FiiO DARKSIDE PRO

Low-noise regulated linear power supply

Audiophile-grade 75W toroidal transformer

12V/15V dual voltage support, 3A high current output

Fully discrete voltage regulator circuit + dual-MOSFET parallel current amplification output Relay-controlled transformer voltage switching ELNA/Rubycon/WIMA capacitors

Self-resetting fuse overcurrent protection | Precision potentiometer for voltage fine-tuning Minimalist Tech Family-Style Appearance

* product drawings are for reference only, all in kind shall prevail

Note: The product layout is for reference only. All products shall prevail.

DARKSIDE PRO

FIIO Power Purification series

DARKSIDE | Introducing FiiO’s power purification series of products, meticulously engineered for your HiFi audio system.

DARKSIDE PRO lives up to its name by providing

an ultra-silent, pitch-black background,

letting the true essence of your music shine through.

Audiophile-grade

75W toroidal transformer

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 throughout

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

Aesthetics meets performance

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.

Precision calibration, Intelligent protection

Packing list

①---------------------------------------DARKSIDE PRO *1

②------------------------------------------DC power cord*1

③------------------------------------------AC power cord*1

④---------------------------------------------- Spare fuse*1

⑤-------------------------------------- Quick start guide*1

⑥----------------------------------------- Warranty card*1

Buttons and ports labeled

①Power switch: Turns the device on or off

②Output voltage display panel: Indicates the current output voltage

③DC power output port: Outputs DC voltage via a power cable

④DC output voltage toggle switch: Switches between 15V and 12V output; please ensure the selected voltage matches the operating range of the connected device

⑤Output voltage fine-tuning resistor: If a slight deviation occurs in the displayed voltage value, use a flat-head adjustment tool to insert and turn for correction

⑥Input fuse tube: If damaged, it must be replaced by a qualified professional with the correct specification; please do not attempt the replacement yourself

⑦AC power input port: For devices with dual voltage options(220- 240V~ or 100-120V~), please always confirm that thelocal mains supply voltage matches the input voltage label of this urnitbefore connecting

Basic Parameters