🧾 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
