Simaudio MOON 850P preamplifier
The ultimate analog preamplifier
"It's the most transparent preamp - or audio component of any sort - that I've heard." —Brian Damkroger, Stereophile
"This is a rare component in the way it disappears, Revealing nothing but the music carried through it. I've yet to hear one that reveals more music." – Jeff Dorgay, TONEAudio
Elegantly designed, uncompromisingly finished and technically advanced – this is the pinnacle of analog preamplifiers. It offers a completely clean signal path, extremely low noise levels and exceptionally accurate channel balance, bringing out the finest details in your music.
Its dynamic range, natural tonality and three-dimensional accuracy of the sound image make it the perfect core for a high-end hi-fi system.
Two separate housings – ultimate signal purity
This advanced two-piece design completely separates the audio circuitry into its own housing, minimizing electrical interference, reducing the effects of vibration, and improving signal integrity.
The result is a more accurate, purer and more natural sound – exactly what the most demanding listener expects from a high-end analog preamplifier.
Suspension structure for natural, vivid sound
Advanced suspension technology isolates sensitive audio components from mechanical vibrations and other microphonic interference. This near-perfect attenuation reduces signal distortion and allows the sound to be released naturally, openly, and exceptionally vividly.
The end result is a soundscape that feels breathy and authentic – as if you were in the middle of the original performance.
- Dual-body design: one body contains the power supply, digital control electronics, software processing and LED display. The other body is dedicated solely to the audio circuitry, ensuring complete signal separation and purity.
- i²DCf (Independent Inductive DC Filtering): Each IC component in the audio circuit's signal path has its own inductor - a total of 40 separate filtering levels. This provides exceptionally clean and stable operating voltage.
- Adjustable gain balance: Each line input has a ±10 dB gain offset adjustment, making it easy to fine-tune and balance your system.
- Home theater ready: each line input can be configured to be “home theater ready,” bypassing the 850P’s own volume control and allowing the signal to pass through completely undisturbed as part of a multi-channel system.
Specifications
- Inputs – XLR / RCA: 3 pairs / 5 pairs
- Input sensitivity: 200 mV – 4.0 V RMS
- Input impedance: 11,000 Ω
- Gain: 9 dB
- Outputs – XLR / RCA: 2 pairs / 2 pairs (fixed + adjustable)
- Signal-to-noise ratio (20 Hz – 20 kHz): 130 dB at maximum output
- Frequency response: 5 Hz – 100 kHz ±0.1 dB
- Channel separation @ 1 kHz: –130 dB
- Output impedance: 50 Ω
- THD (20 Hz - 20 kHz): 0.0005%
- Intermodulation distortion: 0.0001%
- Shipping weight: 151 lb / 67 kg
- Dimensions – each frame (W × H × D): 47.6 × 10.2 × 41.9 cm