Simaudio Moon North Collection Power Amplifier - 861
Absolute command of the signal path a soundstage of unwavering stability
The MOON 861 is a power amplifier with the pedigree of the distinguished MOON 888 and the wholistic design philosophy of the North Collection.
Embodied Power
The MOON 861 is a stereo power amplifier built to reproduce music with calm authority. Its dual-mono layout delivers 300 W per channel into 8 ohms and 600 W into 4 ohms, with generous headroom via MDCA architecture. Distortion remains below 0.001% even at full power, and the high damping factor ensures fast, uncompressed response. Designed as the final link in a high-resolution system, the 861 maintains absolute stability, free from emphasis, even in the most complex configurations.
Architecture & Headroom
Equipped with two 900 VA custom low-noise toroidal transformers and 240,000 µF of power supply capacitance, the MOON 861 delivers dynamic peaks with ease. Analog circuits are physically separated, magnetic shielding is reinforced, and internal layout minimizes capacitive coupling. Side-mounted heatsinks ensure consistent thermal dissipation. The overall design removes structural constraints, leaving only the signal, in its purest form.
Integration & Consistency
The rear panel includes RCA and XLR inputs, a stereo/mono selector, and a MOONLink port for seamless startup coordination with MOON preamplifiers. Standby consumption is reduced to 1.25 W, with a full-power idle mode for immediate responsiveness. The 861 is built to disappear behind the music, with no added coloration or variation. It pairs naturally with the 891 and any setup requiring headroom, stability, and silence.
Design features
- MDCA – MOON Distortion-Cancelling Amplifier
- No Global Feedback Design
- MOON Transistors
- Dual Mono Configuration
- Monaural Mode Toggle Switch
- MOONLink
- Multicolour LED Indicator
In the box
- The following accessories should be included inside the box with your power amplifier:
- Owner’s manual
- AC power cable
- 1 spare fast-blow fuse
- MOONLink
- Warranty and product registration information (USA and Canada only)
| Features | |
|---|---|
| Output Power (Stereo 8 Ω) | 300 W |
| Output Power (Stereo 4 Ω) | 600 W |
| Output Power (Mono 8 Ω) | 800 W |
| Input Sensitivity | 1.4 V |
| Input Impedance | 47 kΩ |
| Gain | 31 dB |
| Frequency Response | 2 Hz – 100 kHz (+0 dB / –3 dB) |
| Crosstalk | –119 dB |
| Signal-to-Noise Ratio | 119 dB |
| Total Harmonic Distortion + Noise (@ 1 W) | 0.002 % |
| Total Harmonic Distortion + Noise (@ 300 W) | 0.001% |
| Intermodulation Distortion | 0.002% |
| Damping Factor | 900 |
| Power Consumption (Idle) | 85 W |
| Power Consumption (Full Power Standby) | 75 W |
| Power Consumption (Low Power Standby) | 1.25 W |
| Shipping Weight | 155 lbs / 70 kg |
| Dimensions (width x height x depth) | 18.95 x 8.26 x 24 in 48.1 x 21 x 60.9 cm |