FiiO Darkside Pro Black

step over to the darkside...The FiiO DARKSIDE PRO is a high-performance, low-noise regulated linear power supply designed to elevate the performance of modern Hi-Fi systems. As part of FiiO’s Power Purification Series, it focuses on one of the most critical yet often overlooked elements in audio reproduction: clean, stable power delivery. At its core is an audiophile-grade 75W toroidal transformer, engineered to deliver highly efficient power with minimal electromagnetic interference. This design reduces eddy currents and magnetic leakage, ensuring a more consistent current flow that supports improved dynamic range, deeper bass response, and a more open, detailed soundstage.

Unlike conventional switching adapters, the DARKSIDE PRO uses a fully discrete voltage regulation circuit paired with dual high-current MOSFETs in parallel. This architecture lowers internal resistance while maintaining ultra-low noise and rapid transient response, allowing connected components to perform with greater precision and stability—even during demanding musical passages. Flexibility is a key strength, with selectable 12V or 15V output and up to 3A of current, making it compatible with a wide range of audio equipment including DACs, headphone amplifiers, and network streamers. A relay-controlled voltage switching system ensures optimal efficiency while reducing heat, and a precision adjustment control allows fine-tuning of output voltage for exact system matching.

The result is an exceptionally “black” background—free from unwanted noise and interference—allowing greater clarity, improved separation, and a more natural presentation of music. By replacing standard power supplies with a purpose-built linear design, the DARKSIDE PRO helps unlock the full potential of high-resolution audio systems. Housed in a minimalist aluminium chassis, the unit combines robust thermal performance with a clean, understated aesthetic that integrates seamlessly into premium desktop setups. Intelligent protection features, including overcurrent safeguarding and precise calibration, ensure reliable long-term operation.

Designed for discerning listeners, the DARKSIDE PRO is an effective upgrade for those seeking a cleaner, more refined, and dynamically expressive listening experience from their existing audio equipment.

at a glance • 75W Toroidal Transformer – Audiophile-grade toroidal transformer designed for efficient, low-noise power delivery with plenty of current reserve.
• 12V / 15V Output – Relay-switched voltage selection makes the DARKSIDE PRO compatible with a wide range of FiiO desktop audio equipment.
• Fully Discrete Regulation – Dual-MOSFET parallel current amplification and a discrete voltage regulation circuit provide stable, low-noise DC output
• Premium Filtering Components – ELNA, Rubycon and WIMA capacitors are used throughout the filtering and regulation stages.
• Precision Voltage Adjustment – Rear-panel potentiometer allows fine adjustment of the output voltage, while built-in protection provides automatic current limiting.