Design Features

•High efficiency Digital Power Processing output stage for cool operation

•Analog signals are processed at small signal level, all large signal power is generated using the switching output stage

•700 watts of continuous power output capability in Balanced Mono mode

•Optimized balanced and single- ended input stage

•THD and IMD <0.05%

•Damping Factor >100

•High thermal stability in all stages

•Regulated, low noise supplies for all analog stages

•Audio Grade decoupling capacitors and resistors used throughout

•Soft clipping insures graceful over load

•High efficiency ‘green’ amplification

•Comprehensive protection circuitry outside the signal path

The eVo Digital Output Stage and Digital Power Processor

The Bel Canto Design eVo digital out- put stage is of unique simplicity. The output uses 2 N channel MOSFET switches switching between the power supply rails. These switches turn on and off within 30 billionths of a second and provide an onresis- tance path to the supplies of a few thousandths of an ohm. These switches switch alternately between the supplies at a rate over 600,000 cycles per second (600 kHz). When no audio signal is present, the ratio between the time at the positive sup- ply and the negative is balanced to provide no audio frequency output. The switching stage is isolated from the loudspeaker by a single LC filter stage. This 80kHz second order filter is used to reject high frequency ener- gy and maintain linear phase response.

Furthermore, the digital power processor adds small levels of high frequency dither to insure that an inherently linear output stage charac- teristic is maintained from very low to very high output levels. The audio frequency information modulates the output stage by changing the time relationship between the positive and negative supply rails. The critical timing information is controlled by the digital power processor and the effective switching frequency is changed over a 200 kHz to 1500 kHz range. This spreads the digital ener- gy created by the amplifier over a wide bandwidth, greatly reducing the energy at any one frequency. This permits using a simple LC filter to remove the high frequency energy and maintains excellent phase response.

© 2002-2004 bel canto design, Ltd.

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eVo User’s Guide 042104

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Bel Canto Design eVo6, eVo4, eVo2 manual Design Features, EVo Digital Output Stage and Digital Power Processor
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eVo2, eVo4, eVo6 specifications

Bel Canto Design is renowned for its commitment to high-performance audio components that merge innovative technologies with refined aesthetics. The eVo series, comprising the eVo4, eVo6, and eVo2, represents the pinnacle of their engineering prowess, delivering superb audio fidelity and versatility for both casual listeners and audiophiles.

The eVo2 is an entry-level model that doesn’t compromise on sound quality. It features a compact yet robust design, allowing it to fit seamlessly into any setup. The eVo2 emphasizes clarity and precision, utilizing Bel Canto’s proprietary digital amplification technology. This model delivers impressive power output, ensuring that dynamic range is preserved even at high volumes. With a minimalist front panel, the eVo2 combines elegance with functionality, and its connectivity options make it easy to integrate into a wide array of systems.

The eVo4 enhances the listening experience further, offering dual-mono architecture that provides improved separation and spatial imaging. This feature ensures that soundstage and instrument placement are well-defined, making it a favorite among serious music enthusiasts. The eVo4 also incorporates advanced DSP (digital signal processing) capabilities, enabling users to customize their listening experience to their preference. Its robust power supply ensures consistent performance, while its meticulous engineering minimizes distortion, resulting in an audio experience that is both rich and immersive.

At the top of the line, the eVo6 embodies the pinnacle of Bel Canto's innovation. It integrates all the features of the lower models but takes it a step further with cutting-edge Class D amplification and fully balanced signal paths. The eVo6 showcases impressive power handling capabilities and thermal efficiency, making it suitable for driving demanding speakers with ease. It also boasts advanced connectivity options, including network streaming capabilities, ensuring that the eVo6 can adapt to evolving audio sources and formats. Together with the brand’s signature high-frequency response, crisp mids, and a deep bass foundation, the eVo6 delivers a captivating listening experience that appeals to the most discerning listeners.

Each model in the eVo series reflects Bel Canto's commitment to excellence, characterized by quality construction, innovative technology, and user-friendly design. Whether choosing the eVo2, eVo4, or eVo6, audiophiles can expect exceptional performance and an unparalleled listening experience tailored to their unique preferences.
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