Moon by Simaudio 400M Power Amplifier

You will need two 400M units to create a stereo system—one for the left channel and one for the right. This mono-block design is specifically engineered to isolate channels completely, which significantly reduces crosstalk and improves overall soundstage clarity.

With 400 watts into 8 ohms and 650 watts into 4 ohms, the 400M is designed to handle almost any loudspeaker on the market. Its high damping factor ensures it maintains tight control over the woofer, providing the authority and slam needed for demanding, low-impedance speakers.

The 400M operates in pure Class A for the first 10 watts of output. This ensures that the most critical, low-level musical details are reproduced with the warmth and fluidity associated with Class A designs, before transitioning to a highly efficient Class AB operation for higher power demands.

Yes, the 400M is built for custom installations. It features both 12V triggers and an RS-232 port, allowing you to power the unit on and off automatically alongside your preamplifier or control system.

Because the 400M is a high-performance power amplifier, it performs best when paired with a high-quality, balanced preamplifier. Using a balanced connection between your preamp and the 400M will take full advantage of its fully balanced differential circuitry, resulting in lower noise and better signal integrity.

While it has plenty of power for large spaces, its refined, detailed sound signature makes it excellent for smaller rooms as well. Because it maintains composure and finesse even at lower volumes, you won't lose the nuance of your music just because you aren't pushing the amplifier to its limits.