LUXMAN Earliest Batch w/ VFET & Pure Class A Input Stage | 5m21 Power Amplifier w/ Duo VU Meter SOLD

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Earliest Batch of LUXMAN Power Amplifier w/ VFET "Tube Sound"! 🤩 FULL of TUBE FLAVOUR w/ Organic & Natural Tone & Warmth! 🤩 
LUXMAN 早期批次 VFET 功率放大器，散发 "电子管音色"！🤩 充满电子管风味，具有有机、自然的音调与温暖！🤩
NOW ONLY RM !🤯 You CAN HAVE IT on your HIFI RACK!🤩 SHOW IT OFF ~
现在只需 RM 🤯！ 你就可以拥有它，放在你的音响架子上🤩！炫一炫它〜
CONDITION 品像: 8.5/10 = LIIKE NEW Condition | 新的一样

Pure Japan Craftmanship w/ Champagne Gold Faceplate🤩 & Warm Light VU Meter!
Dual Mono Design w/ Two Large Toroidal Transformer Made in Japan
8 units of VFET Output Transistors in Class A Biased Operation
Pure Class A Dual Differential Input Stage
Realtime Processed Technology
Large-capacity Custom Electrolytic Capacitors Made in Japan
纯正日本工艺，搭配香槟金面板 🤩 和温暖灯光的 VU 表头！  
双单声道设计，配备两颗大型日本制造的环形变压器  
8颗 VFET 输出晶体管，运行在 Class A 偏置模式  
纯 A 类双差分输入级  
实时处理技术  
大容量定制电解电容，日本制造，音质表现卓越  

SOUND QUALITY REVIEW（音色评测）:🤩
- Delivers exceptional clarity and precision in sound reproduction.  
- Produces a natural and balanced tonal signature across all frequencies.  
- Offers outstanding dynamic range, capable of handling subtle details and powerful crescendos equally well.  
- Provides a wide and immersive soundstage, enhancing spatial imaging.  
- High level of transparency ensures the music retains its original character.  
- Excellent bass response with deep, controlled low frequencies.  
- Midrange is rich and detailed, bringing vocal and instrumental textures to life.  
- Treble is smooth, refined, and free of harshness, maintaining a pleasant listening experience.  
- Capable of driving a variety of speakers effortlessly, showcasing versatility.  
- Suited for both critical listening and casual enjoyment, making it a versatile choice for audiophiles.  

- 提供卓越的清晰度和精准的声音重现。  
- 在所有频率范围内呈现自然且均衡的音色特性。  
- 动态范围出色，能够同样出色地处理细微细节和强劲的高潮部分。  
- 声场宽广且沉浸感十足，增强空间成像效果。  
- 高透明度确保音乐保留其原始特性。  
- 低频表现出色，低音深沉且控制良好。  
- 中频丰富且细腻，赋予人声和乐器质感生命力。  
- 高频平滑细腻，无刺耳感，确保听感愉悦。  
- 能够轻松驱动各种扬声器，展示了其多功能性。  
- 适合严谨的听音需求和日常欣赏，是发烧友的多用途选择。  

DESIGN &  TECHNOLOGY设计与科技:  
- Utilizes a parallel push-pull configuration with four large output power transistors in the output stage for enhanced performance.  
- Incorporates "Realtime Processed" technology addressing spatial waveforms and transient distortion for superior sound quality.  
- DC amplifier configuration minimizes phase distortion in low ranges and transient distortion in high ranges.  
- Features the proprietary DML-01 IC to counteract DC drift caused by temperature changes, enhancing stability and performance.  
- High-speed transistors, Schottky diodes, and cascode configurations in the driver and power stages reduce notching distortion and improve switching speed.  
- Implements an emitter-follower circuit with constant current drive to optimize high-frequency load conditions and insulation of circuits for A-class operation.  
- Basic performance is enhanced with cascode and constant current circuits strategically placed for stability and drift mitigation.  
- Independent left and right channel power supply design includes two toroidal transformers and large-capacity custom electrolytic capacitors for high efficiency and minimal interference.  
- Features a dual-channel VU meter with adjustable range (0 dB to -10 dB) for precise output monitoring.  
- Includes a DC offset sensor and input capacitor IN/OUT switching for protection against external DC components.  
- Independent input attenuators for left and right channels provide flexible control.  
- Three protection circuits ensure reliability: DC drift detection, high-temperature protection, and eddy current prevention.  
- Uses premium components, including metal film resistors and silbird mica capacitors, for superior noise reduction and temperature resilience.  
- Innovative horizontal heat sink design enhances thermal dissipation, and low-resistance speaker terminals improve connectivity.  
- Stacking design with metal brackets and supports prevents excessive load and ensures stability in multi-unit setups.  
- Optional EIA-standard rack-mount brackets were available for custom installation.  

