DARKSIDE PRO
Low-Noise Regulated Linear Power Supply

The FiiO DARKSIDE PRO is an ultra-low noise regulated linear power supply designed to optimize performance of DACs, headphone amplifiers, streamers, and other high-fidelity audio devices.
Part of the FiiO Power Purification series, it is designed to ensure stable, clean, and interference-free power delivery, for an ultra-silent, pitch-black background that lets the true essence of your music shine through.
An ideal pairing with FiiO K13, K15, K17, K19, and more.
Purchases from Bay Bloor Radio include a 1-Year Warranty from FiiO Canada, with local repair/replacement without the need for international shipping.

Specifically designed for low-noise audio, this toroidal transformer utilizes a grain-oriented silicon steel circular core process for higher efficiency and minimized eddy currents. The seamless, fold-free coil design ensures a uniform magnetic field and minimal magnetic leakage. With a 75W reserve, it effortlessly handles high-dynamic transient demands, delivering solid bass extension and a vividly clear soundstage.
Audiophile-grade components inside
- Japanese Shindengen D15XB60 Bridge Rectifier: Low heat generation and high stability-minimizes micro-interference caused by current fluctuations for a cleaner audio signal.
- 5 ELNA capacitors + 7 Rubycon filter capacitors + 2 WIMA film capacitors: Effectively filters power supply noise to reveal a crystal-clear sonic foundation.
- Monocrystalline Silver-Plated Copper DC Cable: Reduces transmission loss and shields against electromagnetic interference (EMI) to enhance audio details.
Fully Discrete NMOS Voltage Regulator Circuit
Dual high-current IRFZ34NPBF MOSFETs are used in a parallel configuration to lower internal resistance. The result is improved dynamic range and ensures that every nuance of the audio is faithfully preserved. With fully discrete voltage regulator circuit and high-precision reference, ultra-low noise and lightning-fast transient response are achieved all while effectively minimizing heat generation.
Relay-Switched 12V/15V Output, Precision Thermal Control
An integrated relay manages the transformer's output voltage to provide a precise match for both 12V and 15V settings. Such a design maximizes power efficiency and significantly reduces heat generation during operation.
Minimalist Aluminum Chassis
The power supply features a heavy-duty unibody aluminum construction that sports the same minimalist design language found on the FIIO K13 series. Its significant weight and premium feel are matched by its function: the metal housing eliminates resonance and blocks electromagnetic interference, while the cooling grilles ensure stable, low-temperature operation. It stacks seamlessly with other FIIO desktop gear, blending an orderly, unified look with uncompromised power.
What’s included
- FiiO DARKSIDE PRO
- DC Power Cord
- AC Power Cord
- Spare Fuse
- Quick Start Guide
- 1-Year Warranty, administered by FiiO Canada and Bay Bloor Radio (no international shipping required)

Specifications

