Accuphase E-550

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The Accuphase E-550 is a high-end integrated amplifier manufactured by the Japanese audio company, Accuphase. It is part of the brand's Reference Class line-up, which is known for its exceptional sound quality, precise craftsmanship, and innovative design.The E-550 features a full complement of inputs, including balanced and unbalanced XLR, RCA, and digital inputs (USB, AES/EBU, and S/PDIF). It also has a headphone amplifier with its dedicated socket and level control. The amplifier is rated at 150 watts per channel into 8 ohms and 300 watts per channel into 4 ohms.One of the standout features of the E-550 is its use of top-grade components, including the company's proprietary NJW (Neutralizer Jewel Weighted) potentiators, high-quality audio-grade capacitors, and high-transconductance MOSFETs. These components contribute to the amplifier's ultra-low noise, high current capabilities, and precise musical reproduction.The E-550 employs a multi-stage cascading voltage amplifier circuit and a multi-stage current-feedback amplifier circuit, which results in a high degree of dynamic range, a low noise floor, and a smooth and natural sound reproduction.The amplifier's elegant design and build quality, including the masterfully crafted circuit layout and solid aluminum front panel, are a testimony to Accuphase's uncompromising approach and professional-grade audio engineering.Overall, the Accuphase E-550 is a premium integrated amplifier that delivers exceptional audiophile-grade sound quality, user-friendly features, and sleek design, making it an ideal choice for discerning music lovers seeking the very best in audio performance.