High-performance monoblock power amplifier • 400W into 8 Ohms / 650W into 4 Ohms • fully balanced differential circuit topology • custom proprietary bipolar output transistors • massive toroidal power transformer • precision hand-crafted in Canada
The MOON 400M Mono-block Power Amplifier delivers effortless dynamic headroom, lightning-fast transient speed, and complete control over demanding loudspeaker loads. Engineered and built in Canada by Simaudio, this high-power monoblock amplifier generates a robust 400 Watts into 8 Ohms and 650 Watts into 4 Ohms. Utilizing a fully balanced differential circuit design, custom toroidal power transformer, and proprietary precision-matched bipolar output transistors, it provides grain-free clarity, organic harmonic detail, and an exceptionally silent noise floor for reference two-channel and home cinema systems.
Key Features & Innovations
Fully Balanced Differential Circuit Design — the MOON 400M Mono-block Power Amplifier leverages a no-overall-feedback, fully balanced circuit architecture to eliminate common-mode noise and maintain ultra-low distortion across the full audio spectrum.
400W continuous into 8 Ohms / 650W into 4 Ohms — high-current delivery guarantees massive dynamic impact and authoritative low-frequency control over low-impedance loudspeaker loads.
Custom Proprietary Bipolar Output Transistors — custom-matched MOON bipolar transistors offer unprecedented gain linearity and wide bandwidth, resulting in tight bass control and precise high-frequency air.
Over-Sized Custom Toroidal Power Supply — high-mass power transformer combined with a large capacitive reservoir ensures stable, instant voltage and current delivery during heavy musical peaks.
Class A Operation at Low Power Output — runs in pure Class A mode for the first few Watts of output, delivering silky, grain-free musicality during critical low-level listening sessions.
FAQ — MOON 400M
Are the MOON 400M Monoblock Amplifiers sold as a pair or individually?
The MOON 400M Mono-block Power Amplifier is priced and sold individually (each). For a standard two-channel stereo setup, two (2) monoblock units are required.
What types of audio input connections are supported?
The 400M features both a single-ended RCA input and a true balanced XLR input, selectable via a rear-panel toggle switch for optimal preamp matching.
Does this amplifier require a 12V trigger connection for remote power control?
Yes, it includes 12V trigger inputs and outputs (3.5mm mini-jacks) as well as SimLink™ communication ports for synced power on/off sequencing with connected MOON preamplifiers.
Where are MOON audio products manufactured?
Every MOON 400M monoblock power amplifier is designed, engineered, and hand-assembled at Simaudio's state-of-the-art facility in Quebec, Canada.
Why Buy From Us
Authorized MOON by Simaudio dealer offering 100% factory-authentic power amplifiers with full manufacturer warranty coverage
Expert hi-fi consultants available to guide preamplifier pairing, loudspeaker matching, and balanced cable selection
Dedicated post-purchase technical support for high-end stereo setup and system integration
Fast, secure freight shipping with protective heavy-duty packaging on every order
