General
Number of inputs	4 DVI-D
Number of outputs	2 DVI-D
Audio inputs	4 3.5 mm stereo sockets
Audio outputs	2 3.5 mm stereo sockets
Control	Front keys, RS-232, wireless remote control
Auto-scan function	Yes with adjustable intervals
Scan intervals	8, 15, 30, 45 Seconds
Maximum DVI cable length	5 m
Supported resolution	1600 x 1200 at 60 Hz
Operation temperature	5 to 40 °C
Current supply	100–240 VAC
Frequency range	50–60 Hz
Height	1 HE

The BlackBox AC1125A is a 4x2 DVI Matrix Switch with integrated audio transmission, designed for professional signal distribution in applications such as digital signage, presentations, or exhibitions. The device enables the distribution of four different DVI and audio signals to two DVI monitors and associated speakers. Control is possible via multiple channels: via buttons on the front panel, via a connected PC through the RS-232 port, or via an included wireless remote control that covers up to 5 m distance. The functions include direct switching of video and audio signals, as well as individual enabling and disabling of signals for each output. Each of the two outputs delivers both a video signal and an audio signal, ensuring synchronized playback.

Applications

The switch is particularly suitable for applications where multiple signal sources need to be switched and displayed simultaneously on two displays. Typical use cases include digital signage systems, where content from various sources (e.g. PCs, media players) is presented on different screens. It is also ideal for exhibitions or conference rooms where flexible signal control is required, offering a reliable solution.

Functions and Equipment in Detail

A central feature is the Auto-Scan function, which enables automatic cycling through the inputs. The scan intervals are selectable and include 8, 15, 30, or 45 seconds. System settings are automatically saved and restored after a power failure, eliminating the need for reconfiguration. Operation is possible via front panel buttons, via a PC through RS-232, or via the wireless remote control. The remote control allows operation from up to 5 m distance, facilitating control in larger rooms.

Technology Explained Simply

The switch processes DVI-D signals, enabling digital video transmission. The maximum supported resolution is 1600 x 1200 at 60 Hz, which is sufficient for use in professional display and presentation systems. The maximum cable length for DVI connections is 5 m, enabling installation in typical rooms. Audio transmission occurs via 3.5 mm stereo jacks, with four inputs and two outputs available. Power supply is via an external power adapter with 100–240 VAC, 50–60 Hz, with automatic voltage detection (autosensing). The operating temperature ranges from 5 to 40 °C, allowing use in standard indoor environments.

Compatibility and Accessories

The switch is designed for use with DVI-D connections. The connections are clearly structured: four DVI-D inputs and two DVI-D outputs, each supplemented by 3.5 mm stereo jacks for audio. Mounting is in a 1HE rack, with a mounting kit available. Dimensions are 4.1 cm height, 22 cm width, and 9.7 cm depth. The device weighs 0.7 kg.

Mounting and Installation

Installation is in a standard 19-inch rack. The 1HE height enables space-saving mounting. Wiring is done via DVI-D cables and 3.5 mm audio cables. The remote control is included in the delivery scope.

Advantages in Operation

Automatic saving of settings and restoration after power failures reduces maintenance effort. The multiple control options via front panel buttons, PC, and remote control offer flexibility. The Auto-Scan function enables automated content presentation, with scan intervals individually adjustable. The combination of video and audio transmission in a single device simplifies system architecture and reduces the number of required components.