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AJA Io 4K Plus Professional Video I/O for Thunderbolt 3

BH #AJIO4KPLUS • MFR #IO-4K-PLUS
AJA Io 4K Plus Professional Video I/O for Thunderbolt 3
Key Features
  • DCI 4K & UHD I/O via 12G-SDI & HDMI 2.0
  • 4K/UHD to 2K/HD Down Conversion
  • Dual Thunderbolt 3 Ports
  • Downstream Keyer
The AJA Io 4K Plus Professional Video I/O for Thunderbolt 3 is a portable capture and output device that offers professional video and audio connectivity with support for DCI 4K and UltraHD workflows. It handles a wide range of formats from 4K to SD over both SDI and HDMI. Built around Thunderbolt 3 technology, the Io 4K Plus allows even greater bandwidth between host computer systems and Thunderbolt devices. The dual Thunderbolt 3 ports allow you to daisy chain up to 6 peripherals such as high-resolution displays and high-capacity storage. A built-in downstream keyer takes advantage of 4K resolution to provide clean composites.
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AJA Io 4K Plus Overview

The AJA Io 4K Plus Professional Video I/O for Thunderbolt 3 is a portable capture and output device that offers professional video and audio connectivity with support for DCI 4K and UltraHD workflows. It handles a wide range of formats from 4K to SD over both SDI and HDMI. Built around Thunderbolt 3 technology, the Io 4K Plus allows even greater bandwidth between host computer systems and Thunderbolt devices. The dual Thunderbolt 3 ports allow you to daisy chain up to 6 peripherals such as high-resolution displays and high-capacity storage. A built-in downstream keyer takes advantage of 4K resolution to provide clean composites.

Featuring four 3G-SDI inputs and outputs, as well an HDMI 2.0 input and output, the Io 4K Plus is capable of capturing and outputting 4K signals over quad link SDI or HDMI. It is also capable of handling UltraHD, 2K, HD, and SD resolutions, and supports HDR. When working with 4K content, the Io 4K Plus outputs an HD-SDI down-converted signal on a dedicated BNC connector. This HD signal can be used to output to HD recorders or monitors. Embedded 16-channel SDI and 8-channel HDMI audio are supported, as well as analog audio inputs/outputs via a standard DB-25 connection. Stereo monitoring is possible via a front-panel headphone jack. A 4-pin XLR power input is available for powering the Io 4K Plus with batteries or the included AC adapter.

Additional Features

  • Two Thunderbolt 3 ports
  • Four bidirectional SDI inputs/outputs
  • SDI I/O supports either one 12G-SDI stream, or up to four 3G-SDI streams with up to 16-channels of embedded audio
  • One 3G-SDI monitor output with 8 channels of embedded audio, supports 2K/HD down conversion
  • One HDMI 2.0 input with 8 channels of embedded audio
  • One HDMI 2.0 output with 8 channels of embedded audio, supports 4K, HDR or HD
  • 10-bit 4:2:2 and 4:4:4 workflow support
  • Supports HDR
  • Built-in downstream keyer
  • Backwards compatible with existing Thunderbolt hosts
  • Simultaneous SDI and HDMI outputs
  • Multi-channel audio I/O via DB-25 connector
  • RS-422 VTR control
  • Reference and LTC input/output
  • Stereo audio monitoring with gain control
  • XLR 12V power for battery or AC power supply
  • Integrates with software such as Apple Final Cut Pro X, Adobe Creative Cloud, AJA Control Room, Telestream Wirecast 5, and more
UPC: 892448000809

AJA Io 4K Plus Specs

Video Formats4K:
4096 x 2160p: 60/59.94/50/48/47.95/30/29.97/25/24/23.98
3840 x 2160p: 60/59.94/50/48/47.95/30/29.97/25/24/23.98

2K:
2048 x 1080p: 60/59.94/50/48/47.95/30/29.97/25/24/23.98
2048 x 1080PsF: 30/29.97/25/24/23.98

HD:
1080p: 60/59.94/50/48/47.95/30/29.97/25/24/23.98
1080PsF: 30/29.97/25/24/23.98
1080i: 60/59.94/50
720p: 60/59.94/50

