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FiiO - K9 Pro Desktop Bluetooth DAC/Amp (Pre-Order)

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Product Details from the Brand

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K9 PRO

FLAGSHIP DESKTOP DAC AND AMPLIFIER

Collector's AK4499 chip | THX-AAA 788+ Tech | Dual femtosecond clocks
Qualcomm QCC5124 | Supports LDAC/aptX adaptive/aptX HD | Truly balanced design
Dual voltage linear transformer | Wide connector selection | App control

SOMETHING YOU WILL WANT TO KEEP

The K9 Pro, conceived as a flagship from the very beginning, is designed to be uncompromising as both an amp and a DAC. Its outstanding performance will ensure you want to leave a spot for the K9 Pro in your collection of audio gear.

THE STRENGTH TO ALWAYS TRIUMPH

LEGENDARY AK4499E0

The K9 Pro is equipped with the legendary AKM AK4499EQ, renowned in the audio industry for its exceptional performance and unparalleled decoding capabilities, supporting up to 384 kHz and native DSD256 audio. And given its current scarcity, it is definitely a chip many are eager to experience.

384K sampling rate

DSD256 native decoding

LISTEN TO TRUE BEAUTY

THX AAA AMPLIFIER TECHNOLOGY

The THX AAA 788+ chips used in the K9 Pro provide exemplary details and dynamics no matter if you are using low or high-impedance headphones. The K9 Pro can output up to 46Vpp transients when driving high-impedance loads, and up to an undistorted 2W* when pushing low-impedance loads. Compared to the original, the output power of the K9 Pro has increased by more than 50% with higher heat dissipation efficiency.

*As tested in FiiO Labs under balanced out

PRECISE DESIGN FOR HIGHLY DEMANDING NEEDS

Fully differential, truly balanced design

Fully differential signals go through the four-channel DAC, four-channel volume adjustment, and four-channel amp for a truly balanced design. Such a design ensures minimal interference between different components in order to fully maintain all details and large dynamic swings in music for unmatched sound quality.

Clearly partitioned for smooth signal transmission

The PCB of the K9 Pro uses a partitioned layout, wherein not only the power supply and signals are separated, but the analog signal loop is also put in an independent section, guaranteeing the integrity of the audio signal being processed.

Six-stage audio circuit that holds up to scrutiny

Every audio signal goes through a mammoth 6-stage circuit to reproduce music as faithfully as possible with every last detail. I/V conversion, LPF filter, volume control, buffer amplifier, pre-amplification, output-amplification

ELECTRICITY IS THE MOTHER OF SOUND

Linear power supply

The K9 Pro's linear power supply, with its low-frequency transformer and high-capacity Nichicon capacitors, provides abundant clean power for the whole system

Isolated digital and analog power delivery

The digital portions of the K9 Pro receive power separately from the analog portions, for effective shielding against audio interference between the two circuits. Such a design leads to a highly pure, clean sound.

LDOs for each audio circuit stage

While the special high-performance transformer is, important to the K9 Pro's phenomenal sound, special attention was also paid to the power stabilization and filtering within the audio circuit. In each stage of the audio circuit, ultra-low-noise LDOs are employed for voltage regulation. No expense was spared in ensuring clean power supply, with the K9 Pro in total having a substantial amount of 20 LDOS!

DUAL FEMTOSECOND CLOCKS OF EXCELLENCE

The newest generation of XMOS chips supports dual-mode clock management technology. Under USB and Bluetooth decoding dual asynchronous femtosecond clocks are used, while under optical and coaxial decoding automatic PLL clocks are employed. A more precise clock management system makes it easier to handle any kind of source and maintain the maximum quality possible.

LOSSLESS MQA DECODING

The K9 Pro supports the unfolding of MQA tracks, allowing you to listen to high-resolution audio files that are not only reasonably sized, but also retain master-level sound quality that brings you directly into the recording studio.

FAST AND RELIABLE HI-RES BLUETOOTH

The K9 Pro employs the Qualcomm QCC5124 to handle Bluetooth duties, with support for formats such as LDAC, aptX HD and aptX Adaptive. This chip ensures that Bluetooth connections are both reliable and quick, satisfying both the low latency needs for games/videos and the high bitrate necessary for high resolution audio.

