BenQ AK900ST vs Christie CP2406-RBe

BenQ AK900ST is quieter.

	BenQ AK900STMSRP $5,999	Christie CP2406-RBe

Key differences
White light output
White light output	6,000 lm ANSI	—
Native resolution
Native resolution	—	2048 × 1080
Throw ratio
Throw ratio	0.81–0.89:1	—
Lowest input lag
Lowest input lag	4.8 msDerived	—
HDR formats
HDR formats	HDR10, HLG	—
Fan noise
Fan noise	Normal 34 dB(A) · Eco 29 dB(A)	Max 50.9 dB(A) · Normal 49 dB(A)
MSRP
MSRP	$5,999	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.8–2.0 m	—
Picture
White light output
White light output	6,000 lm ANSI	—
Claimed brightness (non-standard)
Claimed brightness (non-standard)	—	Up to 6,000 lm
Imaging technology
Imaging technology	DLP	DLP
Chip / panel diagonal
Chip / panel diagonal	0.47 in	0.69 in
Native resolution
Native resolution	—	2048 × 1080
Native aspect
Native aspect	16:9Derived	17:9Derived
Pixel shift
Pixel shift	Yes (scheme not stated)	—
Addressable resolution
Addressable resolution	4K UHD (3840 × 2160)	—
Dynamic contrast
Dynamic contrast	3,000,000:1	—
Colour gamut
Colour gamut	Rec. 709 97% coverage	—
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	—
Gamma / EOTF presets
Gamma / EOTF presets	2.2, 2.4, 2.6	—
HDR formats
HDR formats	HDR10, HLG	—
3D
3D	—	Yes
3D formats
3D formats	—	Frame packing, Top-bottom
Light source
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Light engine
Light engine	—	Phazer laser phosphor light source
Light-source life
Light-source life	20,000 h normal · 30,000 h eco	Over 50,000 h
Light output control
Light output control	Continuous	—
Constant brightness mode
Constant brightness mode	—	Yes
Cool-down time
Cool-down time	About 15 s	—
Optics
Throw ratio
Throw ratio	0.81–0.89:1	—
Image size
Image size	95–300 in	—
Zoom
Zoom	Optical	—
Zoom ratio
Zoom ratio	1.1×Derived	—
Focal length
Focal length	8.6–9.4 mm	—
Aperture (f-number)
Aperture (f-number)	1.83–1.86	—
Focus
Focus	Motorised	Motorised
Autofocus
Autofocus	Yes	—
Autofocus runs
Autofocus runs	On demand	—
Vertical lens shift
Vertical lens shift	±60%	—
Horizontal lens shift
Horizontal lens shift	±23%	—
Motorised lens shift
Motorised lens shift	No	Yes
Lens memory slots
Lens memory slots	5	—
Vertical keystone
Vertical keystone	30°	—
Horizontal keystone
Horizontal keystone	30°	—
Auto keystone
Auto keystone	Yes	—
Corner correction
Corner correction	4-corner	—
Grid warp
Grid warp	Yes	Yes
Auto setup
Auto setup	Fit to screen	Fit to screen
Interchangeable lens
Interchangeable lens	—	Yes
Motion & gaming
Max input refresh
Max input refresh	1080p: 240 Hz · 4K UHD: 60 Hz	—
Input lag
Input lag	1080p: 60 Hz 18.6 ms · 120 Hz 9.7 ms · 240 Hz 4.8 ms · 4K UHD: 60 Hz 18.1 ms	—
Gaming features
Gaming features	ALLM	—
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.1 (HDCP 2.3) · HDMI 2.1 (eARC, HDCP 2.3)	2 × HDMI 2.0 (HDCP 2.2)
Max input resolution
Max input resolution	4K UHD	DCI 4K
Control ports
Control ports	RS-232	—
Horizontal scan
Horizontal scan	15–270 kHz	—
Vertical scan
Vertical scan	23–240 Hz	—
Smart platform
Ethernet
Ethernet	Yes	Yes
Casting
Casting	Miracast	—
Audio
Speaker power
Speaker power	20 W	—
Speakers
Speakers	1	—
Layout
Layout	Mono	—
Audio outputs
Audio outputs	3.5 mm	—
HDMI audio return
HDMI audio return	eARCDerived	—
Physical & installation
Dimensions (W × D × H)
Dimensions (W × D × H)	521 × 351 × 166 mm	—
Weight
Weight	10,200 g	Up to 62,100 g
Ceiling mount
Ceiling mount	M4	—
Exhaust
Exhaust	—	Side
Dust filter
Dust filter	—	Washable
Ingress protection
Ingress protection	IP5X	—
Sealed optical engine
Sealed optical engine	—	Yes
Environment & power
Operating temperature
Operating temperature	0–40°C	10–35°C
Operating humidity
Operating humidity	10–90%RH	10–80%RH
Altitude
Altitude	3,000 m · high-altitude mode	3,000 m
Power draw
Power draw	348 W	Max 1,200 W · Normal 559 W
Standby
Standby	Up to 0.5 W	Up to 3 W
Networked standby
Networked standby	Up to 2 W	—
Mains input
Mains input	100–240 V · 50/60 Hz	200–240 V · 50/60 Hz
Fan noise
Fan noise	Normal 34 dB(A) · Eco 29 dB(A)	Max 50.9 dB(A) · Normal 49 dB(A)
Safety & support
Laser class
Laser class	Class 1	Class 1
Risk group
Risk group	RG2	—
Warranty
Warranty	3 yr	—
User manual
User manual	https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20CONSUMER/UserManual/AK900ST/AK900ST_UM_EN_260915154537.pdf	https://www.christiedigital.com/globalassets/resources/public/020-103949-03-Christie-LIT-MAN-USR-CineLifePlus2K.pdf
Spare parts
Spare parts	—	Air filter 003-004655-XX · Air filter 003-004654-XX · Air filter 003-007541-XX · Air filter 003-007542-XX
In the box
In the box
In the box	Power cord, Remote, Quick start guide, User manual	—