SD:
525i: 29.97
625i: 25

Please Note: High Frame Rate Capabilities Are Dependent on Host System Attributes. Not All Systems and Configurations Will Support All Frame Rates
Video Inputs12G-SDI:SMPTE-2082, 8-/10-/12-Bit
6G-SDI: SMPTE-2081, 8-/10-Bit
3G-SDI: SMPTE-259/292/296/424/425, 8-/10-/12-Bit
4K/UltraHD: 4 x BNC (4:4:4)
1.5G-SDI: SMPTE 372M, Dual-Link HD 4:4:4 (2 x BNC), 8-/10-/12-Bit
1.5G-SDI: SMPTE 292M, Single-Link 4:2:2 (1 x BNC), 8-/10-Bit
HDMI v2.0
30/36 Bits/Pixel, RGB or YUV, 6 Gb/s per Color Component
4K, UltraHD, 2K, HD and SD with HFR Support up to 60p (4:2:2), 8-/10-Bit

Please Note: 6G/12G-SDI Configured Ports Support UltraHD/4K Only. 12-Bit Support Is Application Dependent
Video Output12G-SDI:SMPTE-2082, 8-/10-/12-Bit
3G-SDI: SMPTE-259/292/296/424/425, 8-/10-/12-Bit
4K/UltraHD: 4 x BNC (4:4:4)
1.5G-SDI: SMPTE 372M, Dual-Link HD 4:4:4 (2 x BNC), 8-/10-/12-Bit
1.5G-SDI: SMPTE 292M, Single-Link 4:2:2 (1 x BNC), 8-/10-Bit
HDMI v2.0
30/36 Bits/Pixel, RGB or YUV, 6 Gb/s per Color Component
4K, UltraHD, 2K, HD and SD with HFR Support up to 60p (4:2:2), 8-/10-Bit

Please Note: 6G/12G-SDI Configured Ports Support UltraHD/4K Only. 12-Bit Support Is Application Dependent
Audio InputDigital
16-Channel, 24-Bit SDI Embedded Audio, 48 kHz Sample Rate, Synchronous
8-Channel, 24-Bit HDMI Embedded Audio, 48 kHz Sample Rate, Synchronous

Analog
DB-25 Connector: 4-Channel, 24- and 16-Bit D/A Analog Audio, 48 kHz Sample Rate
+24 dBu Full Scale Digital (0dBFS) ±0.2 dB 20 to 20 kHz Frequency Response Input Is Supported Across Ch. 1-4
Audio OutputDigital
16-Channel, 24-Bit SDI Embedded Audio, 48 kHz Sample Rate, Synchronous
8-Channel, 24-Bit HDMI Embedded Audio, 48 kHz Sample Rate, Synchronous

Analog:
DB-25 Connector: 4-Channel, 24- and 16-Bit D/A Analog Audio, 48 kHz Sample Rate
+24 dBu Full Scale Digital (0 dBFS) ±0.2 dB 20 to 20 kHz Frequency Response Input Is Supported Across Ch. 5-8
Reference and LTC I/OReference
Analog Color Black (1 V) or Composite Sync (2 or 4 V) or HD Tri-Level Sync (1 V)
Reference Input Is Terminated into 75 Ohms When Genlock Is Set to Ref In

LTC I/O
1 x BNC LTC Output
1 x BNC Assignable to Reference Video or LTC Input
Machine Control1 x RS-422, Sony 9-Pin Protocol
Interface2 x Thunderbolt 3
Power1 x 4-Pin XLR
10 to 20 VDC
30 W Typical
36 W Max
70 W Max with USB-Type C Power Delivery to External Devices
EnvironmentalOperating Temperature: 32 to 104°F / 0 to 40°C
Storage Temperature: -40 to 140°F / -40 to 60°C
Operating Humidity: 10 to 90% non-condensing
Operating Altitude: <10,000' / 3000 m
Dimensions8.74 x 8.11 x 1.65" / 22.20 x 20.60 x 4.19 cm
Weight3.4 lb / 1.5 kg
Packaging Info
Package Weight5.905 lb
Box Dimensions (LxWxH)9.95 x 9.55 x 4"

AJA Io 4K Plus Reviews

This thing is AMAZING!

By Tim
Rated 5 out of 5
Date: 2021-09-09

Works Perfectly. I use it to bring in 4 video feeds to a laptop. Sound a video is fantastic.

Not compatible...

By Jason
Rated 2 out of 5
Date: 2020-09-21

A fabulous idea: Four SDI inputs, Four SDI outputs, audio breakout capable...All over one thunderbolt 3 cable. But alas, there are no free lunches in life. This device is not compatible in the ways one might think. Wirecast? Not unless its version 14 and above. Live Stream Studio? NOPE. What a beautiful invention for a simple live-streaming setup. If only it was compatible...

