Pre-Owned MOON 400M Mono Power Amplifiers (Pair)
These pre-owned mono power amplifiers are in excellent sonic and aesthetic condition. The now discontinued but iconic 400M mono block duo is known for being able to achieve a really nice punchy presentation, whilst maintaining MOON's signature neutrality. These black units come with all original accessories and packaging, and are one very trusted owner from new. The unit has been serviced and fully recapped by our service department.
The MOON 400M was a differential mono power amplifier that produced 400 watts into 8 ohms and 650 Watts into 4 ohms. Based on our highly acclaimed Advanced Renaissance amplifier circuitry, the class A/AB, zero global feedback, DC-coupled 400M was 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 could effortlessly drive any loudspeaker. Even difficult loads didn't impede its ability to remain exceedingly musical and accurate.
Our own unique heat-sink geometry allowed for ultra-effective and efficient cooling. The amplifier's oversized power supply contained a large proprietary toroidal transformer and substantial energy storage. Finally, with both balanced (XLR) and single-ended (RCA) inputs, the MOON 400M represented the ultimate choice for performance and affordability.
Technical aspects:
- 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.
