Matrix Audio SU-1 Isolated USB Switcher with Linear PSU

Matrix Audio SU-1 is a professional USB isolation and noise-reduction device built for Hi-Fi USB audio-video devices. Adopting USB-isolation technology to connect host and slave devices in series, it breaks the electrical continuity between transmitting and receiving ends. It features three core functions: full electrical isolation for USB input and output ports; multi-format /0 ports supporting shared use by multiple devices; multi-channel regulated linear power supply.

It effectively improves the system's background signal-to-noise ratio, breaks ground loops to eliminate loop noise, reduces transmission errors, and reveals more audio details. It also protects equipment against damage caused by lightning strikes and power surges.

Tailored for high-quality audio-video applications, the unit undergoes rigorous professional design and pursues excellence in its power-supply system, component selection, and shell craftsmanship.

• Comprehensive USB Type-A / B / C interface coverage
• 3-input, 2-output switching for multi-device shared operation
• Optimized USB transmission impedance to minimize signal loss, improve signal quality, and reinforce connection stability
• Extended USB transmission distance; combined total length of input and output cables up to 8 meters
• Linear power supply with fully-potted toroidal transformer
• Ultra-low-noise 5V / 1A power output
• Front-panel status indicator for direct visual monitoring of operating status
• Full-aluminum-alloy CNC-machined housing
• Dimensions: W120mm × D205mm x H44 mm, Weight: 1.58 kg

Pure Sound 3-in-1

SU-1 is a multi-source USB interface manager built for Hi-Fi and professional audio systems. It combines three core functions: multi-source switching, electrical isolation, and linear regulated power at the output stage. With one-touch source switching, SU-1 cuts noise paths through independent isolation circuitry, delivering a quieter listening background while balancing everyday convenience with USB signal quality.

Multi-Source Seamless Switching

Two USB Type-B inputs and one USB Type-C input let you connect multiple USB sources at once. Two USB Type-A outputs can feed two DACs or digital audio interfaces. Keep everything connected; no more plugging and unplugging when you switch devices.

Isolated, Protected

A dedicated professional-grade digital isolation chip electrically separates each signal path and isolates grounds. It physically breaks the electrical connection between data, power, and ground lines at both ends. While preserving signal integrity, it provides full interface electrical isolation between sending and receiving ends. This removes ground loop noise and high-frequency interference, and guards against surges and lightning damage, protecting valuable audio gear. It provides lower system noise, quieter and more open sound, and the full potential of your audio system.

Precise Power, Stable Sound

A fully encapsulated toroidal transformer linear power supply, paired with multiple ultra-low-noise regulators, gives USB devices a stable, clean power foundation and reduces power noise during playback. It also provides a 5V/1000mA ultra-low-noise output with built-in real-time load detection that automatically detects overcurrent and short-circuit faults and cuts output fast, reliable protection for downstream audio gear.

One Touch, Full View

The front panel uses simple single-button control with input and output status LEDs for intuitive operation. Short press to cycle through USB Type-C1, Type-B1 and Type-B2 inputs. Long press to switch between USB Type-A1 and Type-A2 outputs. The status LED lights up, showing the current input and output chain clearly at a glance.

Long Runs, Free Placement

USB transmission impedance is deeply optimized to reduce signal loss and support long-distance USB runs. A single-side cable can reach 4 meters, with both input and output cable lengths up to 8 meters. Signals stay stable over long runs without data attenuation and packet loss. Sources and DACs don't need to sit next to each other, leaving more room for desktop or living room layouts and more flexible cable planning.

Expand Sound, Hear Beyond

As a signal hub for switching multiple USB audio devices, it connects directly to USB-equipped digital audio transports, computers, mobile devices, and DACs. Flexible device pairings open up more ways to listen, giving multi-device Hi-Fi systems practical connectivity and pure sound.

Key Benefits

• Galvanic Isolation: Uses dedicated digital isolation chips to physically break the electrical connection between source devices (computers, phones, or network bridges) and your DAC. This eliminates ground loops, blocks high-frequency computer noise, and protects against grid surges.

• Clean Linear Power Generation: Replaces noisy standard USB bus power with an internal, fully potted toroidal transformer linear power supply and ultra-low-noise regulators. It provides a steady 5V / 1000mA output to downstream gear.

• Multi-Source & Multi-DAC Switching: Features 3 selectable inputs (2x USB-B, 1x USB-C) and 2 isolated outputs (USB-A), letting you connect up to three digital sources and route them to two separate USB DACs or audio interfaces. A single front-button press handles the switching.

• Impedance & Cable Optimization: Supports up to 8 meters of total cable length (4 meters on the input side and 4 meters on the output side), allowing you to space out components like a remote streamer and a desk setup without signal loss.

• Safety & Protection: Includes built-in real-time load detection that automatically cuts power output during overcurrent or short-circuit events to safeguard your connected audio gear.

• EMI-Shielded Build: Housed in a precision CNC-machined unibody aluminum chassis that dampens external RF/EMI interference and manages heat dissipation.