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Compact silver metal box with one VGA input and four RJ-45 output ports

Black Box Corporation

Black Box Corporation AC555A-4-R2 4-Port VGA Repeater 1024 x 768

SKU CH-QFMF-JFQMC MPN AC555A-4-R2

Distributes one VGA source to four displays over 500 ft Category 6 cable at 1024 x 768 resolution

  • Extender & repeater typeVideo Extender
  • Supported resolutions1024 × 768
  • Extends VGA signals up to 500 ft over Cat6 cable
  • Four RJ-45 ports drive multiple displays from one source
  • Supports 1024 x 768 XGA resolution
  • Compact 0.60" high transmitter fits tight spaces
  • WEEE and RoHS certified for environmental compliance

Four-Port VGA Repeater for Multi-Display Runs

The Black Box AC555A-4-R2 distributes a single VGA source to four remote displays over Category 6 twisted-pair cable. It supports XGA graphics modes at 1024 x 768 resolution and reaches 500 ft per output. The unit is built for control rooms, digital signage and classroom installations where one computer must drive several monitors.

XGA Resolution Across Four Outputs

Each of the four RJ-45 ports carries a 1024 x 768 signal without scaling, so every connected display receives the same native XGA image. The extender handles standard business graphics and presentation content comfortably. It runs out of headroom above XGA; higher resolutions or widescreen formats are not supported by this model.

Fanless Operation With Low Power Draw

The transmitter measures .60 in high, 3.30 in wide and 2.30 in deep, weighing 6.40 oz. With no moving parts it runs silently in rack or desktop mounts. Power consumption stays low enough for standard AC adapters, and the metal chassis dissipates heat passively during continuous operation.

How it compares

Measured against everything we stock in A/V Extenders & USB Hubs, at today’s prices. Recalculated every night.

Price $192.99
Pricier than about 65% of the 239 comparable items (median $132.99).

Specifications

Product
Brand nameBlack Box
Display
Supported resolutions1024 × 768
Size & build
Shipping weight0.81 kg
Package size229 × 102 × 102 mm
More details
Extender & repeater typeVideo Extender

Questions about this item

Will this unit drive my existing XGA monitors at 1024 x 768 over 500 ft of Category 6 cable?

Yes, the repeater supports XGA graphics modes up to 1024 x 768 resolution over a maximum operating distance of 500 ft using Category 6 twisted pair cabling.

How can I confirm the repeater is transmitting a clean signal to all four outputs after installation?

Verify that each connected display shows a stable 1024 x 768 image without flicker or artifacts, indicating the VGA signal is being distributed correctly across all four RJ-45 ports.

Does the package include the Category 6 cables needed for the four RJ-45 ports, or must they be purchased separately?

The unit provides one VGA input, one VGA output, and four RJ-45 ports; twisted pair Category 6 cables for the network connections are not included and must be sourced separately.

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