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Yamaha A-S501 Integrated Amplifier at Vinyl Sound Toronto Canada

The A-S501 is a stereo integrated amplifier from Yamaha (Hamamatsu, Japan), available at Vinyl Sound in Toronto, Canada. Built on Yamaha's ToP-ART (Total Purity Audio Reproduction Technology) design philosophy, this amplifier delivers 85W per channel RMS (8 ohms, 20Hz-20kHz) with a damping factor of 240, a signal-to-noise ratio of 99dB, and total harmonic distortion of just 0.019%. Grounded in Yamaha's Natural Sound concept and more than 125 years of musical instrument craftsmanship, the A-S501 combines a fully symmetrical signal path, high-grade internal components, digital audio inputs, and an aluminium hairline-finish front panel into a compact, elegant HiFi package suited to both analogue and digital sources.

ToP-ART: Yamaha's Total Purity Audio Reproduction Technology

ToP-ART is the core design philosophy behind the A-S501, encompassing every aspect of signal path layout, component selection, and chassis construction. The I/O Direct Symmetrical Design arranges the left and right audio channels in a straight, mirrored layout from input to output, minimising the distance the signal must travel and reducing susceptibility to noise and distortion. The ART (Anti-Resonance and Tough) Base bottom chassis incorporates a solid centre bar that provides high-rigidity support and mechanical vibration damping, preventing chassis resonance from colouring the audio signal. Together, these design principles give the A-S501 a level of circuit integrity uncommon at its position in the amplifier market.

High-Quality Internal Components

The A-S501 is built with a custom-made power transformer, custom-made 12,000uF block capacitors, two direct signal path speaker relays, aluminium-extruded heat sinks, and a one-point grounding system. Gold-plated speaker terminals, gold-plated RCA terminals on the CD and phono inputs, and a gold-plated coaxial terminal ensure low-resistance, corrosion-free connections throughout. Every component in the signal path has been individually selected and tested by Yamaha's engineering team to maintain the integrity of the Natural Sound design objective.

Key Features

• ToP-ART with I/O Direct Symmetrical Design: Fully symmetrical left-right channel layout from input to output minimises signal path length and noise, delivering exceptional channel separation and tonal accuracy.
• ART Base Chassis: Anti-Resonance and Tough bottom chassis with solid centre bar eliminates mechanical vibration that can degrade audio performance.
• 85W x 2 RMS Output Power: Rated at 85W per channel into 8 ohms (20Hz-20kHz, 0.019% THD), with high dynamic power headroom of up to 220W per channel into 2 ohms for demanding speaker loads.
• Pure Direct Mode: Bypasses the buffer amplifier, tone controls, loudness, and balance circuits entirely, routing the signal through the shortest possible path for maximum signal purity.
• Continuously Variable Loudness Control: An analogue front-panel loudness control using electronic volume allows independent adjustment of low and high frequency balance at any listening level, compensating for the ear's natural roll-off at low volumes.
• Digital Audio Inputs: Both optical and coaxial digital inputs are provided, allowing direct connection of a TV (optical) or Blu-ray player (coaxial) while keeping the signal in the digital domain for pristine audio quality.
• Phono MM Input: A dedicated moving-magnet phono stage allows direct connection of a turntable for vinyl playback without an external phono preamplifier.
• Subwoofer Output: A dedicated subwoofer terminal allows integration of a powered subwoofer for extended bass performance.
• Speaker A/B and A+B Selection: Four speaker terminals allow connection of two separate speaker systems, switchable individually or simultaneously for multi-room flexibility.
• Gold-Plated Terminals: Speaker, RCA, and coaxial terminals are all gold-plated to prevent oxidation and ensure long-term connection integrity.
• Aluminium Front Panel and Knobs: A silver hairline-finish aluminium front panel and luxury-grade control knobs matching Yamaha's top-end HiFi models give the A-S501 a refined, premium appearance.
• Remote Control: Included remote with hairline finish allows volume, input selection, and basic Yamaha CD player control from the listening position.
• Auto Power Standby: Automatically enters standby mode after approximately 8 hours of inactivity, reducing idle power consumption to 0.5W.

