MOON 400M – Reference high-end monoblock power amplifier

The MOON 400M by Simaudio is a high-end monoblock power amplifier engineered to deliver true reference-level performance in the most demanding hi-fi and high-end audio systems. Featuring a sophisticated fully balanced architecture and an oversized power supply, the 400M combines extraordinary driving capability, speed and tonal refinement in a compact yet exceptionally powerful design.

Designed to control even the most difficult loudspeakers with complete authority, the MOON 400M delivers 400 watts into 8 ohms and 650 watts into 4 ohms, maintaining exceptional bass grip, natural harmonic structure and impressive dynamics even at high listening levels.

The amplifier incorporates MOON’s renowned proprietary Advanced Renaissance technology, a no-global-feedback circuit developed to eliminate phase errors and intermodulation distortion while improving speed, accuracy and musical coherence. Fully balanced circuitry and proprietary MOON bipolar output transistors ensure exceptionally linear and natural amplification.

The oversized low-noise custom toroidal transformer combined with 85,000 µF of power supply capacitance guarantees massive current delivery, lightning-fast transient response and excellent stability with demanding speaker loads.

The MOON 400M operates in pure Class A up to 10 watts before transitioning into Class AB for greater efficiency and lower thermal dissipation. Its rigid anti-resonance chassis and carefully selected components minimise vibration and background noise while preserving absolute signal purity.

During listening sessions, the MOON 400M delivers a presentation that is simultaneously powerful and highly refined, with deep controlled bass, rich and realistic midrange reproduction and sweet, detailed and natural treble. The soundstage is expansive, holographic and remarkably stable, with exceptional ambience retrieval and micro-detail resolution.

Manufactured in Canada to the highest construction standards, the MOON 400M is the ultimate solution for audiophiles seeking absolute musicality, massive dynamic headroom and uncompromising loudspeaker control.

Key Features

• High-end monoblock power amplifier
• 400 W into 8 Ω and 650 W into 4 Ω
• Fully balanced architecture
• Proprietary Advanced Renaissance technology
• No global feedback design
• Class A operation up to 10 W
• Oversized custom toroidal transformer
• 85,000 µF power supply capacitance
• Proprietary MOON bipolar output transistors
• Balanced XLR and single-ended RCA inputs
• 12V trigger and RS-232 connectivity
• High-end construction Made in Canada

Technical Specifications

• Type: monoblock power amplifier
• Configuration: fully balanced differential mono
• Power output into 8 Ω: 400 W
• Power output into 4 Ω: 650 W
• Class of operation: Class A / AB
• Class A operation: up to 10 W
• Transformer: custom low-noise toroidal transformer
• Power supply capacitance: 85,000 µF
• Inputs: 1 x RCA, 1 x XLR
• Input impedance: 47,500 Ω
• Input sensitivity: 800 mV RMS
• Frequency response: 10 Hz – 125 kHz (+0 / -3 dB)
• THD: < 0.05%
• Signal-to-noise ratio: > 106 dB
• Damping factor: 800
• Maximum current: 56 A peak
• Dimensions: 42.9 x 8.9 x 35.6 cm
• Weight: 15 kg
• Manufacturing: Made in Canada

The MOON 400M is a monoblock amplifier engineered to deliver absolute control, monumental dynamics and exceptionally refined musical reproduction, making it one of the finest high-end solutions available for reference hi-fi systems.