FiiO Darkside Pro Low-Noise Linear Power Supply Black

The FiiO Darkside Pro is a low-noise regulated linear power supply, available here in black, built to replace standard switching adapters and deliver cleaner, more stable DC power to DACs, streamers, headphone amplifiers and preamplifiers. It is part of FiiO's desktop audio accessories range.

This listing is the black finish. The Darkside Pro is identical inside in both colours; choose the silver version to match silver equipment.

Key specifications

• Type: regulated linear power supply
• Transformer: 75 W toroidal
• Regulation: fully discrete NMOS with parallel MOSFETs
• Output: selectable 12 V or 15 V, up to 3 A, with fine voltage adjustment
• Connectors: GX16-2 DC output, standard AC input, rear voltage selector
• Protection: overcurrent protection and voltage monitoring with LED status indicators
• Metal chassis to reduce electromagnetic interference

The FiiO Darkside Pro is designed to provide clean, stable power for high-performance hi-fi audio systems. Its low-noise DC output improves the performance of sensitive components such as DACs, network streamers, headphone amplifiers and preamplifiers.

Unlike standard switching adapters, the Darkside Pro reduces interference and power fluctuations, contributing to a quieter background, improved detail retrieval and better overall sonic clarity.

Designed for audio enthusiasts who understand the importance of clean power, this unit is a meaningful upgrade for systems where performance and consistency are key priorities.

Audiophile Linear Power Design

At the core of the Darkside Pro is a linear power supply architecture, chosen for its ability to reduce electrical noise compared to conventional switching power supplies. Linear designs are valued by audiophiles for their smooth voltage output and minimal high-frequency interference, which can otherwise affect sensitive audio circuits.

By maintaining a cleaner power delivery path, the Darkside Pro reduces background noise and improves the performance stability of connected components. This can result in improved clarity and more natural sound reproduction. Replacing a standard switching adapter with a dedicated linear supply such as the Darkside Pro can provide a worthwhile performance improvement — particularly when pairing it with a desktop DAC and amplifier such as the FiiO K15 Desktop DAC and Headphone Amplifier.

Powerful Transformer and Discrete Regulation

The Darkside Pro is built around a 75 W toroidal transformer designed for efficient power delivery and minimal magnetic leakage. It provides strong current reserves and stable voltage output even during demanding listening sessions. A fully discrete NMOS voltage regulation circuit featuring parallel MOSFETs complements this design.

This regulation system reduces internal resistance, improves dynamic response and maintains extremely stable voltage levels. The result is fast transient response and ultra-low noise performance, ensuring connected equipment receives clean, consistent power. This reflects FiiO's focus on delivering performance benefits that can be appreciated in high-resolution audio systems.

Flexible Voltage and High Current Capability

The Darkside Pro offers selectable 12 V and 15 V output settings, allowing it to support a wide range of compatible audio devices. A relay-controlled voltage switching system ensures efficient operation while minimising heat generation. The unit delivers up to 3 A of output current, making it suitable for many desktop hi-fi components that require stable, reliable power.

A precision voltage adjustment feature allows users to fine-tune the output within a narrow tolerance range, ensuring optimal compatibility with specific equipment. This flexibility makes the Darkside Pro a versatile upgrade solution for enthusiasts looking to improve the performance of multiple devices within their audio system.

Robust Construction and Built-In Protection

The Darkside Pro features a metal chassis that reduces electromagnetic interference and provides long-term structural strength. The substantial build quality reflects the internal transformer design and linear power architecture. Connectivity includes a GX16-2 DC output connector, standard AC input and a rear voltage selection switch for convenient configuration.

Built-in safety features include overcurrent protection and voltage monitoring to ensure reliable operation and protect connected equipment. LED indicators provide clear voltage status information at a glance, ensuring the Darkside Pro delivers dependable operation in demanding listening environments.

A Meaningful Upgrade for Audio Enthusiasts

The FiiO Darkside Pro is a performance upgrade for audio enthusiasts seeking cleaner power for their systems. By replacing standard switching power supplies with a dedicated linear solution, it reduces noise, improves stability and allows connected equipment to perform more consistently.

Its compatibility with DACs, streamers, headphone amplifiers and preamplifiers makes it a flexible addition to many desktop hi-fi setups. With audiophile design, robust construction and flexible voltage options, the Darkside Pro offers a practical and effective way to enhance the electrical foundation of a high-quality audio system. Clean power is an essential step forward for those looking to maximise performance.