Moon Neo 400M Mono Power Amplifier

SKU 400M

High Performance 400 Watt Mono Power Amplifier



Available in


In stock

Product Enquiry
Add to Wishlist
Add to Wishlist
own it from $10/wklearn more »

Extremely powerful, yet with a delicacy and articulation of the best amplifiers out there, the Nēo 400M can take on virtually any loudspeaker you connect it to. Delivering a bottom-end slam, with authority and weight to the foundation of the music, it will transport you into a live concert environment. On the top end of the musical spectrum, the Nēo 400M delivers finesse, detail and refinement that can challenge your perception of reality vs. recorded music.

When used in conjunction with the Nēo 350P Preamplifier, the results are without equal. There isn’t a more refined combination at this price point. An ultimate combination for the discerning music lover, and for those who like to listen at higher sound levels. Of course, key features you’d expect in a MOON Nēo Series product are present such as 12V triggers and an RS-232 port for custom-install environments. Finally, the Nēo 400M is available in three different finishes: the standard “all black”, as well as special order “all silver” or “2-tone” (black & silver):

Nēo 400M Technical Features

· A “no overall feedback” design resulting in genuine real-time amplification, a more accurate musical reproduction with respect to tonality, virtually non-existent intermodulation distortion and the elimination of common phase errors resulting from feedback · An oversized power supply · Custom proprietary toroidal transformer design with lower magnetic, electrical and thermal loss, yielding an improved power transfer and lower regulation factor. The result is increased current speed and better dynamics · Precision matched proprietary MOON Bipolar output transistors with unprecedented gain linearity, resulting in improved bass response and even more accurate sonic reproduction · A high damping factor for superior musical dynamics, improved signal speed and refined timbre accuracy · Fully balanced differential circuitry · “Class A” output to 10 watts for greater efficiency · 12 Volt trigger input/output for remote operations · RS-232 port for (i) full unsolicited bidirectional feedback and (ii) firmware updates · Rigid chassis construction to minimize the effects of external vibrations · Optimized selection of very high quality electronic components · Low operating temperature for an ultra-long life expectancy.

Nēo 400M Detailed Specifications

Type Solid State
Configuration Mono – Differential
Power Supply Transformers 400VA
Power Supply Capacitance 85,000µF
Class Of Operation A/AB
Balanced Inputs XLR – 1
Single-ended Inputs RCA – 1
Input Device Type J-FETs
Input Impedance 47.5KΩ
Input Sensitivity 800mV RMS
Output Device Type Bipolars – 8
Output Binding Posts 1 pair – 5-way, Gold-plated, Shielded
Output Power @ 8Ω 400 Watts
Output Power @ 4Ω 650 Watts
Frequency Response 10Hz – 125kHz   (+0/-3dB)
Output Impedance < 0.01Ω
Damping Factor   (static) > 800
Gain 36dB
Signal-to-noise Ratio 106dB @ full power
Maximum Output Voltage 60 Volts
Slew Rate 60 V/µs
Maximum Current – Peak 56 amperes
Maximum Current – Continuous 26 amperes
IMD Unmeasureable
THD   (20Hz – 20kHz @ 1 watt) 0.02%
THD   (20Hz – 20kHz @ 400 watts) 0.05%
12 Volt Trigger Input/Output Operation Direct Logic (0V = off, 12V=on) using a 3.5mm mono jack with an output impedance of 1000Ω and current requirement of 12mA
RS-232 Port 9-pin female DB connector
Power Consumption @ idle 36 Watts
AC Power Requirements 120V / 60Hz   220-240V / 50Hz
Fuse Replacement   120V   /   220-240V 8.0A long fast blow   /   4.0 long fast blow
Shipping weight 34 lbs / 15 kgs
Dimensions   (W x H x D) 16.9 x 3.5 x 14.0 in.   (42.9 x 8.9 x 35.6 cm.)
15.0000 kg



Class AB



Depth (mm)


Height (mm)


high current output

±55 amps


Moon Neo 400M

power output 4 ohm

600 Watts

power output 8 ohm

400 Watts


Mono Power Amplifier

Width (mm)


xlr inputs


home theatre amplifiers

Power Amplifiers

powered channels


power output per channel

>151 Watts per Channel

Brand Logo

Moon specialises in custom home audio solutions, from custom handmade cables to headphone modification services.