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Bel Canto REF501S Stereo Power Amplifier
Bel Canto REF501S Stereo Power Amplifier - Image 1 of 0
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Bel Canto REF501S Stereo Power Amplifier - Image 1 of 0
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Bel Canto REF501S Stereo Power Amplifier

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Product Code: BEL6000001
REF501S Stereo Amplifier

The REF501S stereo amplifier, solidly built all-aluminum compact chassis, delivers dynamic, accurate hi resolution sound at 250 Watts with incredible speed and control.

Max Power Output 250W @1% THD per Channel
Minimum Load: 2 ohms per Channel
Peak Output Current: 17.5 Amps per Channel
Balanced Input Impedance: 95 Kohms
Voltage Gain 27dB

REF501S Stereo Amplifier Features


Impedance Optimized Input Stage uses selected precision resistors in 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.

DC Signal Path

The REF501S is DC coupled with no coupling capacitor in the signal path. This optimizes the audio signal quality and maximizes both micro and macro dynamic performance. The amplifier will protect itself and your speakers if excess DC is detected with very fast shut-off.

At the Core

High speed ultra-efficient switch mode amplification delivers literally unheard-of levels of performance using an innovative 5th order loop filter. This technology provides extremely low noise and distortion performance over the entire audio bandwidth, allowing the musical message to come through unchanged and with remarkable purity.

Why Class D?

Well-designed Class D switching supplies generally sound more open through the midrange with better Bass control. Note that 250W is 23.9dBw which means that it will drive an 85dB speaker to 108dB with 111dB peaks, theoretically. In a large room with the volume control 10dB below max we’re measuring about 25W of continuous power. This is loud! Most power concerns are more about control rather than how much real power is delivered. This gives further advantage to Class D and switching power supplies as their efficiency is high even at lower power outputs helping them sound ‘bigger’.

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.
REF501S Stereo Amplifier Specifications
REF501S User Guide
Power Output 1% THD: 250W per channel
Minimum Load: 2 ohms per channel
Peak Output Current: 17.5 amperes per channel
Frequency Response: +/-3 dB 0Hz-50KHz, 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
Damping factor: >1000
Output Impedance at 100Hz: <8 milliohms
Dynamic Range: 121dB
Input Voltage for Max Output: 1.4Vrms
Input connections: Single-ended RCA or balanced XLR
RCA input impedance: 47Kohms
Balanced input impedance: 95Kohms
Output connections: 2-sets WBT Nextgen 5-way binding posts
Power On usage: 12W
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: 12 lbs, 5.5 Kg


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