Fully linear low-noise PSU with 75W toroidal transformer, switchable 12/15V and 0.1V adjustment. Ideal for FiiO K13 R2R, DACs, streamers. Read more.
The FiiO Darkside Pro is a fully linear, low-noise power supply designed to give sensitive hi-fi components a steadier foundation. Many DACs, streamers, preamps and headphone amps ship with compact switching adapters that are efficient, but can introduce high-frequency noise and a less stable electrical environment. The Darkside Pro focuses on the part of the chain that’s easy to overlook: power quality. For demanding listeners who want a calmer presentation without changing their entire setup, a serious external linear PSU can be a practical, measurable upgrade path.
At its core sits a 75-watt toroidal transformer, chosen for stable behavior and low magnetic leakage in real-world systems. FiiO pairs that with a discrete regulation stage based on parallel N-MOSFETs, aiming to respond quickly to changing current demands—especially relevant for digital audio devices. Daily usability is built in: you can switch between 12 V and 15 V, fine-tune the output in 0.1 V steps, and monitor the active setting via clear LED indicators. Internal protection circuits add confidence when powering valuable equipment.
Matched with the FiiO K13 R2R, the Darkside Pro makes particular sense because R2R designs can be sensitive to supply noise and small voltage variations. Rather than “adding a new sound,” a cleaner supply can help the system feel more controlled: quieter backgrounds, smoother transitions and more coherent timing are common goals in this category. With a robust GX16-2 aviation connector and a solid metal chassis, it’s built like a proper piece of hi-fi hardware, not a lightweight accessory. If you’re ready to firm up the electrical base of your system, the Darkside Pro is a smart place to start.
