FiiO Darkside Pro Low-Noise Linear Power Supply Silver

The FiiO Darkside Pro is a low-noise regulated linear power supply in a silver finish, built to replace standard switching adapters and deliver cleaner, more stable DC power to DACs, streamers, headphone amplifiers and preamplifiers. It uses a 75 W toroidal transformer with fully discrete NMOS regulation and offers selectable 12 V or 15 V output at up to 3 A.

This listing is the silver finish. The Darkside Pro is also available in black.

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 Darkside Pro delivers a low-noise DC output to improve the performance of sensitive components such as DACs, network streamers, headphone amplifiers and preamplifiers. Reducing interference and power fluctuations contributes to a quieter background, improved detail retrieval and better sonic clarity.

Audiophile Linear Power Design

The Darkside Pro uses a linear power supply architecture to reduce electrical noise compared to conventional switching supplies. Linear designs produce smooth voltage output with minimal high-frequency interference — interference that can otherwise degrade sensitive audio circuits. The result is reduced background noise and improved performance stability for connected components. For users wanting to optimise their system, swapping a standard switching adapter for a dedicated linear supply like the Darkside Pro is a practical step up — particularly for desktop equipment 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, chosen for efficient power delivery and minimal magnetic leakage. It provides strong current reserves and stable voltage, even under demanding conditions. A fully discrete NMOS voltage regulation circuit with parallel MOSFETs reduces internal resistance, improves dynamic response and maintains extremely stable voltage levels. The combination delivers fast transient response and ultra-low noise output.

Flexible Voltage and High Current Capability

Selectable 12 V and 15 V output settings let the Darkside Pro support a wide range of compatible audio devices. A relay-controlled voltage switching system ensures efficient operation and minimises heat. Output current reaches up to 3 A, suitable for most desktop Hi-Fi components. A precision voltage adjustment feature allows fine-tuning within a narrow tolerance range for optimal compatibility with specific equipment.

Robust Construction and Built-In Protection

The Darkside Pro has a metal chassis that reduces electromagnetic interference and provides long-term structural rigidity. Connectivity includes a GX16-2 DC output connector, standard AC input and a rear voltage selection switch. Built-in overcurrent protection and voltage monitoring protect connected equipment, and LED indicators show voltage status at a glance.

A Meaningful Upgrade for Audio Enthusiasts

The Darkside Pro is a practical upgrade for enthusiasts seeking cleaner power for DACs, streamers, headphone amplifiers and preamplifiers. Its combination of audiophile-grade linear design, discrete regulation, robust construction and flexible voltage options makes it a versatile addition to desktop Hi-Fi setups where clean, stable power matters.