Atlona 3x1 Video switcher w/ Audio Mixer & Amplifier w/HDBT Input - AT-OME-CS31-SA-HDBT

Product Overview

The Atlona AT-OME-CS31-SA-HDBT is an all-in-one AV presentation and collaboration system combining a 3x1 video switcher, 50-watt mixer amplifier, and USB hub in a single low-profile enclosure for classrooms and conference rooms. The unit accepts two HDMI inputs and one HDBaseT input—capable of extending HDMI, Ethernet, USB, power, and control up to 330 feet over a single category cable—and outputs to a connected projector or display via HDMI. Its onboard digital signal processing supports mixing of three line inputs, de-embedded HDMI audio, and USB audio, with Acoustic Echo Cancellation for remote collaboration scenarios. Education-specific features including audio ducking for instructor microphones and PA sense muting make the AT-OME-CS31-SA-HDBT well-suited for K-12 and higher education AV installations requiring integrated audio amplification.

Product Description

The AT-OME-CS31-SA-HDBT addresses the full AV signal chain for a single-display room in a compact package that can be mounted behind a display, under a desk, or in a small equipment enclosure. The switcher accepts sources from two local HDMI ports for devices at the equipment location and one HDBaseT input for a remote transmitter—such as a wall plate or floor box transmitter—located at a presenter’s position. The HDBaseT input passes HDMI video, Ethernet, USB 2.0 data, power, and control signals over a single CAT5e or better cable run up to 330 feet, keeping installation wiring simple in retrofit and new construction environments. The integrated 50-watt amplifier delivers either 2x25 watts in stereo or a single bridged channel of 50 watts into 4 or 8 ohm speaker loads, providing sufficient output for a standard classroom or medium-sized conference room without a separate amplifier. Three line-level inputs—one balanced stereo (for microphones or professional sources at +4 dBu) and two unbalanced stereo on 3.5 mm connectors—feed the onboard DSP mixer along with de-embedded HDMI audio and USB audio from a connected conferencing device. Acoustic Echo Cancellation on the USB audio path automatically removes echo for participants joining remotely, which is critical for hybrid meeting applications. The ducking feature detects audio presence on the balanced input (typically an instructor or presenter microphone) and automatically reduces the level of all other program audio sources, ensuring spoken content is clearly heard over background media. PA sense input monitors a 25V, 75V, or 100V public address system line and mutes the amplifier output when a PA announcement is active. A four-port USB 2.0/3.0 hub switches between a remote USB host (via HDBaseT) and a local USB 3.0 type-B host, enabling cameras, speakerphones, and interactive displays to follow the selected source automatically. Automatic display control via CEC, IP, or RS-232 powers the connected display on when a source is detected and powers it off when the room is vacant, reducing energy consumption and wear. The unit is Energy Star qualified and NDAA Section 889 compliant, relevant for government and education procurement. Two RS-232 ports, two digital I/O ports, dual Ethernet ports, and support for Atlona Velocity and third-party control systems provide complete integration flexibility for managed AV environments.