Works well with Vmix

By Robert
Rated 5 out of 5
Date: 2019-07-11

Works with a Laptop approved by Vmix and we've had no issues with it. The only I'd change is it won't output 1080 59.94P, only 1080 29.97 P. Hopefully this will be changed soon.

Does wat it promise

By Juan
Rated 5 out of 5
Date: 2018-10-28

Haven't fully used the system but till now has behaved as expected. Powerful and professional equipment.

Industry must-have!

By Sylvester
Rated 5 out of 5
Date: 2021-05-25

Excellent product! Have been using Thunderbolt version for years. Now with USB-C the speed is way better and I love the auto-power-off function, which turns off the fans and puts the unit to complete sleep (no need for separate power strip to control ON/OFF). Also feels cooler, even though still a hot brick, esp. in 4K mode. Although I use it 100% for editing, this is also a must-have product for any stable and high-end studio production as well as post. Thanks B&H, thanks AJA!

dependable

By Ken
Rated 5 out of 5
Date: 2020-11-17

used with Mac Pro, and avid etc. great interface. Way better than blackmagic.

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question

Can you use this device to connect 4 prosumer camcorders via SDI and send the signal to OBS or Wirecast to act like Blackmagic Duo Link 2 for Livestream to a laptop
Asked by: Anonymous
This product is compatible with Wirecast. It does have 4 SDI inputs which Wirecast will see a sources for a streaming program.
Answered by: Joseph
Date published: 2021-09-13

Does this unit extract clipname from sdi on red ...

Does this unit extract clipname from sdi on red cameras?
Asked by: Russell
Unfortunately it is not just a question of whether or not the AJA Io 4K Plus Professional Video I/O for Thunderbolt 3 (B&amp;H# AJIO4KPLUS) will extract clip name data, but rather whether such data would be passed through by the driver and also recognized by the NLE. While some data (such as the HDR flag) is specifically preserved and more broadly supported (because it's associated directly with HDMI protocols), less common RED clip name data may not be captured by some drivers, software, and other devices. Moreover, revisions in camera firmware, video capture drivers, and NLEs can also occur in ways that can change such compatibility in the future. As such, it's not possible for us to say definitively whether or not it will work in your usage case. The only way to determine that is to try it.
Answered by: Yoni
Date published: 2021-12-03

Just to clear, when I open vMix I can see all 4 ...

Just to clear, when I open vMix I can see all 4 SDI inputs of this Aja as 4 SEPARATE INPUTS. In other words, does software read the TB3 as a 4 lane I/O (I plug in 4 SDI sources and I can select to add those 4 sources independently in vMix)?
Asked by: Mark
Yes, there are four inputs in vmix. Each can be used ad input or output. Have done this many times. You can use two units fir total of eight.
Answered by: Jan
Date published: 2021-12-08

Hello! Does this device help with processing of ...

Hello! Does this device help with processing of capture, or does it rely on your computers gpu?
Asked by: Ian
This device does process the video signal.
Answered by: Joseph
Date published: 2021-03-05

question

Want to future proof. Is this backwards compatible to use with my Thunderbolt 2 mac, till I upgrade?
Asked by: Rick
Yes, with the adaptor
Answered by: Kyle
Date published: 2019-01-31

Would vmix or OBS see five independent video ...

Would vmix or OBS see five independent video inputs from this (four SDI and one HDMI) as well as two independent video outputs (SDI and HDMI)? Or are the SDI and HDMI outputs just loop outputs of their respective inputs?
Asked by: Devon
This device has 1 HDMI Input and 1 HDMI Output. However this only has 4 SDI connections that are Bi-Directional. They can be used as 4 Inputs, 4 Outputs or 2 Inputs and 2 Outputs. It
Answered by: Joseph
Date published: 2021-03-05

For mirrorless video camera with 4K 60FPS ...

For mirrorless video camera with 4K 60FPS high-bit raw output over HDMI, would this device facilitate: Camera Io HDMI 2 in Io Thunderbolt out Thunderbolt 3 SSD direct record?
Asked by: Dan
NO it can NOT.
Answered by: Sean
Date published: 2021-04-14

Is this compatible with wirecast ?

Is this compatible with wirecast ?
Asked by: Senoga
Yes, this is compatible with Wirecast according to AJA.
Answered by: Joseph
Date published: 2021-08-10
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