Technical Specifications

Connections at a Glance

• 1 x Optical Digital Input (TV)
• 1 x Coaxial Digital Input (Blu-ray / source)
• 1 x Phono MM Input (turntable)
• 8 x Analog Audio Inputs
• 2 x Analog Audio Outputs
• 1 x Subwoofer Output
• 4 x Gold-Plated Speaker Terminals (A/B/A+B)
• 1 x DC Out

Frequently Asked Questions

What is the Yamaha A-S501?

The Yamaha A-S501 is a stereo integrated amplifier from Yamaha, rated at 85W per channel RMS into 8 ohms, built on the ToP-ART design platform with a fully symmetrical signal path, Pure Direct mode, digital audio inputs, and a phono MM stage. It is designed to serve as the centrepiece of a two-channel HiFi system, supporting both analogue sources such as turntables and digital sources such as televisions and Blu-ray players. The A-S501 is available at Vinyl Sound in Toronto, Canada.

How does the Yamaha A-S501 compare to the Cambridge Audio AXA35 and Marantz PM6007?

The Yamaha A-S501 competes directly with the Cambridge Audio AXA35 and Marantz PM6007 in the entry-to-mid-range stereo integrated amplifier segment. The A-S501 delivers 85W per channel RMS, which exceeds the AXA35's 35W and is comparable to the PM6007's 45W into 8 ohms. The A-S501's damping factor of 240 is significantly higher than both rivals, indicating stronger speaker control. Unlike the AXA35, the A-S501 includes both optical and coaxial digital inputs and a continuously variable loudness control. The Marantz PM6007 includes a built-in DAC with more digital input flexibility, while the A-S501's ToP-ART symmetrical circuit layout and ART Base chassis represent a more mechanically rigorous approach to noise rejection and vibration isolation at this price level.

Can the Yamaha A-S501 connect to a turntable directly?

Yes, the Yamaha A-S501 includes a dedicated phono MM input that allows direct connection of any turntable equipped with a moving-magnet cartridge, with no external phono preamplifier required. This makes the A-S501 a practical choice for listeners who want to integrate vinyl playback into a modern HiFi system alongside digital sources such as a TV or Blu-ray player.

What is Pure Direct mode and when should I use it?

Pure Direct is a signal routing mode on the A-S501 that bypasses the buffer amplifier, tone controls, loudness control, and balance circuit, directing the audio signal through the shortest possible path from input to speaker terminals. It is best used when listening to high-quality source material such as vinyl records, lossless digital audio, or CD, where maximum transparency and the least possible signal processing is desired. Tone and loudness adjustments are unavailable while Pure Direct is active.

Does the Yamaha A-S501 support two pairs of speakers?

Yes, the Yamaha A-S501 provides four gold-plated speaker terminals supporting two separate speaker systems, labelled A and B. You can switch between Speaker A, Speaker B, or run both A and B simultaneously using the front-panel selector. This is useful for listeners who want to use different speakers in different rooms or switch between a primary and secondary pair without rewiring.

Where can I buy the Yamaha A-S501 in Toronto or Canada?

The Yamaha A-S501 is available at Vinyl Sound, an authorized Yamaha dealer in Toronto, Canada. Purchasing from an authorized Canadian dealer ensures full Yamaha manufacturer warranty coverage and access to local product support. Vinyl Sound carries a broad selection of Yamaha HiFi and home theater equipment for in-store demonstration and consultation.

Is the Yamaha A-S501 suitable for high-impedance or difficult speaker loads?

Yes, the Yamaha A-S501 is well suited to a range of speaker loads. Its high dynamic power output scales from 130W per channel into 8 ohms up to 220W per channel into 2 ohms, and its damping factor of 240 indicates strong control over speaker driver movement. This combination makes the A-S501 a stable and capable match for both standard 8-ohm speakers and more demanding 4-ohm designs commonly found in bookshelf and floorstanding HiFi loudspeakers.

What digital sources can I connect to the Yamaha A-S501?

The Yamaha A-S501 accepts both optical and coaxial digital audio inputs. The optical input is intended for connection to a television, while the coaxial input is suited to a Blu-ray player or CD transport. Both inputs keep the audio signal in the digital domain up to the point of conversion, delivering clean, interference-free playback from entertainment and home cinema sources alongside the amplifier's analogue inputs.