Yamaha A-S501 Integrated Amp

Description

The Yamaha A-S501 is a classic two-channel integrated amplifier that exemplifies the company’s long-standing “Natural Sound” philosophy. Positioned in the middle of Yamaha’s highly respected A-S lineup, the A-S501 combines robust analog amplification with modern digital connectivity, making it an ideal centerpiece for vinyl enthusiasts, CD collectors, and listeners who also want to connect a television or digital streamer. Delivering 85 watts per channel into 8 ohms, the amplifier offers ample power for a wide variety of bookshelf and floorstanding loudspeakers while maintaining the warm, dynamic, and engaging sound quality for which Yamaha has become known.

At the heart of the A-S501 is Yamaha’s ToP-ART (Total Purity Audio Reproduction Technology) architecture. This design employs a symmetrical left/right signal layout, short signal paths, a rigid ART (Anti-Resonance and Tough) chassis, a custom power transformer, oversized 12,000 µF filter capacitors, and carefully selected audio components to minimize distortion and vibration. The result is a remarkably quiet background and a presentation that emphasizes clarity, musicality, and precise stereo imaging. The amplifier also features Yamaha’s Pure Direct mode, bypassing tone, balance, and loudness circuits for the shortest possible signal path and maximum sonic transparency.

Unlike many traditional integrated amplifiers in its price class, the A-S501 includes a built-in 24-bit DAC with both optical and coaxial digital inputs. This allows users to connect a television, CD transport, or streaming device directly to the amplifier without requiring an external DAC. Analog listeners are equally well served, thanks to a high-quality moving-magnet phono stage and multiple line-level inputs. Yamaha’s continuously variable loudness control—one of the company’s signature features—lets listeners maintain proper tonal balance during low-volume listening without the exaggerated bass boost common to conventional loudness circuits.

The A-S501 has earned widespread praise for its combination of performance and value. What Hi-Fi? described it as delivering “powerful, punchy and entertaining sound,” noting its impressive dynamics, confident bass performance, and ability to remain composed even during demanding musical passages. The publication also praised its excellent connectivity and overall value for money.

Owners have echoed these impressions over the years. One long-term HiFi Engine reviewer described the amplifier as “a very open and clear amp” with “plenty of power, but in the right places,” adding that it features an “excellent phono-stage and lots of inputs.” Another reviewer praised its improved bass authority and called it “a great value.”

Build quality is another standout feature. The brushed aluminum front panel, substantial control knobs, gold-plated speaker terminals, and solid mechanical construction give the A-S501 the feel of a significantly more expensive component. Despite offering modern conveniences such as digital inputs and subwoofer output, it retains the straightforward operation and timeless appearance of traditional hi-fi amplifiers.

Years after its introduction, the Yamaha A-S501 remains one of the strongest values in mid-priced stereo electronics. Its combination of clean, high-current amplification, excellent phono stage, integrated DAC, flexible connectivity, and proven reliability make it an outstanding choice for anyone assembling a high-quality two-channel music system without unnecessary complexity.

Product Specifications

• Amplifier Type: Stereo integrated amplifier
• Power Output: 85 watts per channel into 8Ω (20 Hz–20 kHz, 0.019% THD)
• Dynamic Power: 130W (8Ω), 150W (6Ω), 185W (4Ω), 220W (2Ω)
• Amplifier Design: ToP-ART (Total Purity Audio Reproduction Technology)
• Frequency Response: 10 Hz–100 kHz (±1 dB)
• Total Harmonic Distortion: 0.019%
• Damping Factor: 240
• Digital Inputs: 1 Optical, 1 Coaxial
• DAC: Built-in 24-bit digital-to-analog converter
• Analog Inputs: Moving Magnet phono plus multiple line-level inputs
• Outputs: Record out, subwoofer out, headphone output
• Speaker Outputs: A/B speaker switching with gold-plated binding posts
• Special Features: Pure Direct mode, continuously variable loudness control, tone controls, Auto Power Standby
• Dimensions (W × H × D): 17.1 × 6.0 × 15.2 in. (435 × 151 × 387 mm)
• Weight: 22.7 lbs. (10.3 kg)