- 采用并联推挽配置，输出阶段配备四个大功率输出晶体管以增强性能。  
- 引入“实时处理”技术，优化空间波形和瞬态失真以实现卓越的音质。  
- 直流放大器配置可最小化低频范围的相位失真和高频范围的瞬态失真。  
- 配备专有的DML-01 IC，通过应对温度变化引起的直流漂移，提高稳定性和性能。  
- 在驱动和功率阶段采用高速晶体管、肖特基二极管和共射级配置以减少切削失真并提高开关速度。  
- 实现带有恒流驱动的射极跟随电路，以优化高频负载条件并隔离A类运作电路的影响。  
- 通过战略性布置共射级和恒流电路增强基本性能，并减轻直流漂移。  
- 独立左右声道电源设计，包括两个环形变压器和大容量定制电解电容器，以提高效率并减少干扰。  
- 配备双声道VU表，可调范围（0 dB到-10 dB），实现精确的输出监控。  
- 包括直流偏移传感器和输入电容器开关（IN/OUT），保护免受外部直流分量的影响。  
- 独立的左右声道输入衰减器提供灵活控制。  
- 三种保护电路确保可靠性：直流漂移检测、高温保护以及涡流防护。  
- 使用优质元件，包括金属膜电阻和银云母电容器，具有出色的降噪和耐温性能。  
- 创新的水平散热片设计提高了热量散发效率，低阻抗扬声器端子改善了连接性。  
- 带有金属支架和支撑结构的堆叠设计，防止过重负载并确保多单元设置的稳定性。  
- 可选的EIA标准机架安装支架适用于定制安装。  

SPECIFICATIONS 规格:🧾
- Type: Stereo power amplifier  
- Continuous effective output: 100W + 100W (8 Ω, both channels simultaneously, 20 Hz to 20 kHz)  
- Total harmonic distortion: 0.005% or less (8 Ω, 100W, 20 Hz to 20 kHz)  
- Cross modulation distortion: 0.005% or less (8 Ω, 100W, 60 Hz: 7 kHz = 4:1)  
- Frequency characteristic: DC ~ 100 kHz (-1 dB)  
- Output bandwidth: 5 Hz to 100 kHz (-3 dB, 8 Ω, 0.1%)  
- Input sensitivity/impedance: 890 mV / 50 kΩ  
- Signal-to-noise ratio: 120 dB or more (IHF-A curve correction, input short circuit)  
- Residual noise: 0.1 mV or less (input shorted)  
- Crosstalk: -100 dB or less (100 Hz), -70 dB or less (20 Hz to 20 kHz)  
- Damping factor: 80 or more (8 Ω, 1 kHz)  
- Protection circuits:  
  - DC offset sensor  
  - Speaker protection circuit with DC drift detection  
  - Amplifier protection circuit detecting abnormal heat sink temperature  
  - Eddy current prevention circuit  
- Attachments:  
  - Independent left/right channel VU meter  
  - Meter range switching (0 dB → -10 dB)  
  - Input capacitor IN/OUT switching  
  - Independent left and right channel attenuator  
  - Terminal for peak indicator connection  
- AC outlet: Unswitched, 1 line, 500W  
- Power consumption: 450W (8 Ω, both channels at rated output)  
- External dimensions: Width 442 mm × Height 146 mm × Depth 400 mm  
- Weight: 19.0 kg  

REFERENCES 根据:🫡
1.https://www.hilberink.nl/luxman/5m21-5c50/luxman_5m20o.pdf
2.https://www.hifiengine.com/manual_library/luxman/5m21.shtml

🤩Can HELP U do 我们可以帮您:
HiFi Setup & Configuration 组装与设置
HiFi System Matching & Pairing 整体搭配
HiFi Tweaking 调音

AUDITION always WELCOMED 欢迎前来试听  
CODGuaranteed 100% HiFi Safety 一手交钱，一手交货，HiFi100%肯定安全  
POSTAGE / LALAMOVE w/ Additional Shipping Fee 邮寄需加额外运费   

🤩Deal Method 交易方式选择：
Option 选择 1: OPEN TO NEGO TIPIS!!! 开放商谈微扣价钱   (BUT NO LOWBALLER 腰砍价勿谈 )
Option 选择 2: OPEN for SWAP & TRADE IN 开放兑换和以旧换新   
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DISCLAIMER 免责声明: 
1. After Audition U LIKE THEN U BOUGHT, No DING DONG here & there, NO EXCUSING Don't like this or that afterwards. (Please be Considerate WE ARE BUSINESS)
2. After Purchase NO REFUND / RETURN. (TRADE IN BACK ALLOWED with Discussed Price)
3. No Compensation AFTER the day unit SOLD, take it home WITHIN THE DAY and TEST ON THE SPOT IMMEDIATELY.
4. NO WARRANTY AS DEFAULT for 2nd Second Products (UNLESS we STATED & VERIFIED in the Description)

1. 试听满意后再购买，买回家自己搭配好好慢慢玩，成交后没必要绕一大圈说不喜欢这个那个。（拜托了解与考虑做生意的角度）
2. 购买后不退货/不退款（允许以商定的价格以旧换新）。
3. 产品售出当天不再提供补偿，请当天提货并立即拿回家开机测试。
4. 二手产品默认无保修（除非我们在描述中明确说明并核实）。