• Intro

    REF500M Monoblock Amplifier

    The REF500M monoblock amplifier has excellent power combined with upper midrange and high frequency clarity and openness that lets the subtle detail from your source component pass through to your speakers.

    • Max Power Output: 500W 4 ohms, 250W 8 ohms per Channel
    • Minimum Load: 3 ohms per Channel
    • Peak Output Current: 35 Amps
    • Balanced Input Impedance: 200 Kohms

  • Features

    REF500M Monoblock Amplifier Features


    The Bel Canto Impedance Optimized Input Stage is a balanced high Common Mode Rejection, low output impedance driver that is critical to the amplifier's performance, ensuring that the refined dynamic qualities of the recording are preserved.

    Custom Power Input AC/DC Filter and Energy Storage
    Our custom AC/DC input filter and energy storage stage to allows the amp module to operate in a better controlled environment, providing lower noise operation and better dynamic signal handling, making the amplifier sound ‘bigger’ and conveying dynamic nuance more accurately.

    WBT NextGen Speaker Connectors
    The WBT NextGen connectors provide the best possible connection from the amplifier to the speaker cables. We choose them because they impart minimal sonic signature to the sound, remaining open and grain-free up throughout the audio frequency band.

  • Specs

    REF500M Monoblock Amplifier Specifications


    Maximum Power Output: 500W 4 ohms, 250W 8 ohms
    Power Output 1% THD: 450W 4 ohms, 225W 8 ohms
    Minimum Load: 3 ohms
    Peak Output Current: 35 amperes
    Frequency Response: +/-3 dB 1.5Hz-70KHz, all loads
    THD+N: 0.003% 1W, 1KHz, 4 ohms
    IMD (CCIF): 0.0003%, 1W, 14:15KHz, 4 ohms
    Output noise: 35uVRMS A-weighted 10Hz-20KHz
    Voltage gain: 27dB (single ended or balanced input)
    Damping factor: >1000
    Output Impedance at 100Hz: <8 milliohms
    Dynamic Range: 121dB
    Input Voltage for Max Output: 2Vrms
    Input connections: Single-ended RCA or balanced XLR
    RCA input impedance: 100Kohms
    Balanced input impedance: 200Kohms
    Output connections: 1-set WBT Nextgen 5-way binding posts
    Power On usage: 10W
    Power Off usage: 0.0W
    Internally Set Operating Voltages: 100-120VAC or 230-240VAC 50/60 Hz
    Size: 8.5 x 3.5 x 12[inches], 216 x 88 x 305[mm] (WxHxD)
    Weight: 15 lbs, 7 Kg

    Features and specifications are subject to improvements and changes without prior notice.

  • Reviews

    REF500M Monoblock Amplifier Reviews

    Positive Feedback, Audio Discourse, Jan-Feb 2011

    "While you may come for the power of the REF500M monoblocks, you will stay for the musicality … Considerably sweeter than their predecessors … more open and transparent, with greater clarity and control (particularly of the bass) … A more relaxed presentation (particularly on the top end), and really remarkable rhythm and pacing. … I experienced all audio events as occurring in real time; in the here and now ... ample power reserves track the leading edge of transients, as well as the rise and fall of dynamics with incredible accuracy, timing and presence … with a focused, convincing soundstage. Musically, you want for so little, it's hard to imagine wanting anything more."
    SoundStage, Dan Davis, April 2010

    "My extended time with the Bel Canto e.One REF500Ms put to rest all doubts or misconceptions I’d had about class-D switching amplifiers -- they could play with the big amps of any class. The REF500Ms displayed excellent transients and dynamics, legitimate high-end microdynamics, and good depth and soundstaging, among their other attributes. And for Manhattan apartment dwellers and others with limited space, their small size is a huge asset. The e.One REF500M represents good value for what, these days, is a reasonable price in highend audio. It’s hard to go wrong with these beauties; they prove that small can be beautiful, even in the high end."
    Positive Feedback, Guido Corona, July-Aug 2010

    "The Bel Canto REF500Ms are far from being mere raw 125ASX2 modules hidden inside handsome boxes. Like the power conversion components imbedded in so many advanced amplifiers based on other underlying technologies, the ICEpower 125ASX2s are but central building blocks of a comprehensive design, optimized to yield astonishingly high musical performance. … Harmonic exposure, development, and congruence is wholly convincing … Give the Bel Canto REF500Ms a long audition: you will be amazed by their surprising authority, seduced by their agility, and will fall in love with their superior musicality."
    Digital Trends, Adam Milgrom, April 2009

    "Green has become the new buzzword for socially-conscious living. In this area, audiophiles have been woefully behind the curve with cabinets full of energy-sucking electronics. Bel Canto REF500M amplifiers give you great sound AND sips lightly from the energy stream. My last class A power amplifier regularly pulled an extra $30 per month from my wallet. By contrast even when left on 24/7 the REF500Ms drew less than $30 of juice in an entire year! You can hear all the wonders of Miles Davis’ ‘Kind of Blue’ while staying completely green. In short, welcome to the new electronic millennium!"