Bluetooth format support: AAC/SBC/aptX/aptX LL/aptX HD/ LDAC/aptX adaptive

ESSENTIALITY OF VOLUME ADJUSTMENT

Adjusting the volume may look like a simple concept, but a good execution of it is crucial to an excellent audio experience. The ADC curve reconstruction method of volume adjustment used in the K9 Pro effectively minimizes any left-right channel volume imbalance and noise. It also results in a smooth change of volume across all levels. This attention paid to the simple process of volume adjustment is just another layer to making sure you truly savor your music with the K9 Pro.

HEADPHONES COME ALIVE WITH A GOOD SOURCE

Switch between high, medium, and low gain to fit exactly your needs when listening to your particular pair of headphones. Thanks to the pure hardware gain circuit, even when listening at low gain with high-sensitivity headphones both dynamic range and musical fidelity remain uncompromised.

PERFECTION EXEMPLIFIED

The simple, yet elegant all-aluminum black exterior is anodized and finely sandblasted with painstaking craftsmanship for a textured, luxurious feel. Controls are clearly and intuitively laid out to make operating the device as smooth as possible. Rest assured, the K9 Pro is the very definition of a reliable and loyal music partner in your home.

LIGHTING UP THE MOOD

The stainless-steel volume knob blends seamlessly with the aluminum alloy front panel to give a luxurious experience while controlling your music. The RGB indicator lights surrounding the volume knob can light up differently depending on the currently playing sampling rate.

Blue: 48kHz sampling rate and below
Yellow: Above 48kHz sampling rate
Green: DSD

SWITCH QUICKLY TO YOUR MUSIC

Easy-to-use metal switches are used for controlling input selection and gain level to help you easily and quickly switch to your desired method of listening.

RICH SOUND FROM PLENTIFUL CONNECTORS

Front: XLR 4-pin, 4.4mm balanced, 6.35mm single-ended headphone outputs*

Rear: 4.4mm balanced Line In; coaxial, optical, RCA, XLR out; for more convenient connections to external amps and speakers

Side: USB Type-C port

*The 6.35mm output can be switched to 3.5mm with the adapter included in the package.

A TRUE RENAISSANCE MAN

Connect to home audio setup
(desktop USB audio + active HiFi speakers)

Connect to mobile devices
(players, computers)

Drive power-hungry headphones
(desktop USB audio + headphones)

RCA+XLR balanced line out
(for active speakers, monitor speakers, external amplifiers)

*When connected via Line out, you can quickly switch between fixed and variable output.

Side-mounted Type-C port for easy connection to mobile devices

App-controllable desktop amp
Built-in Bluetooth Low Energy (BLE) technology allows you to use the FiiO Control App to control functions like channel balance, sleep timer, etc. at any time, even when not in Bluetooth mode.

K SERIES COMPARISON

K5 Pro K9 Pro
Exterior
Dimensions 120*130*55mm 200*220*72mm
Weight About 436g About 2744g
Material & Color Aluminum alloy, black Aluminum alloy, black
Connectors
Power Supply DC adapter AC+built-in linear power supply
Digital Inputs USB /Optical/Coaxial USB/Optical/Coaxial/Bluetooth
Analog Inputs RCA RCA/Balanced-4.4mm
USB Connector USB B USB B/Type C
Headphone Out SE: 6.35mm Bal: XLR-4/4.4mm
SE: 6.35mm
Line Out RCA RCA/Balanced XLR
Features
USB CHIP XMOS XMOS
MQA / Rendering
Bluetooth / QCC5124
Audio Clock High precision PLL High precision PLL+ Dual crystal oscillators
DAC AK4493EQ AK4499EQ
Audio Circuit Stages 4 6
Output Selector / HP/LO/DAC
Gain 3 levels 3 levels
Amplifier TPA6120A2 Dual THX AAA-788+
Output Performance
Power Output (SE) 1500mW (32Ω)
188mW (300Ω)
1900mW (32Ω)
278mW (300Ω)
Power Output (BAL) / 2000mW(32Ω)
1100mW(300Ω)
Max Output Voltage 19.68Vpp 46Vpp
THD+N <0.004% <0.0003%
SNR >115dB >125dB
Other App Control / Android/iOS

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