Luxsin X9 Headphone Amplifier DAC & Pre Amplifier
Luxsin X9 Headphone Amplifier DAC & Pre Amplifier
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Score: 5 / 5 Mint
The Luxsin X9 is a reference-grade DAC, headphone amplifier, and desktop preamplifier designed for audiophiles seeking flagship signal purity, advanced digital signal processing, and extensive system connectivity. Engineered around an AKM flagship decoding pipeline combining the AK4191EQ digital delta-sigma modulator with the AK4499EX DAC, the X9 utilizes XMOS XU316 USB processing, an AKM 7739 DSP, and TI OPA1612 operational amplifiers to deliver ultra-low distortion (THD+N < 0.000096%) and an exceptional dynamic range exceeding 128 dB.
Housed in a full CNC-machined aluminium chassis with a 15° inclined diamond-cut front panel, the X9 features a 4.0-inch 960x400 fully laminated colour touchscreen with customizable VU meters. Highlights include a fully balanced R2R volume control circuit for 0.1dB channel tracking accuracy, a self-checking Headphone Impedance Auto-Detection system, digital crossfeed and soundstage adjustments, and a proprietary HP-EQ system containing real-time EQ target profiles for over 2,500 headphone models tailored toward the Harman curve. Equipped with 4.4mm, 4-pin XLR, and 6.35mm headphone outputs alongside RCA/XLR preamp outs, dual subwoofer outputs, and HDMI ARC, it functions seamlessly across desktop and home theatre setups.
KEY FEATURES & PROPRIETARY TECHNOLOGIES
- AKM AK4191EQ + AK4499EX Flagship DAC Architecture: Separates digital modulation and analogue conversion stages, backed by an XMOS XU316 USB receiver, Accusilicon femtosecond clocks, and TI OPA1612 IV conversion.
- HP-EQ Harman-Target Tuning System: Integrated DSP database with over 2,500 headphone profiles offering real-time hardware-level frequency adjustments and custom EQ presets via OTA updates.
- Auto-Impedance Detection & Gain Recommendation: Measures headphone load impedance via 6.35mm and 4.4mm jacks using non-intrusive bypass detection to suggest optimal output gain.
- Fully Balanced Precision R2R Volume Control: Discrete resistor ladder volume network providing distortion-free attenuation and channel balance accuracy within 0.1 dB.
- Fully Differential Signal Path & DNF Technology: Fully balanced circuit topology from DAC to TPA6120A2 / OPA1612 driver stages incorporating Luxsin Dynamic Negative Feedback (DNF) for transparent sound reproduction.
- Customizable Digital Crossfeed & Soundstage Adjustment: Digital processing algorithms reduce listening fatigue by simulating natural speaker imaging and allowing soundstage depth/width tuning.
- 4.0-Inch Touchscreen & Dynamic VU Meters: Laminated 960x400 colour TFT display offers touchscreen control, real-time graphical VU meter styles, and display blackout modes.
- Extensive Desktop & AV Connectivity: Features HDMI ARC, USB-B, USB-C, Optical, Coaxial, RCA Analog In, 12V Trigger I/O, RCA/XLR Preamp Out, and Dual Subwoofer RCA outputs.
SPECIFICATIONS
| Specification | Detail |
|---|---|
| Product Category | Desktop DAC, Headphone Amplifier & Preamplifier |
| Brand / Model | Luxsin X9 |
| DAC & Processing Architecture | AKM AK4191EQ Modulator + AK4499EX DAC | AKM 7739 DSP | XMOS XU316 USB |
| Clocking & Op-Amps | Accusilicon Femtosecond Oscillators | Texas Instruments OPA1612 |
| Headphone Amp Topology | Fully Differential Balanced (OPA1612 + TPA6120A2 with Dynamic Negative Feedback) |
| Volume Control Type | Fully Balanced Resistor Ladder (R2R) Network (0.1 dB Step Precision) |
| Display | 4.0-inch Fully Laminated Color TFT Touchscreen (960 x 400 Resolution) |
| Digital Audio Inputs | 1x USB-B, 1x USB-C, 1x Optical Toslink, 1x Coaxial RCA, 1x HDMI ARC |
| Analog Audio Inputs | 1x Stereo RCA Pair (Unbalanced, Max Gain +10 dB) |
| Wireless Input | Bluetooth 5.0 (Qualcomm QCC5125 | Supports SBC / AAC) |
| Digital Resolution Support | USB-B / USB-C: PCM up to 768 kHz/32-bit, Native DSD512 Optical / Coaxial / HDMI ARC: PCM up to 192 kHz/24-bit, DoP64 |
| Headphone Outputs | 1x 4.4mm Balanced, 1x 4-Pin XLR Balanced, 1x 6.35mm Single-Ended |
| Line & Preamp Outputs | 1x Stereo XLR Balanced, 1x Stereo RCA Unbalanced, 2x RCA Subwoofer Outputs |
| Headphone Output Voltage & Performance | 4–15 Vrms @ 0dBFS | Dynamic Range: >128 dB | SNR: >128 dB | THD+N: <0.00016% (-116 dB) |
| XLR Balanced Output Performance | Output Level: 4.2 Vrms @ 0dBFS | Dynamic Range: >128 dB | SNR: >128 dB | THD+N: <0.000096% (-120.3 dB) | Crosstalk: >-117 dB |
| RCA Unbalanced Output Performance | Output Level: 2.1 Vrms @ 0dBFS | Dynamic Range: >125 dB | SNR: >125 dB | THD+N: <0.00010% (-119 dB) | Crosstalk: >-114 dB |
| Frequency Response | 20 Hz – 20,000 Hz (±0.25 dB) |
| System Automation | 3.5mm 12V Trigger In x1, 12V Trigger Out x1, USB-A Port (Firmware Updates Only) |
| Control Methods | Front Touchscreen, 12-Button IR Remote, Luxsin Control App (Android / iOS) |
| Chassis Construction & Power Supply | CNC-Machined Aluminum (15° Bevel Incline) | Ultra-Low Noise Linear Power Supply (40nV Ripple, 25W Rated) |
| Dimensions (W x D x H) | 300 x 206 x 65 mm |
| Net Weight | 3.72 kg |
Pre-owned Terms & Condition
Pre-owned Terms & Condition
Our Grading Guarantee
All equipment listed on this site undergoes a multi-point inspection by our staff. While we use a standardised 1–5 Grading Scale, please note that "pre-owned" implies some degree of previous life. We strive for transparency and use the following terms:
- Visual Inspection: Condition grades are subjective but applied conservatively. We provide high-resolution photography of the actual unit for sale (no stock photos). We encourage buyers to zoom in on all images as they constitute part of the formal product description.
- Functional Testing: Unless labelled Grade 1 , all units have been tested for power, input/output integrity, and basic mechanical operation. Vintage units (20+ years) are tested for "period-appropriate" functionality; unless specified, internal components like capacitors are original.
- "Fair" Exclusions: Items graded 1 (Fair) are sold strictly for parts or repair. These items are ineligible for returns, refunds, or "Item Not as Described" claims regarding their condition.
- Return Window: If a unit arrives in a condition significantly different than its assigned grade (e.g., a Grade 4 unit arrives with a shattered faceplate), you must notify us within 24 hours of delivery.
Condition Grading Guide
Condition Grading Guide
Mint
Visually and mechanically indistinguishable from a new unit.
Excellent
Extremely clean. The item has been handled with care and shows only the slightest signs of use.
Very Good
Looks "used" but has been respected.
Good
Functional, but shows its age.
Fair
Functional, but may have some damage or missing parts.
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