The MOON 400M is a differential mono power amplifier that produces 400 watts into 8? and 650 Watts into 4?. Based on our highly acclaimed Advanced Renaissance amplifier circuitry, the class A/AB, zero global feedback, DC-coupled 400M is capable of producing tight, deep and powerful bass with lightning fast speed; True high-performance in a compact package without compromise. Possessing a high damping factor, an incredibly low noise floor, excellent dynamic range and a transparent lifelike soundstage, the MOON 400M will effortlessly drive any loudspeaker. Even difficult loads will not impede its ability to remain exceedingly musical and accurate.

Our own unique heat-sink geometry allows for ultra-effective and efficient cooling. The amplifier?s oversized power supply contains a large proprietary toroidal transformer and substantial energy storage. Finally, with both balanced (XLR) and single-ended (RCA) inputs, the MOON 400M represents the ultimate choice for performance and affordability.

• 12 Volt Trigger input and output
• 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
• Fully balanced differential circuitry
• Class A output to 10 watts for greater efficiency
• Proprietary MOON Bipolar output transistors with unprecedented gain linearity resulting in improved bass response and even more accurate sonic reproduction
• A high damping factor yielding superior musical dynamics, improved signal speed and refined timbre accuracy
• RS-232 port for (i) full unsolicited bidirectional feedback in custom installation setups and (ii) firmware updates
• PCB w/ pure copper tracings & gold plating that yields low impedance characteristics
• Extremely rigid chassis construction to minimize the effects of external vibrations
• Accurate matching of the very finest high quality electronic components in a symmetrical circuit design
• Designed to be powered up at all times for optimal performance
  Low operating temperature to ensure a longer than normal life expectancy
Design features

• Fully balanced differential circuitry.

• Precision matched proprietary MOON Bipolar output transistors for improved bass response and accurate sonic reproduction.

• An oversized power supply using a custom proprietary toroidal transformer design.

• A high damping factor yielding superior musical dynamics, improved signal speed & refined timbre accuracy.

• “Class A” output to 10 watts for greater efficiency.

• Optimized selection of very high quality electronic components.

Specifications
• Output Power at 8Ω
  400 W
• Output Power at 4Ω
  650 W
• Input Sensitivity
  800mV RMS
• Input Impedance
  47,500Ω
• Gain
  36dB
• Signal-to-noise Ratio
  106dB @ full power
• Frequency response (full range)
  10Hz - 125kHz +0/-3dB
• THD (20Hz - 20kHz @ 1 W)
  0.02%
• THD (20Hz - 20kHz @ 400 W)
  0.05%
• Intermodulation distortion
  0.02%
• Shipping weight
  33 lb / 15 kg
• Dimensions (width x height x depth)
  16.9 x 3.5 x 14.0 in
• 42.9 x 8.9 x 35.6 cm