FiiO K9: a desktop DAC and headphone amplifier built on dual ES9068AS chips and THX AAA 788+ amplification, decoding DSD512 over USB and receiving LDAC over Bluetooth. It suits desk listeners who want one box: computer or streamer in, headphones out, and a wireless input for when a cable isn't convenient.
Who the FiiO K9 is for
One-box desk setups: Decoding and amplification share one chassis, so a computer or streamer feeds it directly and headphones plug straight in.
Headphone enthusiasts: There's enough amplification headroom that most enthusiasts stop worrying about whether their headphones are being driven properly.
Listeners happy with their headphones' tuning: THX AAA amplification aims for a clean, low-distortion presentation rather than a colored one, so the headphones' own voicing comes through.
Wired and wireless listening: DSD512 over USB covers the desk computer, while the LDAC Bluetooth input handles cable-free listening.
Skip it if: you want the amplifier itself to add warmth or color; the THX AAA design aims for a clean, low-distortion presentation.
FiiO K9 key specs
DAC chips: Dual ES9068AS
Amplification: THX AAA 788+
DSD support: DSD512 over USB
Bluetooth input: LDAC
Form factor: Desktop DAC and headphone amplifier
Color: Black
Genuine stock, 1-year warranty. Free shipping on every order, 45-day returns.
FiiO K9 vs similar options
vs SMSL DO400: Pairs an ES9039MSPRO DAC with an XMOS XU316 interface in a fully balanced design and supports MQA-CD; pick the K9 for dual ES9068AS chips with THX AAA 788+ amplification.
vs FiiO K13 R2R: Built on a 24-bit R2R resistor-ladder DAC with NOS/OS modes instead of dual ES9068AS chips; choose it for R2R conversion, or the K9 if you need DSD512 (the K13 R2R stops at DSD256).
vs FiiO K9 Skylight: The Skylight edition of the K9, listing the same dual ES9068AS, THX AAA 788+, LDAC and DSD512 core; it costs more, so the standard K9 makes sense unless you want that edition.
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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