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Audio Authority 1177A-1 Digital Audio Switch

Automatic Electronic Switcher for Coaxial and Optical TOSLink Digital Audio Sources

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The Audio Authority 1177A-1

Audio Authority 1177A-1 Digital Audio Switch / AutoSelector

Introducing the new Audio Authority 1177A-1 digital audio switch!

The 1177A-1 is the successor to the 1177A and is manufactured by Audio Authority for Cable Solutions, exclusively.

Specs for the 1177A-1 are equal or superior to those of the 1177A, so you can expect outstanding performance.  Appearance is essentially identical except for the dash-one in the model number and a subtlety more luxurious finish on the case.

The Audio Authority 1177A-1 Digital Audio Switch brings an all-metal cabinet for optimal shielding and appearance and the new design features new circuit board architecture for superior performance.

This high-performance digital audio switch can expand the digital audio capacity of any audio system. It automatically selects the active audio input and it can convert optical and coaxial signals automatically and transparently so you can connect any combination of optical TOSLink or coaxial digital audio sources.

The 1177A-1 digital audio switcher outputs both optical and coaxial signals simultaneously, converting seamlessly between the two formats. For example, you can have a satellite receiver connected to input one via TOSLink optical cable and a DVD player connected to input two via coaxial cable. No matter which input is active, the switcher will always output both optical and coaxial formats from that source. The 1177A-1 is a digital switcher capable of passing SPDIF signals in any format or clock rate, so it supports all Dolby Digital, DTS, and PCM formats.

The 1177A-1 comes with a universal power supply, so it will work just about anywhere in the world, although customers outside of the USA will almost certainly need a passive adapter for the plug.

Like most Audio Authority products, the 1177A-1 Digital Audio Switch comes with a one year limited warranty from the manufacturer.

Audio Authority's Description

4:1 Digital Audio AutoSelector

Model 1177A-1

This 4x1 AutoSelect switch is a perfect solution when digital audio sources outnumber your system's digital audio inputs. The 1177A-1 features both digital coaxial and digital optical inputs and outputs, and automatically outputs the selected audio source in both formats simultaneously.

Four inputs, one output. Made in the USA.


The 1177A-1 is a unique four input, one output digital audio switcher, incorporating technologies such as AutoSelect automatic input switching and digital audio automatic cross-conversion. This sturdy product is perfect for adding digital audio inputs to a Bose Lifestyle system, or a legacy A/V receiver that has very few digital inputs. Supports both digital optical and digital coaxial audio types.

  • AutoSelect automatic input switching selects active source
  • Four inputs (digital coax and digital optical), one output (digital coax and digital optical)
  • All-metal construction
  • Supports all Dolby Digital, DTS, and PCM formats
  • Made in the USA


Key Features

  • Four inputs (digital coax and digital optical)
  • One digital coax output
  • One digital optical output
  • Automatic digital audio cross-conversion
  • AutoSelect¬™ technology with manual selection override
  • Made in the USA


  • Digital audio (coaxial and optical) - 4/1


Video Parameters

  • N/A

Audio Parameters

  • Input Impedance: 75 ohms
  • Min Load Impedance: 75 ohms
  • Multi-channel Digital: Yes
  • Frequency Response: 10-50KHz
    [the 1177A-1 is a digital switcher capable of passing SPDIF signals in any format or clock rate.]


  • Connector Types: RCA (digital coaxial audio), Toslink (digital optical)
  • Dimensions (HxWxD, inches):2.25 x 5.6 x 4.7
  • Shipping Weight: 1.9 lbs.
  • DC Input Connector: 5.5 x 2.1mm
  • DC Input Voltage/Polarity: 12V/Center Positive or Negative
  • Max DC Input Current: 150mA
  • Heat Output: N/A

In the Box

  • Power Supply: Model 571-013
  • User Manual



Audio Authority1177A-1

The front panel has multi-color LEDs to indicate "auto" mode and input selection status, as well as a push-button switch for manual source selection.

Audio Authority1177A-1 Front Panel

This shot shows the front panel in greater detail.

Audio Authority 1177A-1 cabinet finish

In this back-lit shot, we have attempted to capture with the camera the subtle qualities of the finish.  It's a nice textured finish with a subdued metallic appearance.  It is easy enough to appreciate in person, but difficult to capture in a photo.

Audio Authority 1177A-1 back panel

This picture shows the back panel. If you zoom in, you can see four optical TOSLink digital audio inputs at the upper right, with a corresponding coaxial digital input below each optical input. The output connectors are on the left side. The power input connector is located between the input and the output connectors.

Audio Authority 1177A-1 - included items

Shown here are the items that are included in the box. Starting at the upper right, moving in a clockwise direction, you can see the the 1177A-1 unit itself, a universal power supply, and an installation instruction sheet.

Audio Authority 1177A-1 universal power supply

Here is a closer look at the included universal power supply. As you can see, this will work with just about any power system. The plug itself is intended for the USA, so if you are in a different country, you will need a passive adapter.

Audio Authority 1177A-1 package

Shown here is the product box.

Audio Authority 1177A-1 Product Focus Sheet

Here is the product focus sheet.  Click to download PDF.

Audio Authority 1177A-1 User Manual

Here is the user manual, in PDF format.

Purchase Information
Product Description SKU MSRP Your Price Quantity
Audio Authority 4x1 Digital Audio AutoSelector Switch 1177A-1 $199.99 $164.00
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