Fiio K9 Desktop DAC and Headphone amplifier

Overview of the Fiio K9 

• High performance ES9068AS x 2 DAC
• THX AAA 788+ amplifier
• Dual-mode clock management
• QCC5124 Bluetooth
• LDAC/aptX Adaptive & other high-res Bluetooth format support
• App connectivity
• Truly balanced design
• Dual-voltage linear transformer
• Variety of inputs & outputs

HIGH-PERFORMANCE DUAL CORES

For soul-shaking sound

Two ES9068AS DACs handle the left and right channels and make up the high-quality "core" of the K9. Listen to your favourite playlist and be instantly immersed in the music.

HIGH-END AMPLIFIER

Refreshingly capable

The FiiO K9's ace up its sleeve is the THX AAA 788+ amplifier, giving it an extraordinary 1% undistorted power output up to 780mW at 300Ω and up to 2000mW at 32Ω. No matter if you use low-impedance or high-impedance headphones, the K9 will drive it with aplomb.

Fully balanced design

Music to your ears

From the DAC to the volume adjustment to the amplification, every part of the K9 is truly balanced for greatly reduced crosstalk and more authentic sound.

Partitioned design

For max performance of each section

The PCB of the K9 features a partitioned layout, fully separating the major sections of the audio circuit – the power supply, signals, and analogue signal loop. This guarantees the integrity of the audio signal being processed.

Six-stage audio circuit

The desktop-grade six-stage audio circuit was meticulously designed to ensure a pure, delicate yet rich sound.

ELECTRICITY IS THE MOTHER OF SOUND

Robust power supply

The linear transformer is paired with 4 massive 4700uF capacitors to provide clean continuous power.

Isolated digital & analogue section power supply

For purer sound

The digital and analogue portions of the K9 receive power separately to reduce interference between the two audio circuits, for pure and faithful reproduction of your music.

Multiple LDOs in multiple stages

Truly stable power

The power stabilisation and filtering within the audio circuit play a big part in ensuring excellent sound quality. Each stage of the audio circuit employs ultra-low-noise LDOs for voltage regulation.

DUAL-MODE CLOCK MANAGEMENT

Even more improvement to sound

Accurate and stable dual-mode clock management allows the K9 to easily play back hi-res audio with the greatest fidelity as if you are there with the performing artists.

*Supports up to 768kHz/32bit PCM & DSD512

HIGH-RES BLUETOOTH

The K9 employs the QCC5124 Bluetooth chip with support for LDAC/aptX HD/aptX Adaptive and other high-res Bluetooth formats. With the K9, you can listen to music, watch videos, and play video games with high quality & low latency.

*Bluetooth 5.1, supported formats: LDAC/aptX Adaptive/aptX/aptX HD/aptX LL/AAC/SBC

COMPATIBLE WITH UAC1.0/UAC2.0

The K9 supports both UAC1.0 and UAC2.0 modes, allowing you to use the K9 with either device that are simply plug-and-play or with devices that can work with the K9 with an additional driver for even better compatibility. The FiiO Control App allows you to easily switch between UAC1.0 and UAC2.0 modes.

*UAC1.0 for PS5 & other supported devices

COMPREHENSIVELY CAPABLE

Inputs: USB, optical, coaxial, RCA, 4.4mm

Outputs: 6.35mm SE, 4.4mm balanced, XLR-4 balanced

Five input signals: USB input/optical/coaxial/LINE/Bluetooth

*LINE mode includes RCA and 4.4mm input. If both are connected, the 4.4mm input is prioritised.

Three output modes: LO/PRE/PO

PROFESSIONAL PEQ

Through the FiiO Control app, you can quickly switch between 7 music tuning styles preset on the K9. If the preset tuning style is not to your liking, the 3 self-define PEQ (Parametric Equalizer) designs will help to fine adjust to your favourite listening style.

*Only valid for Bluetooth decoding.

TO SHOW OFF YOUR SKILLS

You can connect the K9 to your phone via Bluetooth, and with the addition of the FiiO Control app, you get access to even more functionality. Adjust various settings such as filters, status indicators, EQ, and channel balance to your liking.

*EQ only works in Bluetooth mode.

MULTIPLE INTELLIGENT PROTECTION SYSTEMS

Always ready to go

Three intelligent protection systems – preventing overheating, overload, and DC protection – constantly make sure that the K9 delivers high-energy music without wearing itself out.

BASIC SPECIFICATIONS:

DAC: ES9068AS x 2

Decoding chip: XMOS XUF 208

Amplifier: Dual THX AAA 788+

Bluetooth chip: QCC5124, Bluetooth 5.1

Bluetooth format support: LDAC/atpX Adaptive/aptX HD/aptX/aptX LL/AAC/SBC

Outputs: 6.35mm/4.4mm/XLR-4/RCA/XLR

Inputs: USB/OPT/COAX/RCA/4.4mm

Output power 1: L+R≥2000mW+2000mW (32Ω balanced/THD+N＜1%)

Output power 2: L+R≥780mW+780mW (300Ω balanced/THD+N＜1%)

SNR: ≥124dB (A-weighted, UAC)

Noise floor: PO＜4.8μV (A-weighted, UAC); BAL＜9.3μV (A-weighted, UAC)

Output impedance: ＜1Ω (32Ω load)

Weight: About 2.6kg

Dimensions: 200 x 224.5 x 72mm (excl. feet)