Bel Canto e.One REF501S Power Amplifier

Bel Canto e.One REF501S Power Amplifier

The Bel Canto e.One REF501S Power Amplifier is available for demonstration in our Hull store by request.

Engineered within a sleek, solid aluminum chassis, the REF501S delivers 250 watts per channel of clean, dynamic power with breathtaking accuracy and speed. It’s designed for audiophiles who demand high-resolution sound, refined musical detail, and total control over their speakers.

Precision Engineering for Audiophile Performance

At its core, the Bel Canto REF501S uses a high-speed, ultra-efficient Class D amplification stage optimized with a proprietary 5th-order loop filter. This design achieves exceptionally low noise and distortion across the full audio bandwidth, ensuring your music is reproduced with absolute purity and clarity.

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

With this level of control and responsiveness, the REF501S easily drives even demanding speakers, delivering deep, articulate bass and an open, holographic midrange.

DC-Coupled Signal Path for Maximum Transparency

Unlike conventional amplifiers, the Bel Canto e.One REF501S is DC coupled, eliminating coupling capacitors in the signal path. This design choice preserves the natural integrity of the audio signal, enhancing both microdynamics and macrodynamics. If excess DC is detected, an advanced protection circuit instantly shuts down the amplifier — safeguarding both the unit and your speakers.

Class D Power: Efficiency Without Compromise

Bel Canto’s refined Class D topology brings together speed, efficiency, and precision. It produces an open, effortless sound with exceptional control over the low end. Even at lower volumes, the REF501S maintains remarkable efficiency, delivering big, room-filling sound without sacrificing refinement or tonal balance. The result is a power amplifier that sounds lively and musical, yet utterly controlled, no matter what you’re listening to.

WBT NextGen Speaker Connectors — The Perfect Signal Path

Every connection counts. That’s why the REF501S uses WBT NextGen speaker terminals, known for their low contact resistance and minimal sonic coloration. These connectors ensure an open, grain-free presentation throughout the audio spectrum, preserving the amplifier’s purity of tone.

Compact Design, Reference-Class Performance

Encased in an all-aluminum chassis, the e.One REF501S blends modern industrial design with functional durability. Its compact form factor makes it ideal for both minimalist desktop setups and full-scale home audio systems. Despite its size, this amplifier delivers the authority and precision of much larger power amps.

Why Choose the Bel Canto e.One REF501S?

The Bel Canto e.One REF501S Power Amplifier is built for serious listeners who value musical truth, transparency, and control. Whether paired with high-sensitivity speakers or complex loads, it delivers performance that competes with far larger and more expensive amplifiers. With Bel Canto’s proven engineering and minimalist aesthetic, the REF501S embodies the future of audiophile-grade Class D amplification.

Key Highlights

250W per channel of ultra-clean power
Fully balanced, impedance-optimized input stage
Class D topology with 5th-order loop filter for low distortion
DC-coupled signal path for uncolored sound
WBT NextGen connectors for pure signal transfer
Compact, elegant aluminum chassis

Bel Canto e.One REF501S Power Amplifier Specification:

• THD+N: 0.003% @ 1W, 1KHz, 4 ohms
• IMD (CCIF): 0.0003%, 1W, 14:15KHz, 4 ohms
• Frequency Response: +/-3 dB 0Hz–50KHz, all loads
• Dynamic Range: 121dB
• Output Noise: 35uVRMS A-weighted 10Hz–20KHz
• Damping Factor: >1000
• Output Impedance at 100Hz: <8 milliohms
• Power Output (1% THD): 250W per channel
• Peak Output Current: 17.5 amperes per channel
• Minimum Load: 2 ohms per channel
• Voltage Gain: 27dB
• Input Voltage for Max Output: 1.4Vrms
• Input Connections: Single-ended RCA or balanced XLR
• Balanced Input Impedance: 95Kohms
• RCA Input Impedance: 47Kohms
• Output Connections: 2 sets WBT Nextgen 5-way binding posts
• Internally Set Operating Voltages: 100–120VAC or 230–240VAC 50/60Hz
• Power On Usage: 12W
• Power Off Usage: 0.0W
• Size: 8.5 x 3.5 x 12 [in], 216 x 88 x 305 [mm] (WxHxD)
• Weight: 12 lbs, 5.5 kg
• REF501S User Guide