lumens brightness for vivid images in lit rooms
  • 2,000,000:1 contrast ratio delivers deep blacks and bright highlights
  • HDMI, RJ-45 and USB connectivity plus built-in speakers

Laser 4K UHD projector for home cinema

The Optoma ZK451 is a DLP projector with a laser light source rated for 30000 hours in economy mode. It delivers a native 2160p resolution at 4500 lm brightness and a 2000000:1 contrast ratio. The 16:9 aspect ratio suits widescreen films and streaming content. Built-in speakers provide audio without external hardware.

Check room size and connectivity before purchase

Throw distance ranges from 39.37 in to 32.81 ft with a focal length of 20.91 mm to 32.62 mm, so measure your space to hit a 30 in to 25 ft diagonal image. Video input is HDMI only; network control uses RJ-45 and a USB port is present. Power draw is 178 W operating and 500 mW standby at 60 Hz.

Laser light source maintains output over long

The solid-state laser avoids the brightness decay typical of lamp projectors during extended viewing. Fan noise stays consistent because the light engine does not require high-voltage ignition cycles. Heat output is tied to the 178 W operating figure, so ventilation should match that sustained load. Economy mode stretches the 30000-hour rating across daily use.

Highlights

  • 4K UHD resolution with 3840 x 2160 native pixels
  • Laser light source rated 30000 hours in economy mode
  • 4500 lumens brightness for vivid images in lit rooms
  • 2,000,000:1 contrast ratio delivers deep blacks and bright highlights
  • HDMI, RJ-45 and USB connectivity plus built-in speakers

Specifications

BrandOptoma Technology
ModelZK451
Part NumberZK451
TypeDLP Projector
LampLaser, 30000 Hour (Economy Mode)
Aspect Ratio16:9
Display Size30 in to 25 ft (diagonal)
Native Resolution2160p (3840 x 2160)
Brightness4500 lm
Contrast Ratio2,000,000:1
Throw Distance39.37 in to 32.81 ft
Focal Length20.91 mm to 32.62 mm
Input Video ConnectorsHDMI
Network ConnectorsRJ-45
USBYes
Built-in SpeakersYes
Power Supply60 Hz
Power ConsumptionOperating: 178 W; Standby: 500 mW
Dimensions8.5 in (W) x 10.8 in (D) x 4.3 in (H)
Weight6.39 lb
Package Contents4K UHD Laser Projector, AC power cord, Remote control, 2 x AAA batteries, Quick start user manual
Shipping weight4.26 kg
Package size401 × 282 × 157 mm

Questions about this item

What comes in the box with the ZK451 and do I need to buy cables separately?

The box contains the 4K UHD laser projector, an AC power cord, a remote control with two AAA batteries and a quick-start manual. An HDMI cable for video sources is not included.

The ZK451 is listed with a single 4K UHD specification — are there other resolution or brightness versions to choose from?

This model is offered only in the 3840 x 2160 native resolution with 4500 lm brightness; no alternative resolution or lumen configurations exist for the ZK451.

How does the 4500 lm brightness perform in a typical living room with some ambient light?

At 4500 lm the ZK451 delivers a bright 2160p image up to 25 ft diagonal even with moderate room lighting, while the 2,000,000:1 contrast ratio preserves shadow detail in darker scenes.

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