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Audio Authority 1398C 4K Ultra HD
Distribution Amplifier

1:8 HDMI Distribution Amp/Splitter with 3D Support

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Audio Authority 1398A 4K/2K Ultra HD 1:8 HDMI Distribution Amp/Splitter with 3D Support

Audio Authority 1398A 4K/2K Ultra HD 1:8 HDMI Distribution Amp/Splitter with 3D Support

The Audio Authority 1398C 1x8 HDMI distribution amplifier  supports 4K/2K Ultra HD video as well as 3D, 36 bit color depth /12 bits per color, lossless audio formats, and many of the latest features.

1398C distributes identical 4K Ultra High Definition video signals from one source to eight UHD displays. It is the ideal solution for merchandising HD displays using the latest content a the highest resolutions, and even 3D.  It supports standard 4K2K formats and refresh rates, showing the maximum capabilities of 4K flat screen displays and projectors.

It is essential that a distribution amplifier allows an HD source to function with multiple displays of different brands.  Display-source compatibility is ensured by the 1398C’s multiple EDID options. In TV mode the 1398C uses the EDID on one of its eight outputs, and asks the source to send matching HDMI signals to the other seven HDMI outputs.  In default mode the 1398C uses its built-in EDID as an alternative in case there is a problem getting the source to send a video format compatible with all displays.

It’s easy to install the 1398C using its integral mounting flanges and locking power supply connection ensures dependable service. With output jacks on both sides, sharp cable bends are kept to a minimum.  Daisy-chain multiple 1398Cs or create a hub-and-spoke layout for large distribution systems.

Like most Audio Authority products, the 1398C comes with a one year limited warranty from the manufacturer.

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Audio Authority's Description

1:8 4K HDMI Distribution Amp/Splitter

1398C Brings Ultra HD to Every Display

  • 1 HDMI input, 8 outputs
  • UHD resolutions up to 4K@30 Hz
  • Supports standard and HD resolutions
  • Supports lossless audio formats
  • Supports 3D signal transmission
  • Multiple EDID settings and EDID learning
  • Mounting tabs for easy installation


Model 1398C distributes Ultra High Definition resolutions up to 4K from one source to eight HDMI displays. Multiple EDID settings ensure compatibility between source and displays. This feature is especially useful in the retail demo environment, where multiple brand and model TVs all receive the same source signals. The 1398C passes 3D signals. Bitstream audio is also supported - including LPCM 7.1 channel uncompressed audio, Dolby Digital TrueHD (7.1), and DTS HD: Master Audio (7.1). Legacy codecs such as Dolby Digital and DTS core are also supported.

  • Supports 4K Ultra High Definition resolutions at 30 Hz
  • 36 bit Deep Color (sum of all channels)
  • Dolby TrueHD and Dolby Digital Plus (bitstream throughput)
  • DTS HD and DTS HD: Master Audio (bitstream throughput)
  • Mounting tabs for easy installation
  • Compact footprint with outputs on two sides to reduce sharp cable bends



Key Features

  • Supports default EDID settings or can learn EDID from displays
  • Outputs may be cascaded to create an extensive distribution network up to seven layers deep
  • Supports 3D content
  • Supports up to 36 bit color depth /12 bits per color (TMDS channel)
  • Supports resolutions up to 4K@30Hz, 1080p@24/60Hz including 480i, 480p, 720p, 1080i, 1080p and multiple PC resolutions
  • Supports Dolby Digital Plus, Dolby® Digital TrueHD and DTS-HD: Master Audio
  • HDMI compliant, HDCP 1.1 compliant, DVI 1.0 compliant

Video/Audio Inputs/Outputs:

  • HDMI: 1/8

What makes the 1398C Unique?

  • Ultra HD signal distribution delivers uncompressed 4K signals to eight UHD displays.
  • EDID* Modes: Select from several EDID modes including automatic display EDID discovery, default EDID, and manual settings.


Video Parameters

  • Video Formats: 480i/p, 576i/p, 720p, 1080i/p, 4K
  • Color Processing: 36 bit Deep Color (12 bits per TMDS color channel)

Audio Parameters

Audio Processing

  • Lossless and uncompressed audio formats, including Dolby TrueHD and DTS-HD: Master Audio, LPCM 7.1 channel
  • Bandwidth: 20Hz to 20KHz
  • Multi-channel Digital: Yes


  • Shipping Weight: TBD
  • Product Weight: TBD
  • Data Rate: 2.25Gbps (single link)
  • DC Input Connector: locking type, 5VDC

In the Box

  • Power supply 5V / 6A locking, USA
  • User manual - 12 pages, printed



  • Focus Sheet (.PDF) Model 1398C Product Focus Sheet
  • Manual (.PDF) Model 1398C Installation Manual
4K Ultra HD HDMI Logos


Audio Authority 1398C front-right view

Front-right view of the Ultra-HD distribution amp

Audio Authority 1398C, EDID control

Here is a close-up view of the EDID control.  The USB update port can also be seen here.

Audio Authority 1398C, back

1398C back

Audio Authority 1398C, bottom

1398C bottom

Audio Authority 1398C, included items

Audio Authority's 4K HDMI Distribution Amplifier package includes (from left to right) power cord, power supply, mounting screws, user manual, and the 1398 device itself.

Audio Authority 1398C, product box

Here is the product box.

Audio Authority 1398C Focus Sheet - PDF format

1398C Focus Sheet - PDF

Audio Authority 1398C Manual - PDF format

1398C User Manual - PDF

Purchase Information
Product Description SKU MSRP Your Price Quantity
1:8 4K Ultra HD Distribution Amplifier 1398C $399.00 $359.00
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Why Cable Solutions?

American Innovation and American workmanship are intrinsic in the Audio Authority name.  Add customer-centric service from Cable Solutions and you get a superior experience.  Don't get stuck with incorrect advice, bad service, slow shipping or inferior products. If you want the best, you need look no further.