FiiO DARKSIDE PRO BLACK – Low-Noise Regulated Linear Power Supply, 75W Toroidal Transformer, 12V/15V Dual Output, 3A

FiiO DARKSIDE PRO – Audiophile-Grade Linear Power Supply for Ultra-Silent HiFi Audio The FiiO DARKSIDE PRO is a premium low-noise regulated linear power supply engineered specifically for audiophile-grade HiFi audio systems. As part of FiiO's Power Purification series, the DARKSIDE PRO linear power supply delivers an ultra-silent, pitch-black noise floor, allowing the true character of your music to emerge with unmatched clarity and detail. Whether you power a high-end DAC, amplifier, or streaming player, the DARKSIDE PRO transforms your desktop audio chain into a cleaner, more dynamic listening experience. At the heart of the DARKSIDE PRO sits an audiophile-grade 75W toroidal transformer crafted using a grain-oriented silicon steel circular core process. This design minimizes eddy currents, reduces magnetic leakage, and provides a seamless, fold-free coil structure for a perfectly uniform magnetic field. The 75W power reserve effortlessly handles high-dynamic transient demands, delivering solid bass extension and a vividly clear soundstage — qualities that switch-mode power supplies simply cannot match. The DARKSIDE PRO linear power supply features a fully discrete NMOS voltage regulator circuit built around dual high-current IRFZ34NPBF MOSFETs in a parallel configuration. This topology lowers internal resistance, improves dynamic range, and ensures lightning-fast transient response — all while minimizing heat generation. Output noise is kept to an extraordinary Vrms ≤17μV (A-Weighted) at 12V and Vrms ≤30μV (A-Weighted) at 15V, making the DARKSIDE PRO one of the quietest linear power supplies available for audiophile desktop systems. Audiophile-grade components are used throughout the DARKSIDE PRO. A Japanese Shindengen D15XB60 bridge rectifier minimizes micro-interference from current fluctuations. The capacitor array combines 5 ELNA capacitors, 7 Rubycon filter capacitors, and 2 WIMA film capacitors to effectively eliminate power supply noise. Internal wiring uses monocrystalline silver-plated copper DC cable that reduces transmission loss and shields against electromagnetic interference (EMI) for enhanced audio detail and resolution. Switching between 12V and 15V output is managed by an integrated relay that precisely matches the transformer's secondary voltage to the selected setting — maximizing power efficiency and reducing heat during operation. A precision potentiometer allows for granular voltage fine-tuning to perfectly match the requirements of your connected device. A self-resetting fuse provides intelligent overcurrent protection for worry-free, long-term listening. The DARKSIDE PRO is housed in a heavy-duty unibody aluminum chassis sharing the same minimalist design language as the FiiO K13 series. The metal enclosure eliminates resonance and blocks electromagnetic interference, while integrated cooling grilles ensure stable, low-temperature operation during extended use. The front panel features an LED voltage display showing the current output at all times. Compatible with a wide range of FiiO devices including the K11, K11 R2R, K13 R2R, K15, K19, R9, R7, TT13, K5 Pro, K7 series, Q7, and all FiiO portable players using Type-C power supply (adapter sold separately). The FiiO DARKSIDE PRO linear power supply is the definitive upgrade for any audiophile seeking a cleaner, quieter power foundation for their HiFi audio system.