FiiO K9 AKM Headphone Amplifier/DAC

🧾 Overview / Summary
The FiiO K9 AKM is a high‑end desktop DAC and headphone amplifier that combines cutting‑edge AK4191EQ + AK4499EX DACs, THX AAA 788+ amplifier technology, and a fully balanced architecture. With versatile inputs, powerful outputs, and app‑controlled customization, it delivers exceptional clarity, power, and versatility — ideal for both casual and critical listening.

✅ Key Features
✅ Dual AK4191EQ + AK4499EX DACs for pristine audio quality
✅ THX AAA 788+ amplifier: up to 2 W at 32 Ω, 780 mW at 300 Ω
✅ Fully balanced circuit, 6‑stage audio path with partitioned design
✅ High‑res Bluetooth 5.1 with LDAC/aptX Adaptive support
✅ USB‑C port and UAC1.0/UAC2.0 compatibility (PS5 ready)
✅ PEQ and presets controllable via FiiO Control App
✅ Dual linear power supplies: separate analog & digital sections
✅ Horizontal & vertical placement with RGB lighting and 120‑step volume

📊 Technical Specifications
Parameter Value
DAC AK4191EQ + AK4499EX
Decoding chip XMOS XUF208
Amplifier Dual THX AAA 788+
Bluetooth chip Qualcomm QCC5124 (BT 5.1)
Supported BT formats LDAC, aptX Adaptive/HD/LL, AAC, SBC
Inputs USB, Optical, Coaxial, RCA, 4.4 mm
Outputs 6.35 mm, 4.4 mm, XLR‑4, RCA, XLR
Output power (32 Ω) ≥ 2000 mW + 2000 mW (balanced)
Output power (300 Ω) ≥ 780 mW + 780 mW (balanced)
SNR ≥ 124 dB (A‑weighted, UAC)
Noise floor PO: < 4.8 μV / BAL: < 9.3 μV
Output impedance < 1 Ω (32 Ω load)
Dimensions 200 × 224.5 × 72 mm (w/o feet)
Weight ~ 2.66 kg

📦 What’s in the Box
📦 FiiO K9 AKM DAC/AMP
🔌 Power cable
🎧 Headphone plug adapter
🪪 USB data cable
📐 Vertical stand + 6 feet
📝 Quick start guide & voltage selection card
🛡️ Fuse

🔄 Compatibility
✔ Works with PCs, Macs, PS5, smartphones, tablets
✔ Bluetooth audio: phones, tablets, PCs, consoles
✔ Compatible with powered speakers, external amps via RCA/XLR
✔ UAC1.0 & UAC2.0 modes for legacy and modern devices
✔ Control settings via FiiO Control App

📦✈️ Shipping & Returns
📦 Insured worldwide delivery
🔄 14‑day return policy
🛡️ 2‑year manufacturer warranty

📝 Reviews
⭐ 4.8/5 — “Exceptional soundstage and power, perfect for any headphones!” — Audiophile Journal
⭐ 4.7/5 — “Feature‑packed and very musical.” — Verified customer

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