Dahua Technology X74A3L Ultra Series Pentabrid 16-Channel 4K HD-CVI DVR_Diminsions
Dahua Technology X74A3L Ultra Series Pentabrid 16-Channel 4K HD-CVI DVR_Rear_View




Dahua Technology X74A3L8 Ultra Series Penta-Brid 16-Channel 4K HD-CVI DVR

  • Record from and Manage up to 16 Cameras
  • Up to 8MP Recording Resolution
  • 6 TB HDD Preinstalled
  • HD-CVI/AHD/HD-TVI/SD + IP Inputs
  • H.265+/H.265/H.264+/H.264 Compression
  • Two-Way Audio
  • Up to 128 Simultaneous Users
  • BNC Interface
  • 2 x HDMI, VGA, and BNC Video Outputs
  • ONVIF Compliant


Dahua X74A3L8 16 Channel HD-CVI PentaBrid 4K 1.5U Digital Video Recorder

Stream and record up to 16 video channels of video with the X74A3L8 Ultra Series PentaBrid HD-CVI DVR from Dahua Technology at resolutions of up to 8MP. Equipped with four SATA ports, each supporting an HDD up to 10 TB, this DVR can accommodate up to 40 TB of HDD storage (4 TB preinstalled). The recorder supports HD-CVI, AHD, HD-TVI, and SD analog cameras via its BNC interface. Additionally, it has a 16-channel IP video input for IP cameras up to 12MP. With the help of H.265+, H.265, H.264+, and H.264 compression, file sizes kept manageable while recording and playback quality maintained.

The DVR’s interface includes BNC ports for two-way audio communication, as well as HDMI, VGA, and BNC connections for video output with support for dual streaming to maximize bandwidth efficiency. The HDMI connection can output up to 4K UHD resolution video.

  • VGA output at up to 1920 × 1080 resolution
  • 4 TB HDD Preinstalled
  • HDMI output at up to 4K UHD resolution (3840 × 2160)
  • Records audio signals from HD-CVI cameras with built-in microphone via the BNC video input connection, easing installation
  • Volume control for live audio directly from on-screen menu
  • G.711 and PCM audio compression
  • 16 analog + 16 IP camera channels
  • Self-adaptive HD-CVI/AHD/HD-TVI/CVBS analog signal input
  • 8MP at 7 fps recording resolution on all HD-CVI channels
  • Supports IP cameras up to 12MP
  • Up to 128 Mb/s incoming bandwidth
  • Dual-stream video recording
  • Smart H.265+ and H.264 dual codec
  • 1 x USB 2.0 and 2 x USB 3.0 ports
  • Spot output channel for secondary monitor
  • Fish eye Dewar pings via web interface or Smart PSS
  • Point of Sale (POS) support
  • Smart fan design reduces fan noise and electrical consumption
  • Intelligent Video System (IVS) built-in video analytics allow monitoring for Tripwire detection, intrusion detection, and detection of abandoned or missing objects
  • Face detection functionality
  • Smart search
  • ONVIF Compliant

Data Sheet


Dahua X74A3L8 16 Channel HD-CVI PentaBrid 4K 1.5U Digital Video Recorder Data Sheet

Additional information

Weight 16.31 lbs
Dimensions 20.9 × 19.69 × 8.27 in



Main Processor Embedded Processor
Operating System Embedded Linux


Analog Camera Inputs 16 x BNC
HD-CVI 8 MP, 6 MP, 4 MP, 1080p at 30 fps, 720p at 60/30 fps
AHD 5 MP, 4 MP, 3 MP, 1080p/720p at 30 fps
TVI 5 MP, 4 MP, 3 MP, 1080p/720p at 30 fps
IP Camera Input 16 + 16 Channels, Each Channel up to 12 MP
Audio Input: 4 x BNC; Accepts Audio Signal via BNC Video Input if HD-CVI Camera Has Built-In Microphone
Output: 1 x BNC
Two-Way Talk Input: 1 x BNC, Mic
Output: 1 x BNC


