Simaudio MOON 641 North Collection integrated amplifier

Simaudio MOON 641 North Collection Integrated Amplifier

The MOON 641 is the true heart of any audio system – combining a preamplifier and power amplifier in a single unit. This exciting entry point to the North Collection is a superb integrated amplifier, showcasing MOON's premium engineering and the latest in audio technology at its best.

The Centerpiece

The MOON 641 combines a preamplifier and power amplifier in one chassis, based on a dual-mono design. It delivers 125 W / 8 Ω and 250 W / 4 Ω. The MDCA circuit operates outside the signal path, reducing distortion without global feedback, while M-VOL3 provides precise and stable volume control even at low levels. A damping factor of 700, an SNR of 109 dB, and a frequency response of 2 Hz–90 kHz (+0/–3 dB) ensure precise control for a wide variety of speakers. The 4.3" color display simplifies daily use and settings management. Designed and assembled in Quebec, the 641 naturally positions itself as the centerpiece of a modern home audio system.

Comprehensive

The MOON 641 relies on a meticulous internal structure and vertical cooling fins, ensuring excellent thermal and mechanical stability. Ease of use is enhanced by a 4.3" color display, clear local controls, and MOONLink connectivity, which allows the device to operate effortlessly with other North Collection components. Standby modes also include a low-power mode (2.5 W) for everyday use. The rear panel features line-level inputs, a line output, and clearly structured speaker terminals for neat cabling. The included BRM-1 intelligent remote control enables direct and intuitive control. Whether the 641 is used alone or combined with a separate source, such as the MOON 681, it provides a clear, reliable user experience that seamlessly fits the North Collection design language.

Performance

At the core of the MOON 641, the combination of MDCA and M-VOL3 technologies sets it apart. MDCA reduces noise and distortion, while M-VOL3 ensures excellent channel balance and subtle volume control. The dual-mono topology and robust power supply maintain signal integrity from inputs to speaker terminals. Published performance values—0.003% THD+N @ 125 W and –109 dB channel crosstalk—verify stable performance at real listening levels. The 4.3" display simplifies settings management. For digital playback and streaming, the MOON 681 is a natural partner, working seamlessly with the 641 via MOONLink. The result is precise, durable performance that faithfully reflects the North Collection identity.

• MDCA – MOON Distortion-Cancelling Amplifier
  Advanced MDCA technology that reduces distortion without affecting the actual signal path.
• MOON Transistors - MOON's own precisely matched transistors, ensuring excellent performance and reliability.
• Dual Mono Configuration - Isolated left and right channels with separate power supplies for optimal channel separation, dynamics, and stability.
• M-VOL3 – 3rd Generation Electronic Volume Control - Enhanced gain control that provides precise, stable, and quiet volume management.
• MOONLink - An intelligent control system between MOON devices, facilitating joint use and synchronization.
• 4.3" LCD Color Graphics Display - A clear and modern display that simplifies daily use and settings management.

Specifications

• Output Power (stereo, 8 Ω) 125 W
• Output Power (stereo, 4 Ω) 250 W
• Input Sensitivity 300 mV – 6 V
• Input Impedance 22 kΩ
• Gain 40 dB
• Frequency Response 2 Hz – 90 kHz (+0 dB / –3 dB)
• Crosstalk –109 dB
• Signal-to-Noise Ratio 109 dB
• Total Harmonic Distortion + Noise (THD+N @ 1 W) 0.008 %
• Total Harmonic Distortion + Noise (THD+N @ 125 W) 0.003 %
• Intermodulation Distortion 0.06 %
• Damping factor 700
• Power Consumption (Idle) 38 W
• Power Consumption (Full Power Standby) 37 W
• Power Consumption (Low Power Standby) 2.5 W
• Shipping Weight 26 kg
• Dimensions (W × H × D) 48.1 × 10.2 × 46.5 cm