CNET, Steve Guttenberg, Aug 2010: "For such a little thing (8.5 by 3.5 by 12 inches), the REF500S is seriously powerful, it can deliver 250 watts into 8 ohm speakers; 500 watts into 4-ohm-rated speakers. … Top-quality parts including Caddock resistors, special ultra-low ESR decoupling capacitors, and low-noise regulated power supplies. That's all on the inside; I think the amp looks really cool. … The REF500S sounds stellar on my Magnepan MG 3.6/R speakers, which are one of the toughest speakers to drive well." More From Bel Canto:The REF500S stereo amplifier has incredible power per square inch with two independent mono boards in a single chassis. Independent power supplies and isolated input signal filter technology reduces high power amplifier energy for a cleaner, transparent power. 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.WBT NextGen Speaker ConnectorsThe 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. Click here for a PDF copy of the Bel Canto REF500s User Guide Click here to see our other Bel Canto items listed for sale REF500S Stereo Amplifier Specifications:Maximum Power Output: 500W 4 ohms, 250W 8 ohms per channelPower Output 1% THD: 400W 4 ohms, 200W 8 ohms per channelMinimum Load: 2 ohms per channelPeak Output Current: 35 amperes per channelFrequency Response: +/-3 dB 1.5Hz-70KHz, all loadsTHD+N: 0.003% 1W, 1KHz, 4 ohmsIMD (CCIF): 0.0003%, 1W, 14:15KHz, 4 ohmsOutput noise: 35uVRMS A-weighted 10Hz-20KHzVoltage gain: 27dB (single ended or balanced input)Damping factor: >1000Output Impedance at 100Hz:
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