The FiiO Darkside Pro is a low-noise linear power supply with adjustable output voltage, made to replace the switching wall adapter that shipped with a DAC or amp. It is aimed at listeners chasing hiss or hum they can't trace, especially through efficient IEMs, and at racks where one supply must serve different devices.
Who the FiiO Darkside Pro is for
DACs and amps on a stock wall wart: It takes over from the switching adapter that came in the box, a likely source of noise in your system.
Efficient IEM listeners: It is most useful when efficient IEMs expose a noticeable noise floor, or on gear with sensitive analog stages.
Hunting down hiss or hum: When hiss or hum won't go away and you can't find the cause, the wall adapter is the first suspect worth ruling out.
Systems that keep changing: Adjustable output voltage lets one unit serve different devices as your rack changes, instead of being locked to a single component.
Skip it if: your chain is already silent through efficient IEMs; this supply is pitched at gear with sensitive analog stages or a noticeable noise floor.
FiiO Darkside Pro key specs
Type: Linear power supply for audio components
Output voltage: Adjustable
Noise: Low-noise design
Replaces: The switching wall adapter supplied with a DAC or amp
Colors: Silver, Black
Genuine FiiO stock, 1-year warranty.
FiiO Darkside Pro vs similar options
vs FiiO JadeAudio PL50: Another FiiO linear supply, with 12V and 15V high-current outputs aimed at USB DACs; pick the Darkside Pro if you want adjustable output voltage that can serve different devices as your rack changes.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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