Key Features

• 3x1 AV Switching with HDBaseT Input — Switches between one HDBaseT and two HDMI inputs to a single HDMI output, with HDBaseT extending signals up to 330 ft (100 m) over a single category cable.
• 50-Watt Integrated Mixer Amplifier — Delivers 2x25 W stereo or 1x50 W bridged into 4 or 8 ohms, providing sufficient amplification for classrooms and conference rooms without a separate amplifier chassis.
• USB Hub with Host Switching — Four USB peripheral ports switch between a remote USB 2.0 host (via HDBaseT) and a local USB 3.0 type-B host, supporting cameras, speakerphones, and interactive displays.
• Acoustic Echo Cancellation (AEC) — Onboard DSP eliminates echo on the USB audio path, ensuring clear audio quality for remote participants in hybrid meeting and collaboration scenarios.
• Audio Ducking — Automatically reduces program audio levels when the instructor or presenter microphone on the balanced input is active, ensuring spoken content is intelligible over background media.
• PA Sense Muting — Detects activity on a 25V, 75V, or 100V public address system and mutes the amplifier output, allowing school or facility-wide announcements to be heard without audio interference.
• HDR Support (HDR10, HLG, Dolby Vision) — Passes HDR metadata formats including HDR10, Hybrid-Log Gamma, and Dolby Vision at up to 4K/60 Hz, ensuring compatibility with current display technology.
• HDCP 2.2 Compliance — Supports the current content protection standard, allowing protected 4K content to pass through the system without compatibility errors.
• Automatic Display Control — Controls connected display power state via CEC, IP, or RS-232 based on source detection or occupancy sensor input, reducing manual operation requirements.
• Dual Ethernet Ports with Integrated Switch — Connects the switcher to an AV LAN for IP control without requiring a separate Ethernet switch in the equipment location.
• Energy Star Qualified — Meets energy efficiency standards, supporting sustainability goals in education and commercial facilities.
• NDAA Section 889 Compliant — Meets federal procurement requirements for government and federally-funded education installations.
• Low-Profile Enclosure — Compact form factor (0.98 x 11.81 x 8.27 in) supports mounting behind a display, under a desk, or in a credenza without requiring a full equipment rack.

Typical Applications

• Conference room
• Boardroom
• Huddle room
• Training room
• Multi-purpose room
• Government space
• Commercial meeting space

Technical Specifications

Frequently Asked Questions

Q: What is the maximum HDBaseT cable run distance for 4K signals on the AT-OME-CS31-SA-HDBT?

The AT-OME-CS31-SA-HDBT supports 4K/UHD over HDBaseT up to 295 ft (90 m) using CAT5e and up to 330 ft (100 m) using CAT6, CAT6a, or CAT7 cable. Note that 4K/UHD at 60 Hz over HDBaseT is limited to 4:2:0 chroma subsampling per the HDBaseT specification.

Q: How does the audio ducking feature work in a classroom installation?

Ducking monitors the balanced stereo line input, which is typically connected to an instructor or presenter microphone. When audio is detected on that input, the unit automatically reduces the volume of all other program audio sources—such as a video playing through HDMI—so the spoken content is heard clearly. The ducking threshold and response time are configurable through the built-in web server.

Q: Does the AT-OME-CS31-SA-HDBT work with third-party control systems?

Yes. The unit supports TCP/IP, RS-232, CEC, and digital I/O control interfaces, providing compatibility with Crestron, Extron, AMX, and other commercial control platforms. It also integrates with Atlona’s Velocity control system. Atlona provides API documentation for driver development.

Q: Can the USB hub switch between a local laptop and a remote device over HDBaseT?

Yes. The USB hub supports four peripheral ports (cameras, speakerphones, interactive displays) and switches between a local USB 3.0 type-B host and a remote USB 2.0 host connected via the HDBaseT input. This allows USB peripherals to follow the active AV source automatically or be switched manually.

Q: Is the AT-OME-CS31-SA-HDBT suitable for government or federally-funded education projects?

Yes. The unit is NDAA Section 889 compliant, meeting federal procurement requirements that restrict the use of telecommunications equipment from certain manufacturers in government and federally-funded programs.

Q: What speaker configurations does the amplifier support?

The integrated amplifier delivers 2x25 watts per channel in stereo or dual mono mode into 4 or 8 ohm speakers, or 50 watts into a single 4 or 8 ohm speaker in bridged mono mode. This output level is appropriate for a standard classroom, huddle room, or medium conference room with passive speakers.

Q: What is the warranty on the AT-OME-CS31-SA-HDBT?

The AT-OME-CS31-SA-HDBT carries a 3-year warranty from Atlona. Full warranty terms are available at atlona.com/warranty. For pricing, availability, and installation support, contact Creation Networks at creationnetworks.net.

Q: Can the unit be mounted behind a display rather than in a rack?

Yes. The AT-OME-CS31-SA-HDBT’s low-profile enclosure (0.98 in tall, 11.81 in wide) is designed specifically to allow mounting behind a flat panel display, under a desk, or in a credenza, making it well-suited for installations where a full equipment rack is not available or desirable.