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Luxsin X9 Headphone amplifier with integrated DAC, AKM's flagship AK4499EX chip, is designed to meet the exacting standards of audiophiles and high-fidelity sound enthusiasts, Luxsin X9 seamlessly blends powerful hardware with a sleek, functional design to deliver pure and captivating sound. Innovative in-house developed features provide a uniquely immersive listening experience, while the intuitive software system ensures effortless and efficient operation.

Luxsin X9 - True Flagship
With an ultra-low ripple suppression ratio of just 40nV, the motherboard features a star-shaped voltage distribution circuit that effectively separates digital and analog voltage paths. The AK4499EX DAC chip is stabilized by OPA1612 op-amp regulation, ensuring an ultra-stable reference voltage that allows the sound to unfold like an endless ocean, with a deep, pitch-black background. THD+N achieves an impressive -120dB, delivering extraordinary clarity and precision.

Headphone AMP and Desktop preAMP in one

The X9 is equipped with an extensive range of connectivity options, including HDMI ARC, optical, coaxial, analog inputs, USB-B/USB-C, 12V trigger ports, and dual subwoofer outputs. This allows for seamless integration into various audio setups, providing flexibility for both home and professional audio environments. As a reference-grade DAC, headphone amplifier, and preamplifier, the X9 delivers exceptional signal control and dynamic audio performance, setting a new standard in desktop audio.

TECHNICAL SPECIFICATIONS

Manual (PDF)
Luxsin X9 PDF Manual ()

Play & DAC
support DSD512，PCM 768KHz 32-bit

Bluetooth audio input
BT5.0，support SBC/AAC

USB-B audio input
support Windows (10, 11)，Android，IOS。support DSD512，PCM 768KHz 32-bit

Optical/Coaxial audio input
support PCM 192KHz 24-bit，DoP64

HDMI ARC
support PCM 192KHz 24-bit

Analog input
RCA（unbalance），max gain +10dB

Analog audio output interface
XLR (balanced)+RCA (unbalanced)+subwoofer output

XLR Audio Output
output level 4.2Vrms 0dBFS

Frequency Response：20Hz~20KHz (±0.25dB)

Dynamic Range：> 128dB

Signal-to-Noise Ratio (SNR)：>128dB

THD+N：0.000096% (-120.3dB) Unweighted

Crosstalk：>-117dB

RCA Audio Output
output level 2.1Vrms 0dBFS

Frequency Response：20Hz~20KHz (±0.25dB)

Dynamic Range：> 125dB

Signal-to-Noise Ratio (SNR)：>125dB

THD+N：0.00010% (-119dB) Unweighted

Crosstalk：>-114dB

Headphone Audio Output
output level 4-15Vrms 0dBFS

Frequency Response：20Hz~20KHz (±0.25dB)

Dynamic Range：> 128dB

Signal-to-Noise Ratio (SNR)：>128dB

THD+N：0.00016% (-116dB) Unweighted

Dimension
Width: 300mm * Length: 206mm * Height: 65mm

Power supply
Ultra-Low Noise Linear Power Supply

Rated Power
25W

Packing list
Power Cable ×1, Remote Controller ×1, USB-B Cable×1, Type-C OTG Cable×1, User Manual ×1

Weight
3.72kg

Operation method
Touchscreen, Infrared + Bluetooth Remote Control, Luxsin App (compatible with Android and iOS)

Detail
Model
X9

Display
4-inch TFT Fully Laminated Touchscreen（960X400）

Hardware solution
DAC：AK4191EQ+AK4499EX USB: XMOS XU316；Bluetooth decoding：QCC5125

Audio processor
AKM 7739 DSP

Op-Amp chip
OPA1612

Color
Silver

Headphone Impedance Self-Check System
Luxsin’s self-developed impedance detection system automatically measures the impedance of connected headphones via the 6.35mm or 4.4mm ports and intelligently recommends the most suitable output gain setting. Utilizing advanced bypass detection technology, this system ensures precise impedance measurement with zero impact on sound quality.

Crossfeed and Adjustable Soundstage
The X9 features advanced digital crossfeed for a natural, speaker-like sound, reducing fatigue during long sessions. Users can also adjust soundstage depth and width, with both features implemented digitally to ensure precise control without the distortion or coloration typical of analog solutions

Visible Rhythm
The X9 features a dynamic VU meter that visually captures every subtle fluctuation in the audio, providing a real-time graphical representation of the sound. With multiple VU meter styles to choose from, users can personalize their visual experience while enjoying the music.

4.0-inch 1080P Full-Color Touchscreen
Featuring a 4.0-inch 1080P full-color touchscreen, it offers a vibrant, high-definition display for an intuitive and visually engaging user experience. The display can be turned off for a completely immersive, blackout listening experience, while the device automatically enters standby mode when no signal is detected, ensuring efficiency and convenience.

Precision Perfected
Engineered with a fully balanced R2R volume control circuit composed of high-precision components, it enables left-right channel balance adjustments with exceptional accuracy of 0.1dB, ensuring precise and distortion-free audio performance.

True Full Balance
Every stage, from signal input decoding and AK4499EX DAC to OP1612 IV conversion, LPF filtering, R2R volume control, dynamic feedback, and the 6120A2 headphone amplifier, is powered by a fully differential balanced circuit. This design ensures uncompromising audio performance, delivering unparalleled sound clarity, precision, and depth.

Dynamic Negative Feedback
Luxsin Dynamic Negative Feedback (DNF) technology, utilizing the OPA1612 + TPA6120A2 combination, significantly reduces harmonic and intermodulation distortion, ensuring a cleaner, more transparent sound with minimal coloration while accurately reproducing every sonic detail. This advanced design enhances tonal purity and dynamic expression, delivering a refined and immersive listening experience.

HP-EQ
The X9’s unique HP-EQ technology applies real-time hardware-level EQ adjustments based on each headphone’s frequency response. This enables a sound signature closely aligned with the ideal Harman curve, providing an audio experience that resonates with a wide range of listener preferences. It also supports custom EQ profiles with one-click switching, backed by a growing database of over 2500 headphone models.