Luxsin X9 Headphone Amplifier and DAC

Luxsin Audio X9

by Eversolo

• Advanced HP-EQ Tuning: Real-time EQ compensation based on your headphone’s frequency response, aligned with your choice of target curve and backed by a database of over 2500 headphone models.
• Precision Volume Control: Fully balanced R2R volume circuit with 0.1dB accuracy ensures impeccable left/right channel matching.
• Impedance Auto-Detection: Automatically measures headphone impedance and suggests optimal gain for perfect pairing and protection.
• True Flagship DAC: AK4499EX DAC + OPA1612 op-amp delivers ultra-low distortion (THD+N -120dB), 128dB dynamic range, and pristine clarity.
• Crossfeed & Adjustable Soundstage: Digital crossfeed for fatigue-free, speaker-like imaging plus fine control over soundstage width and depth.
• Elegant Touchscreen Interface: 4.0″ 1080P full-colour touchscreen with blackout mode and auto-standby for streamlined, high-definition control.
• Smart Visual Feedback: Dynamic VU meter with customizable styles reflects your music in real time.
• Full-Balanced Architecture: Every stage is differentially balanced, from input to output, for uncompromising purity and transparency.
• RTOS-Based Smart Control: Stable, low-latency system with remote, wireless, and OTA firmware update support.
• Dynamic Negative Feedback (DNF): Proprietary distortion-reduction circuit ensures transparency and micro-detail.
• Elegant CNC Design: Diamond-cut aluminum chassis with a 15° incline for ergonomic and aesthetic excellence

Auto Headphone Equalizer

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

 

Crossfeed and Adjustable Soundstage

The X9 features advanced digital crossfeed for a natural, speaker-like sound, reducing fatigue during long sessions. Crossfeed is the process of slightly blending the left and right channels of a stereo audio recording with time delays. This can make audio played through headphones sound more natural, and closer to listening to a pair of speakers, where the left ear hears some sound from the right channel, and vice versa. 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.

 

 

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.

 

 

 

Headphone Amp + Desktop Preamp

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.

 

 

Diamond-cut design

The diamond-cut bevel design of the front panel, set at a 15° incline, not only enhances its aesthetic appeal but also improves ergonomic touch control. The full CNC-machined aluminum chassis ensures excellent heat dissipation, durability, and a sleek, elegant appearance.

 

4.0-inch 1080P Full-Colour Touchscreen

Featuring a 4.0-inch 1080P full-colour touchscreen, X9 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.

 

 

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.

 

Smart Control

The X9 runs on an advanced automotive-grade RTOS, ensuring stable and efficient control of all I/O interfaces. It supports both infrared remote control and wireless control via smartphone or computer, with OTA updates for easy firmware upgrades and ongoing performance improvements.

 

 

Flagship Components

With an ultra-low ripple of just 40nV, the motherboard features a star-shaped voltage distribution circuit that cleanly separates digital and analog power paths. The AK4499EX DAC is stabilized by an OPA1612 op-amp, providing an ultra-stable reference voltage for highly accurate signal processing. With a THD+N of -120dB, the system delivers outstanding clarity, resolution, and dynamic range. 

 

Precision Perfected

Engineered with a fully balanced R2R volume control circuit composed of high-precision components, X9 has left-right channel balance adjustments with exceptional accuracy of 0.1dB, ensuring precise and distortion-free audio performance.

 

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.

 

Truly Balanced

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.

 

Audiophile-Grade Components

To achieve ultimate sound quality, every component has been meticulously chosen. This includes premium red WIMA capacitors, gold-plated aluminum electrolytic capacitors, high-grade green non-polarized capacitors, numerous 0.1% high-precision low-temperature drift resistors, femtosecond clock, gold-plated connectors, Ohno Continuous Cast (OCC) silver-plated cables, and TI BB’s OPA1612 op-amps.

 

Specs

 

 

Audio

Play & DAC

support DSD512，PCM 768KHz 32-bit

Bluetooth audio input

BT5.0，support AAC/SBC

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

 

Detail and Dimensions

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

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

Color

Silver

Weight

3.72kg

Operation method

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

 

Input

USB-A Port

For Firmware Updates Only

USB- B Port

USB Audio System Compatibility: Windows (10, 11), Android, iOS; Supports up to Stereo DSD512, PCM 768kHz/32-Bit

USB Type-C

USB Audio System Compatibility: Windows (10, 11), Android, iOS; Supports up to Stereo DSD512, PCM 768kHz/32-Bit

Analog (unbalanced input)

RAC*2（unbalanced），Max Gain +10dB

Optical

Support up to PCM 192KHz 24-bit，DoP64

Coaxial

RAC*1

Bluetoth input

BT5.0，support AAC/SBC

HDMI ARC

support PCM 192KHz 24-bit

TRIGGER Connection

3.5mm Headphone Jack (TRIGGER IN ×1 + TRIGGER OUT ×1)

WiFi

WiFi 2.4G / 5G

Volume Knob

Encoder Knob

Power Button

Single Press: Mute, Long Press: Standby

Power Switch

Rocker Switch

Power Supply

AC 100-240V~50/60Hz

Controller

12-Button Infrared Remote Control

 

Output

Balanced Circuit Output

XLR3 Balanced Socket

Unbalanced Circuit Output

RCA*2

Subwoofer Output

RCA*2

Balanced Headphone Output

4.4mm Socket ×1 + XLR4 Balanced Socket ×1

Unbalalced Headphone Output

6.35mm Socket