MOON 861 – Reference dual mono stereo power amplifier

The MOON 861 by Simaudio is one of the most advanced and refined stereo power amplifiers ever created by the Canadian manufacturer. Part of the prestigious North Collection, this Reference-level amplifier has been engineered to deliver absolute control, limitless dynamics and extraordinary transparency, even with the most demanding loudspeakers.

Built around a sophisticated fully balanced dual mono architecture, the MOON 861 inherits key engineering solutions from the legendary MOON 888 monoblock amplifier while integrating Simaudio’s latest innovations, including the revolutionary proprietary MDCA (MOON Distortion Cancelling Amplifier) circuit, specifically developed to dramatically reduce distortion without relying on conventional global feedback.

Delivering 300 watts per channel into 8 ohms and 600 watts into 4 ohms, the MOON 861 drives virtually any high-end loudspeaker with complete authority, maintaining exceptional bass control, remarkable speed and outstanding tonal naturalness. The amplifier can also operate in bridged mono mode for even greater performance capability.

The power supply features two massive custom low-noise 1500 VA toroidal transformers combined with 240,000 µF of total capacitance, ensuring virtually unlimited current delivery, exceptional microdynamic precision and lightning-fast transient response.

The ultra-rigid chassis construction, oversized side-mounted heatsinks and fully symmetrical internal layout minimise vibration, noise and interference while preserving the integrity of the audio signal.

During listening sessions, the MOON 861 delivers a monumental yet perfectly controlled presentation, with deep and lightning-fast bass, incredibly realistic midrange reproduction and refined, extended treble free from harshness. The soundstage is expansive, stable and holographic, capable of recreating extraordinary depth, ambience and micro-detail.

The MOON 861 is the ideal choice for reference hi-fi and high-end systems demanding uncompromising performance, natural musicality and exceptional loudspeaker control.

Key Features

• Reference dual mono stereo power amplifier
• Fully balanced architecture
• Proprietary MDCA technology
• No global feedback design
• 300 W per channel into 8 Ω
• 600 W per channel into 4 Ω
• Bridgeable mono operation up to 800 W into 8 Ω
• Dual custom 1500 VA toroidal transformers
• 240,000 µF power supply capacitance
• Balanced XLR and single-ended RCA inputs
• MOONLink system integration
• Reference-grade construction Made in Canada

Technical Specifications

• Type: dual mono stereo power amplifier
• Stereo power 8 Ω: 300 W per channel
• Stereo power 4 Ω: 600 W per channel
• Mono power 8 Ω: 800 W
• Configuration: fully balanced dual mono
• Technology: MDCA (MOON Distortion Cancelling Amplifier)
• Transformers: 2 x 1500 VA low-noise toroidal transformers
• Power supply capacitance: 240,000 µF
• Frequency response: 2 Hz – 100 kHz (+0 / -3 dB)
• THD: 0.001%
• Signal-to-noise ratio: 119 dB
• Damping factor: 900
• Inputs: single-ended RCA, balanced XLR
• Standby power consumption: 1.25 W
• Dimensions: 48.1 x 21 x 60.9 cm
• Weight: 58 kg
• Manufacturing: Made in Canada

The MOON 861 represents the pinnacle of high-end stereo amplification, combining monumental power, refined musicality and absolute control to drive any loudspeaker with effortless precision and realism.