MOON 641 Integrated Amplifier (North Collection)

The MOON 641 Integrated Amplifier is built to be the true centerpiece of a high-performance hi-fi system—combining a dedicated preamplifier and a powerful dual-mono amplifier stage in one beautifully engineered chassis. Rated at 125 W per channel into 8Ω and 250 W per channel into 4Ω, it delivers effortless dynamics, confident speaker control, and clean musical authority even with demanding loudspeakers.

At the heart of its performance are MOON’s advanced circuit technologies, including MDCA (MOON Distortion-Cancelling Amplifier) to reduce distortion without relying on global feedback, and M-VOL3 for highly precise electronic gain control with stable channel tracking—especially valuable for low-level listening. A 4.3" LCD color graphic display makes daily use intuitive, while thoughtful connectivity—including multiple analog inputs, configurable line output, MOONLink, and Ethernet networking—helps the 641 integrate cleanly into modern systems. Designed and assembled in Québec, the 641 delivers premium build quality, refined usability, and the kind of tonal grip and composure that elevates every source you connect. The MOON 641 is part of ListenUp's MOON Integrated Amplifier Collection.

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What It's Good At:

• Driving demanding speakers with authority (125W/8Ω, 250W/4Ω dual-mono power)
• Delivering low-distortion, high-control sound via MDCA distortion-cancelling amplification
• Precise, smooth volume control and excellent channel balance with M-VOL3 gain control
• Revealing fine detail and dynamics with wide bandwidth (2 Hz–90 kHz) and strong SNR (109 dB)
• System integration and coordination through MOONLink, Ethernet networking, and 12V trigger output
• Easy daily operation with a large 4.3" color display, included BRM-1 intelligent remote, and flexible standby modes

MOON 641 Full Specifications:

• Product Type: Integrated Amplifier (preamplifier + power amplifier in one chassis)
• Amplifier Topology / Configuration: Dual Mono Configuration
• Amplifier Technologies / Design Features:
  • MDCA – MOON Distortion-Cancelling Amplifier
  • MOON Transistors
  • M-VOL3 – 3rd Generation Improved Electronic Gain Control
  • MOONLink
  • 4.3’’ LCD Color Graphic Display
• 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 (@ 1 W): 0.008%
• Total Harmonic Distortion + Noise (@ 125 W): 0.003%
• Intermodulation Distortion: 0.06%
• Damping Factor: 700
• Power Consumption (Idle): 38 W
• Power Consumption (Standby / Full Power Standby): 37 W
• Power Consumption (Low Power Standby): 2.5 W
• Dimensions (W x H x D): 18.95 x 4.03 x 18.32 in (48.1 x 10.2 x 46.5 cm)
• Dimensions (L x H x D format): 48.1 cm x 10.2 cm x 46.5 cm / 18.95” x 4.03” x 18.32”
• Shipping Weight: 57.5 lbs / 26 kg
• Fuse (120 V / 240): F 6A H 250V 3AG / F 4A H 250V 3AG
• Rear Panel Audio Connections:
  • A1 – A4: Single-ended (RCA) inputs for unbalanced line-level analog sources
  • Balanced: Differential (XLR) inputs for balanced line-level analog sources
  • Line Out: Individually configurable output types
    • Variable: For use as a preamplifier to power amps, subwoofers, active speakers
    • Fixed: For devices with their own volume control (e.g., headphone amplifiers)
  • Speaker Outputs (+/–): Binding posts for banana plugs, spades, and bare wire
• Rear Panel Functional Connections:
  • 12V Trigger Out: Mini-jack (TS) for standby synchronization
  • Network (RJ-45): Ethernet connections (MOONLink, network extension, or router connection)
• In the Box (Accessories):
  • Owner’s manual / User manual
  • Quick Start Guides (2)
  • AC power cable / Power cable
  • BRM-1 intelligent remote control (MOON BRM-1 Remote Control)
  • 1 spare fast-blow fuse
  • MOONLink (as supplied)
  • Ethernet cable
  • USB cable
  • Warranty and product registration information / Warranty registration card (Canada & USA only)

MOON 641 Q&A:

How much power does the MOON 641 deliver per channel?

The MOON 641 is rated at 125 watts per channel into 8Ω and 250 watts per channel into 4Ω, giving it the current and control needed for demanding loudspeakers.

What makes the MOON 641 different from typical integrated amplifiers?

It combines a true dual-mono layout with MDCA distortion-cancelling amplification and M-VOL3 precision gain control to deliver low distortion, stable channel balance, and confident speaker grip without relying on global feedback.

What inputs does the MOON 641 provide for analog sources?

It includes four single-ended RCA line inputs (A1–A4) plus balanced XLR input connections for compatible sources.

Does the MOON 641 have a preamp output for a subwoofer or external amplifier?

Yes. It includes a configurable Line Out that can be set to Variable (ideal for subwoofers, power amps, or active speakers) or Fixed (ideal for devices with their own volume control).

Can the MOON 641 coordinate power and control with other MOON components?

Yes. It supports MOONLink and includes Ethernet (RJ-45) networking plus a 12V trigger output to help synchronize standby behavior and system operation.

Is the MOON 641 easy to operate day-to-day?

Very. A large 4.3" color display provides clear feedback and menu access, and the included BRM-1 intelligent remote adds convenient control from the listening position.

What standby and efficiency options are available?

The MOON 641 supports multiple standby behaviors, including a low-power standby mode rated at 2.5W for everyday convenience.

What speaker connections are supported?

The binding posts accept banana plugs, spades, and bare wire, making it easy to use a wide range of speaker cables securely.

MOON 641 Downloads:

MOON 641 Manual

MOON North Collection Video: