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Atlona AT-UHD-CLSO-824-B 4K/UHD 8x2 Presentation Matrix Switcher

The Atlona AT-UHD-CLSO-824 is an 8×2, 4K/UHD @ 60Hz matrix switcher with multi-format signal-handling, Ethernet-enabled 100-meter HDBaseT™ input/output extension, and advanced audio capabilities.
In stock (50 items available)
  • Brand
  • SKU
  • Weight
    10.00 lbs
  • Warranty
    3 Years
  • Condition
  • Status
Product availability status

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  • Shipping info
    We offer free ground shipping on every purchase of $300 and more for US.
  • Payment Methods

  • Return Policy
    We Offer a 60-Day Money Back Guarantee
  • Weight
    10 lbs
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Please NOTE: This listing is for B-Stock item. It means that this unit was refurbished by manufacturer and holds full manufacturer warranty, however it may have scratches, signs of wear and tear or come not in original box.

The Atlona AT-UHD-CLSO-824 is an 8×2, 4K/UHD @ 60Hz matrix switcher with multi-format signal-handling, Ethernet-enabled 100-meter HDBaseT™ input/output extension, and advanced audio capabilities.


  • Three Ethernet-enabled HDBaseT™ inputs
  • Four HDMI inputs
  • One multi-function analog video input


  • Two Ethernet-enabled HDBaseT outputs, each with a mirrored HDMI output

Presentation Matrix Switcher

The AT-UHD-CLSO-824 brings advanced multi-format matrix switching to the CLSO series of classroom and small office switchers. The mix of inputs supports remote sources at lecterns and conference room tables via HDBaseT transmission as well as local sources in the equipment rack. The matrix serves a wide array of room configurations with two HDBaseT video outputs, each featuring a mirrored HDMI port to provide an additional output for a local display or an Atlona Extender Kit.

100-meter HDBaseT Routing

The AT-UHD-CLSO-824 offers three Ethernet-enabled HDBaseT inputs designed to provide system design flexibility. To increase the number of system inputs, designers can choose the HDVS-200 Series of HDBaseT transmitters that offers HDMI and VGA inputs with Ethernet or the HDVS-150 Series that offers HDMI and VGA inputs without Ethernet. The switcher is also compatible with the UHD-EX Series of HDBaseT extenders for HDMI signals with or without control signals. Two HDBaseT outputs on the switcher provide extended distance AV signal extension up to 328 feet (100 m). These outputs are Ethernet-enabled to also provide extension of control signals to displays. All HDBaseT inputs and outputs feature industry standard Power over Ethernet to remotely power extender endpoints.


Sophisticated matrixing capabilities within the switcher include a dedicated audio mix-matrix for signals routed to the switcher’s outputs. This gives integrators the ability to mix audio signals from either of the two selected video sources along with both mic/line input signals. Audio is de-embedded from the video signal for processing and mixing with the mic/line sources. The resulting audio mix is sent to the balanced line level analog outputs and re-embedded to the digital video outputs.

The CLSO for complex systems

The AT-UHD-CLSO-824 serves as the centerpiece of complex systems where audio and video signals must be dedicated to different zones. It also provides the flexibility to route identical or separate video signals to the two displays in larger rooms.

The AT-UHD-CLSO-824 is ideal for use in:

  • Dual-screen classrooms, conference rooms, or training environments
  • Divisible rooms with one screen per room
  • Single-screen teleconference systems where content is required at the codec
HDBaseT Input Compatibility HDBaseT Output Compatibility
AT-HDVS-200-TX: HDMI and VGA input, Ethernet-enabled, volume control, 328 ft. (100 m) AT-UHD-EX-100CE-RX: HDMI output, Ethernet-enabled, RS-232, 328 ft. (100 m)
AT-HDVS-150-TX or AT-HDVS-150-TX-WP: HDMI and VGA input, 230 ft. (70 m) AT-HDVS-200-RX: HDMI output, Ethernet-enabled, scaling, 328 ft. (100 m)
  AT-HDVS-RX: HDMI output, scaling, 230 ft. (70 m)