Compression Smart H.265+, H.265, Smart H.264+, and H.264
Recording Resolution 8 MP, 6 MP, 5 MP, 4 MP, 3 MP, 4 M-N (1280 × 1440), 1080p, 720p, 960H, D1, and CIF
Recording Rate Main Stream: 8 MP at 7 fps; 6 MP at 10 fps; 5 MP at 12 fps; 4 MP or 3 MP at 15 fps; 4 M-N, 1080p, 720p, 960H, D1, CIF, or QCIF at 30 fps
Sub Stream: 960H at 15 fps; D1 or CIF at 30 fps
Maximum Incoming Bandwidth 128 Mb/s
Bit Rate 32 to 6144 Kb/s per Channel
Recording Modes Manual, Schedule (Regular, Continuous), MD (Video Detection: Motion Detection, Video Loss, Tampering), Alarm, and Stop
Recording Intervals 1 to 60 Minutes (Default 60 Minutes)
Pre-Record: 1 to 30 Seconds
Post-Record: 10 to 300 Seconds
Audio Compression AAC (First Channel Only), G.711A, G.711U, and PCM
Audio Sample Rate 8 kHz, 16 Bits per Channel
Audio Bit Rate 64 Kb/s per Channel


Interface 2 x HDMI (3840 × 2160)
1 x VGA (1920 × 1080)
1 x BNC, TV
Spot Output HDMI 2
Output Resolutions HDMI 1: 3840 × 2160, 2560 × 1440, 1920 × 1080, 1280 × 1024, 1280 × 720

HDMI 2 / VGA: 1920 × 1080, 1280 × 1024, and 1280 × 720

Maximum Decoding 8 Channels of 8 MP at 7 fps
8 Channels of 6 MP at 10 fps
8 Channels of 5 MP at 12 fps
16 Channels of 4 MP or 3 MP at 7 fps
16 Channels of 4 M-N or 1080p at 15 fps
16 Channels of 720p or 960H at 30 fps
Multi-Screen Display IP Extension Mode Disabled: 1/4/8/9/16
IP Extension Mode Enabled: 1/4/8/9/16/25/36
On-Screen Display Camera Title, Time, Video Loss, Camera Lock, Motion Detection, and Recording
Fish eye Dewar ping Via Web Interface or Smart PSS


Interface 1 x RJ45 Port, 1000 Mb/s
Network Function HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, P2P, IP Search (Supports Dahua IP Cameras, DVRs, and NVRs)
Max. User Access. 128 Users
Compatible Operating Systems iOS and Android
Interoperability ONVIF 16.12, CGI Conformant

Video Detection & Alarm

Trigger Events Recording, PTZ, Tour, Video Push, Email, FTP, Snapshot, Buzzer, and Screen Tips
Video Detection Motion Detection, Video Loss, Tampering, and Diagnosis MD Zones: 396 (22 × 18)
Alarm Input 16 Channels
Relay Output 6 Channels

Playback & Backup

Playback 1/4/9/16
Search Modes Time/Date, Alarm, Motion Detection, and Exact Search
Accurate to 1 Second
Playback Functions Play, Pause, Stop, Rewind, Fast Play, Slow Play, Next File, Previous File, Next Camera, Previous Camera, Full Screen, Repeat, Shuffle, Backup Selection, and Digital Zoom
Backup Modes USB Device and Network


Internal HDD 4 x SATA Ports, up to 10 TB Capacity for Each Disk 8 TB Preinstalled
eSATA 1 x eSATA Port

Auxiliary Interface

USB 1 x USB 2.0 port
2 x USB 3.0 port
Serial 1 x RS-232 Port for PC Communication and Keyboard
1 x RS-485 Port for PTZ Control
1 x RS-422 Port for PTZ Control


Power Supply 100 to 240 VAC, 50/60 Hz
Power Consumption <35 W, without HDDs


Operating Conditions 14 °F (-10 °C) to 131 °F (55 °C) 10 to 90% RH
Storage Conditions -4 °F (-15.56 °C)  to 158 °F (70 °C)  0 to 90% RH


Installation Desktop or Rack mount
Rack Height 1.5 RU
Dimensions 17.32 × 16.42 × 2.99” / 44.0 × 41.7 × 7.6 cm
Weight 10.58 lb (ca. 5 kg)


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