FiiO K9PRO ESS Desktop Headphone Amplifier/DAC

🧾 Overview / Summary
The FiiO K9 Pro ESS is a flagship all‑in‑one desktop amplifier and DAC designed for audiophiles who demand top‑tier sound and maximum versatility. Combining dual ESS9038Pro DACs, THX AAA™ amplifier technology, and extensive input/output options — including Bluetooth 5.0 — it delivers clean, powerful, and detailed audio from any source. Controlled via app or front panel, it’s as easy to use as it is impressive to hear.

✅ Key Features
✅ Dual ESS9038Pro DACs for ultimate resolution & transparency
✅ THX AAA™ balanced amplifier with up to 2 W of power
✅ Bluetooth 5.0 with SBC, AAC, aptX, aptX LL, aptX HD, LDAC
✅ Wide input/output support: USB, coaxial, optical, RCA, XLR
✅ Balanced & unbalanced headphone and line outputs
✅ Analog & digital circuits completely separated
✅ Controlled via app (iOS & Android) or front panel
✅ 3‑stage gain control, volume control with illuminated knob
✅ Supports PCM 32‑bit/384 kHz, DSD256, and MQA playback

📊 Technical Specifications
Parameter Value
DAC chips Dual ESS9038Pro
Amplifier THX AAA™ Achromatic Audio Amplifier
Bluetooth 5.0 (SBC, AAC, aptX, aptX LL, aptX HD, LDAC)
PCM Up to 32‑bit / 384 kHz
DSD Native DSD256
MQA Supported
Output power Up to 2 W (balanced, low‑impedance headphones)
Gain settings 3‑stage (low, medium, high)
Inputs USB, optical, coaxial, RCA, 4.4 mm
Outputs 6.35 mm, 4.4 mm balanced, RCA, 3‑pin XLR, 4‑pin XLR
Dimensions 200 × 224 × 72 mm (approx.)
Weight ~3 kg

📦 What’s in the Box
📦 FiiO K9 Pro ESS amplifier/DAC
🔌 AC power cable
🔗 USB cable
📖 Quick start guide

🔄 Compatibility
✔ Works with Windows, macOS, iOS, Android via USB or Bluetooth
✔ Compatible with virtually all headphones (balanced & unbalanced)
✔ Supports line‑out and pre‑amp mode for external amplifiers or powered speakers
✔ Fully controllable via FiiO Control App (iOS & Android)

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

📝 Reviews
⭐ “A perfect desktop companion — powerful, detailed, and feature‑packed.” — Head‑Fi
⭐ “THX AAA amplification and ESS DACs deliver audiophile‑grade performance at home.” — MajorHiFi
⭐ “Everything you need in a desktop DAC/amp, nothing you don’t.” — Google Review