Vocals and cymbals float

The MOON 330A Power Amplifier represents not only an amazing value, but also amazing sound, period. It delivers a tight, extended and superbly authorative bass with power, weight and articulation. Vocals and cymbals float in a musical space filled with the air and natural ambience of a musical performance. When mated with the 350P Preamplifier, the combination provides a musical performance so complete and satisfying that one wonders if it can get any better.

famous and respected

Technically, the 330A is the stereo version of the flagship 400M Monoblock Amplifiers. Like all MOON products, the 330A Power Amplifier is built to the highest standards of materials, quality control, reliability and performance that has made MOON products so famous and respected around the world.

Design features
  • 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 5 watts for greater efficiency.
  • Optimized selection of very high quality electronic components.


  • Output Power at 8Ω
    125 W per channel
  • Output Power at 4Ω
    250 W per channel
  • Output Power – Bridged mono at 8Ω
    400 W
  • Input Sensitivity
    800mV RMS
  • Input Impedance
  • Gain
  • Signal-to-noise Ratio
    100dB @ full power
  • Frequency response (full range)
    10Hz – 125kHz +0/-3dB
  • THD (20Hz – 20kHz @ 1 W)
  • THD (20Hz – 20kHz @ 125 W)
  • Intermodulation distortion
  • Shipping weight
    33 lb / 15 kg
  • Dimensions (width x height x depth)





Magnificent and palatial soundstages, coupled with neutrality, made the Simaudio Moon 330A’s sound in my system wonderful to behold. Its combination of high-quality electronic parts, high precision of construction, manufacturer reputation, ten-year warranty, sexy looks — and, most important, its beautiful reproduction of every recording I played through it, regardless of musical genre, pace, or playback volume — easily exceeded all of my needs.

When the Moon 330A arrived, I wondered if it would impress me as much as had the Moon Neo 350P. It did — and more.