Optoma UHD55 vs Optoma UHD38:What Are the Differences?

Optoma UHD55 and Optoma UHD38 are both 4K projectors, but they have different brightness, contrast ratio, throw ratios, and smart features.

Compared with Optoma UHD38, Optoma UHD55 is better in terms of image contrast, shorter throw ratio, and smart features like voice assistants.

Product Name

Optoma UHD55

Optoma UHD38

Product Image Optoma UHD55 Optoma UHD38
Price $1,799.00 $1,449.00
Our Rating 8.5 8.5
Brand Optoma Optoma
Category projector projector

Optical Parameters

Optoma UHD55Optoma UHD38
Brand Brand Optoma Optoma
Brand Model Brand Model Optoma UHD55 Optoma UHD38
Brightness (ANSI lumens) Brightness (ANSI lumens) 3,600 ANSI lumens 4,000 Lumens
Display Chip Display Chip 0.47" DLP x 1
Display Technology Display Technology DLP DLP
Standard Resolution Standard Resolution 3480 x 2160 3840x2160
Maximum Supported Resolution Maximum Supported Resolution 3480 x 2160 3840x2160
Image Contrast Ratio Image Contrast Ratio Dynamic Contrast Ratio: 1,200,000:1 1,000,000:1
Throw Ratio Throw Ratio 1.21:1 - 1.59:1 1.50:1 - 1.66:1 (D:W)
Keystone Correction Keystone Correction Horizontal & Vertical Horizontal/vertical+/-40°
Lamp Life Lamp Life 4,000 hours / 15,000 hours (Eco) 4,000 hours / 15,000 hours (Eco)
Lamp Type Lamp Type Metal Halide bulb 240W Metal Halide bulb

Focus technology Focus technology manual focus manual focus

Projection Parameters

Optoma UHD55Optoma UHD38
Product type Product type Home theater Home theater
Image Size Image Size,projector1 34.03" - 302.22" 33" ~ 300"
Screen ratio Screen ratio 16:9 (4K HD)
Screen color Screen color 10-bit
3D Stereoscopic film is a type of film that was first introduced in Hollywood on May 24, 1953 when stereoscopic films appeared. Full HD 3D Full HD 3D
Sound System Sound System 10.0 Watts Mono 10.0 Watts Mono
Projection method Projection method Rear, forward, table, ceiling


Optoma UHD55Optoma UHD38
I/O Connection Ports Connection Ports 12-Volt Trigger
Audio In: Mini Jack
Audio Out: Optical
HDMI 2.0
Network: RJ-45
RS232: DB-9pin
USB x 2
VGA In: Dsub-15pin
Wireless Networking
Inputs 2 x HDMI 2.0, 1 x VGA (YPbPr/RGB), 1 x Audio 3.5mm
Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A
Control 1 x RS232, 1 x 12V trigger


Optoma UHD55Optoma UHD38
Size(HxWxD) Size(HxWxD) 115 x 315 x 254mm 12.4" x 10.63" x 4.65"
Power Usage Power Usage 330 Watts 202W~305W
Noise Level Noise Level 26dB 26dB
Machine weight Machine weight 5.09kg 3.97kg
Accessories Accessories AC power cord
Remote control with CR2025 battery
Quick start user manual
WUSB wireless adapter
AC power cord
Remote control
2x AAA batteries
Basic user manual
Warranty Warranty 1 Year
other other Frame Interpolation
Amazon Alexa
Streaming Apps
Google Assistant
Input lag: 4K/60: 16.9ms | 1080p/240: 4ms
4.20ms input lag at 1080P, 16ms at 4K