Matrix Audio SU-1 USB Isolation Switcher

Matrix Audio SU-1 USB Isolation Switcher

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

A dedicated professional-grade digital isolation chip electrically separates each signal path and isolates grounds, physically breaking the 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 — removing ground-loop noise and high-frequency interference, and guarding against surges and lightning damage. The result is lower system noise, a 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. A short press cycles through the USB Type-C1, Type-B1, and Type-B2 inputs; a long press switches between the USB Type-A1 and Type-A2 outputs. The status LEDs light up to show the current input and output chain 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 up to 4 meters, with combined input and output cable length up to 8 meters, so signals stay stable over long runs without data attenuation or packet loss. Sources and DACs no longer 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, the SU-1 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 Features

• Galvanic Isolation: Input and output ports are fully galvanically isolated, blocking noise from front-end devices, cutting off ground loops, and ensuring pure signal transmission.
• USB Port Routing: Switch any one of the 3 USB inputs to any one of the 2 USB outputs — connect 3 front-end devices and 2 back-end devices at once with no cable swapping.
• USB Signal Repeater: Optimized output transmission impedance reduces signal loss and improves anti-interference, supporting longer USB cable runs with a stable, reliable link.
• USB Power Linkage: Input and output USB power are synchronized — the output turns on when the input detects a source and off when it loses power, without affecting front-end sleep.
• Output Overcurrent Protection: Each USB output delivers 5V/1000mA ultra-low-noise power; if current exceeds 1000mA the output shuts down and the LED flashes red, restored after the fault is cleared.

Specifications

Frequently Asked Questions

Q: What does the Matrix Audio SU-1 do?
A: The SU-1 is a USB isolation switcher that routes any one of three USB inputs (two Type-B, one Type-C) to either of two USB Type-A outputs, with full galvanic isolation and a built-in linear power supply to lower noise and protect connected DACs.

Q: How many devices can I connect?
A: Up to three front-end sources (computers, streamers, transports, mobile devices) and two back-end DACs or digital audio interfaces at the same time, with one-button switching between them.

Q: Does the SU-1 remove ground-loop noise?
A: Yes. A professional-grade digital isolation chip breaks the electrical connection between data, power, and ground lines, eliminating ground-loop noise and high-frequency interference while preserving signal integrity.

Q: How does it switch inputs and outputs?
A: A short press of the single front-panel button cycles through the USB-C and two USB-B inputs; a long press toggles between the two USB-A outputs. Status LEDs show the active input/output chain.

Q: How long a USB cable can I use?
A: Optimized transmission impedance supports up to 4 meters on a single side and up to 8 meters combined (input plus output) without data loss, so sources and DACs can be placed far apart.

Q: Does it supply power to connected devices?
A: Yes. Each USB-A output provides 5V/1000mA of ultra-low-noise power with automatic overcurrent and short-circuit protection. Input and output power are synchronized — when the input detects a source, the output turns on automatically.

Q: Where can I buy the Matrix Audio SU-1?
A: The Matrix Audio SU-1 is available at Vinyl Sound, with shipping across the USA.

Available at Vinyl Sound. Ships across the USA.