8×2 matrix switcher with HDBaseT and HDMI ports for each output

  • Eight different sources may be switched to either of two outputs with mirrored HDBaseT/HDMI signals
  • Serves a wide array of room configurations

Three HDBaseT inputs

  • Works with Atlona AT-HDVS-150 or AT-HDVS-200 transmitters for placement at remote sources near lecterns, conference tables, and instructor’s desks
  • Simplifies integration of remote sources by eliminating power supplies when used with PoE-powered transmitters; single category cable carries AV signals, control and power

Four HDMI inputs

  • Digital inputs to support up to four HDMI sources or DisplayPort and DVI sources with appropriate adapters
  • Ideal for sources located at the equipment rack

One multi-function analog input on 15-pin HD connector

  • Accepts RGBHV and component signals using common adaptors and break out cables
  • Provides input options for legacy analog sources

Two Ethernet enabled, HDBaseT outputs

  • Extends control signals from third party control processors via HDBaseT along with 4K/UHD video, and audio through a single with cable 328 ft. (100 m) performance
  • Network connections simplify control system design; eliminates multiple cable runs between source, control system router and display

Audio output matrix mixer

  • Mixes de-embedded digital audio along with analog mic/line level inputs and routes to analog outputs or re-embed to video outputs
  • Eliminates the need for complex external audio routing systems

Two, balanced, stereo audio outputs on 6-pin captive screw connectors

  • Maintains proper audio gain structure between commercial line level devices; eliminates adaptors
  • Designed for use with analog commercial sound systems

Mirrored outputs on HDBaseT and HDMI

  • Each matrix output supports dual display applications for a local display and extended distance displays up to 328 feet (100 meters)
  • Eliminates cost associated with extra extension components; simplifies installation. HDMI output allows additional HDBaseT transmitter for dual, long distance applications

4K/UHD @ 60 Hz capability

  • Compatible with Ultra High Definition sources and displays  up to 4K @ 60 Hz with 4:2:0 color subsampling
  • Supports high resolution applications such as CAD, desktop publishing, and detailed financial reporting

Power over Ethernet for remote-powered HDBaseT receivers

  • Industry standard IEEE 802.3af PoE supplied by the switcher over HDBaseT
  • No local AC outlet required saves time and integration costs

TCP/IP, RS-232, and IR, control

  • Compatibility with third-party control systems provides flexible control options
  • Reduces integration time and costs

EDID management

  • Manages EDID communications between source and switcher; allows integrators to force sources to preferred resolution
  • Ensures desired audio formats and video resolutions are provided to the AV system; eliminates the need for EDID management device

HDCP Management

  • Allows non-protected material from PCs to pass to non-compliant displays and teleconference systems while protected content is not transmitted
  • HDCP compliance can be switched on/off from control systems for use with non-compliant displays, streaming devices, and codecs

Two, balanced line/mic input with 48V phantom power

  • Provides professional audio input for wired and wireless microphones
  • Saves installation costs by eliminating external audio mixer

Microphone ducking with advanced controls

  • Automatically reduces program audio levels when mic is used
  • Ensures optimized voice-over performance

Audio de-embedding

  • De-embeds PCM audio from HDMI inputs to audio out matrix
  • Provides audio signal routing to sound system

Adjustable Volume and EQ

  • Features independent gain control for each input, master audio level controls 5 band EQ adjustment
  • Optimizes audio signals eliminating the need for an external mixer

Front panel volume and mute controls

  • Volume Up and Volume Down through menu to adjust output level to sound system
  • Provides quick level adjustment for operators

Easy, GUI-based configuration using integrated web server

  • Offers menu-based configuration of network settings, RS-232 settings, input switching, EDID and HDCP management and audio
  • Allows fast configuration of internal product settings and troubleshooting from a tablet, smart phone or PC in the field

IP to RS-232 translation

  • Converts TCP/IP commands to RS-232 commands for output to external devices
  • Enables single IP connection to control processor to control both IP and RS-232 connected devices. Faster installation

