Product Introduction

LM-805MKII is a high-end single-ended Class A vacuum tube integrated amplifier equipped with high-power 805 output tubes purpose-built for audio 

applications. Its refined direct-coupled signal path, formed by Russian 12AX7EH and 12BH7EH tubes, achieves optimal impedance matching, delivering 

extended transparent highs, well-defined layered lows, and warm, richly musical tonality.

Entirely hand-assembled with meticulous point-to-point wiring, the amplifier features premium components including German Mundorf coupling capacitors, dual wide-bandwidth EI output transformers, an exclusive custom toroidal power transformer, and a Japanese ALPS potentiometer for pristine signal 

integrity and stable performance. It offers external bias and HUM balance controls for tube rolling flexibility, five selectable inputs, infrared remote control 

and switchable backlight for effortless operation, plus high-voltage filament preheating and buffer circuits to extend component lifespan, making it a 

premium choice for vacuum tube amplifier enthusiasts.

- Elegant Black Panel: A luxurious and distinguished appearance.

- Single-Ended Class A Power Amplification: Utilizing high-power 805 vacuum tubes specially designed for audio output stages.

- External BIAS Adjustment & HUM Balance: Convenient controls for precise tube current and noise optimization.

- Tube Rolling Capability: Compatible with multiple brands of the same tube models, allowing you to explore different tonal flavors.

- Pure Handcrafted Build: Entirely hand-assembled with meticulous point-to-point wiring.

- German Mundorf Coupling Capacitors: Ensuring superior signal purity and tonal fidelity.

- Dual Wide-Bandwidth EI Output Transformers: High-quality transformers delivering extended frequency response and stability.

- Custom-Designed Toroidal Power Transformer: Specifically engineered for this amplifier to guarantee reliable performance.

- High-Voltage Delay & Filament Preheating: Extends the lifespan of vacuum tubes and ensures stable operation.

- Premium Japanese ALPS Potentiometer: For smooth, precise volume control.

- Infrared Remote Control: Convenient operation at your fingertips.

- Five sets of Input: Select-able via front-panel control knob or remote operation.

- Switchable Backlight Illumination: Eliminates potential minor interference caused by panel backlighting.

- High-Voltage Buffer Circuit: Effectively reduces inrush current at power-on for enhanced reliability.

- Refined Tube Amplification Path: Russian 12AX7EH tubes for voltage amplification, 12BH7EH

  drivers for 300B, directly coupled to 805 power tubes for optimal impedance matching-achieving extended highs, controlled and layered lows,    and a richly musical presentation.

Specification

Tube Complement: 12AX7*2, 12BH7*2, 805*2, 300B*2                              

Power output: 50W+50W (Class A Single Ended)

Frequency response: 20Hz~45kHz (-3dB)                 S/N Ratio: 87dB (A-weighting)

Input Sensitivity: Line 200mV  Pre 590mV                 Input Impedance: 100kΩ 

Output Impedance: 4Ω, 8Ω, 16Ω                                Power Consumption: 490W                          THD: 1% (1kHz)                                                         Net Weight: 53.5kg

Dimension (W×D×H): (432 x 465 x 279) mm