FiiO has introduced its latest flagship USB DAC/Amp system, meet the all-new FiiO K9 Pro ESS. 

True High-Res Audio Decoding With TOTL AKM DAC Chip
FiiO has trusted a flagship audio decoding chip from AKM Technologies to be the heart and core of the K9 Pro. It is equipped with AKM's top-of-the-line AK4499 DAC chip that provides excellent High-Res signal decoding. It helps the K9 Pro to achieve ultra-low THD+N and high SNR ratings ensuring quality performance for the users. Experience your favorite music with ultimate clarity and rich tonality thanks to the AK4499 32-Bit DAC chip in the K9 Pro.

THX AAA, A Trusted AMP Circuitry Partner For FiiO
FiiO has partnered with THX AAA to feature their premium THX AAA 788+ amplification circuit in the K9 Pro. THX is a well-established brand that designs high-quality amplifier circuits to feature in high-end audio gears. The THX AAA 788+ provides crisp audio signal amplification while maintaining low distortion and clean background. K9 Pro with the THX AAA 788+ produces a powerful thrust with a max power rating of up to 46Vpp when driving high-impedance loads. It supports up to 2W of undistorted output rating with low-impedance loads.

High-Res Audio Signal Decoding With MQA Support
FiiO has equipped the K9 Pro with latest-gen XMOS USB processor that enables the K9 Pro to decode high-resolution PCM and DSD audio signals. It also supports full MQA decoding bringing the users close to true high-res sound performance.

Fully Balanced Chips & Circuit Design
FiiO K9 Pro is a flagship-grade HiFi Audio DAC and Amplifier. It has a four-channel DAC, four-channel volume adjustment, and four-channel amp arranged in a truly balanced design. This balanced design ensures there is minimal interference in the audio signal.

Ultra-Low Jitter Clock Management System
FiiO K9 Pro has dual femtosecond clocks arranged in a precise clock management system. It provides ultra-low jitter in the output signal from multiple sources. Users can connect multiple connections with the K9 Pro without worrying about any kind of interference between them. This ultra-low jitter clock system makes it easier to handle different sources while maintaining maximum quality performance.

Six-Stage Audio Circuit
K9 Pro features a six-stage audio circuitry for true high-resolution performance. Whenever you play music with K9 Pro, the audio signal goes through I/V conversion, LPF Filter, Volume Control, Buffer Amplifier, Pre-AMP, and Output-Amp stages. The high-quality audio components on these circuits ensure you get ultra-low distortion and quality performance.

Qualcomm's Latest Bluetooth Chip
FiiO K9 Pro provides an excellent wireless Bluetooth connection that is highly stable and reliable. It is equipped with Qualcomm's latest QCC5124 Bluetooth chip bringing high-res wireless streaming to the K9 Pro. FiiO K9 Pro supports LDAC, AptX HD, AptX Adaptive, AptX, SBC, and AAC transmission codecs.

Multiple Input/Output Options
FiiO K9 Pro is a flagship-grade desktop DAC and Headphone Amp. FiiO has left no stone unturned in making the K9 Pro a feature-rich product. It has a plethora of input and output ports that includes Bluetooth, Coaxial, Optical, USB, RCA, 4.4mm for signal input and 4-pin XLR, 6.35mm, 4.4mm for headphone output, and RCA + XLR line-outs.

Key Features

• High-Performance Dual DAC Chipset(2xES9038 Pro).
• Clean and Powerful THX AAA 788+ amplification circuit.
• Premium XMOS XU208 USB processor.
• Dual independent femtosecond clocks.
• Qualcomm’s latest QCC5124 Bluetooth chip.
• Supports high-resolution LDAC, APTX HD, AptX Adaptive wireless transmission codecs.
• Fully balanced design.
• Dual voltage linear transformer.
• Supports MQA unfolding.
• Precise volume adjustment.
• Three gain modes.
• Multiple input/output options.
• Application control.
• Exceptional Aluminum chassis.

Technical Parameters

• Power supply: AC+Built-in linear power supply.
• Digital inputs: USB/Coaxial/Optical/Bluetooth.
• Analog Input: RCA/4.4mm Balanced.
• USB B and USB C connectors.
• Headphone outputs: 4-pin XLR/4.4mm Balances, 6.35mm single-ended.
• Line-out: RCA/XLR.
• Seven Digital Filters.
• PCM Decoding: Up to 32-Bit/384kHz.
• DSD256 native decoding.
• Audio clock: High-precision PLL+Dual crystal oscillators.
• Output power(SE): 2.1W(16Ω), 281mW(300Ω).
• Output power(Bal): 2.1W(32Ω), 1.1W(300Ω).
• THD+N: ≤0.00025%.
• SNR: ≥129dB.
• Line level: Up to 5Vrms.