Ten RS-232 ports

  • Multiple, bidirectional, RS-232 ports to control other devices in the system
  • Reduces cost associated with complex control processors

Ethernet, RS-232 and IR HDBaseT insertion

  • Adds control signals to the HDBaseT transmission including Ethernet, RS-232 and bi-directional IR
  • Simplifies display control from third-party control systems

Multi-channel audio compliant

  • Supports PCM, Dolby® Digital, Dolby Digital Plus™, Dolby TrueHD, Dolby Atmos®, DTS Digital Surround™, and DTS-HD Master Audio™ in pass through mode
  • Allows any two-channel audio stream to be used within a professional audio system

Rack mountable 1U, full-rack width enclosure

  • Installs easily in rack mounted systems with included 19” rack and wall mount brackets
  • Reduces installation time and cost
Video 4096×2160@24/25/30/50*/60Hz*, 3840×2160@24/25/30/50*/60Hz*, 2048x1080p, 
1080p@23.98/24/25/29.97/30/50/59.94/60Hz, 1080i@50/59.94/60Hz, 720p@50/59.94/60Hz, 576p, 576i, 480p, 480i
VESA 2560×2048, 2560×1600, 2048×1536, 1920×1200, 1680×1050, 1600×1200, 1600×900, 1440×900, 1400×1050, 1366×768, 1360×768, 1280×1024, 1280×800 1280×768, 1152×768, 1024×768, 800×600, 640×480
Colorspace YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color depth 8-bit, 10-bit, 12-bit
Analog Output PCM 2Ch (de-embedded)
HDMI IN/OUT PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby Digital, DTS 5.1, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio
Sample Rate 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bit Rate up to 24-bit
CAT5e/6 @ 4K up to 70 meters up to 230 feet
CAT5e/6 @ 1080p up to 100 meters up to 328 feet
CAT6a/7 @ 4K up to 100 meters up to 328 feet
HDMI IN/OUT @ 4K up to 5 meters up to 15 feet
HDMI IN/OUT @ 1080p up to 10 meters up to 30 feet
Bandwidth 10.2 Gbps
CEC Pass through
HDCP Switchable – Compliant/Non compliant
Operating 0°C to 50°C 32°F to 122°F
Storage -20°C to 60°C -4°F to 140°F
Humidity 20 to 90% non-condensing
Consumption 78.54W
Idle Consumption 3.52W
Supply Input: AC100~240 VAC 50/60Hz
Output: 48 VDC 3.125A
H x W x D 44 x 433.8 x 255 (mm) 1.73 x 17.08 x 10.04 (inch)
w/feet 55.15 x 433.8 x 255 (mm) 2.17 x 17.08 x 10.04 (inch)
Rack Unit 1U
Unit 3.49kg 7.69lbs
Power Supply CE, FCC, cULus, CCC, RCM
Unit CE, FCC

*4096×2160@50/60Hz & 3840×2160@50/60Hz supported @ chroma subsampling 4:2:0 8-bit only

Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.

UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations.UPS Ground does not deliver on Saturdays, Sundays or Holidays.

USPS Priority Mail/USPS Express Mail For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.

Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. BZB Express has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.

International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.

Most items ordered from BZB Express will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.


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Money orders: and personal checks or company checks (may take up to 10 days to clear).
Wire Transfer: ( Bank Transfer ) only for the amount over $500. Contact us for the bank details.
Phone Orders: To place a phone order please call 1.888.660.2962 or 1.916.246.6263 and one of our Customer Service Representatives will take your order (8:00am - 6.00pm PST).

Purchase order: Fax purchase orders to 1.916.246.6258

We Offer A 60-Day Money Back Guarantee: 
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 60 days of the purchase date for a full refund. Our 60-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.

Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.

If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.

No Returns/Exchanges on the following:

TVs and monitors 20" and larger
Special Order merchandise
Any item indicated on the website as non-returnable

For more information see our official Return Policy