Yamaha A-S500 Integrated Amplifier User Manual

Yamaha A-S500 Integrated Amplifier Manual

Introduction to the Yamaha A-S500 Integrated Amplifier

The Yamaha A-S500 Integrated Amplifier is a two-channel hi-fi amplifier designed for listeners who want powerful stereo performance, flexible analog connectivity, and straightforward operation. Its 85-watt-per-channel output into 8-ohm speakers provides ample headroom for music listening in small and medium-sized rooms, while Yamaha’s ToP-ART design focuses on short, symmetrical signal paths and controlled internal vibration.

This integrated amplifier combines a preamplifier and power amplifier in one chassis, reducing the need for separate components. It includes dedicated analog inputs for sources such as a CD player, turntable, tuner, television, or network audio device. A built-in phono input supports a compatible moving-magnet turntable cartridge, while the subwoofer output allows a powered subwoofer to be added to a traditional stereo system.

Useful controls include continuously variable loudness adjustment, bass and treble controls, balance adjustment, speaker A/B selection, a record-out selector, and Pure Direct operation. Pure Direct shortens the audio signal path to help reduce unwanted processing during critical listening.

The Yamaha A-S500 suits listeners building a classic hi-fi system, upgrading from a basic receiver, or powering bookshelf and floorstanding speakers with a conventional analog setup. It is less suitable for users who require built-in Bluetooth, Wi-Fi streaming, HDMI switching, digital audio inputs, or modern room-correction features.

Yamaha A-S500 Specifications and Key Features

• Amplifier type: Two-channel integrated stereo amplifier.
• Rated output power: 85 W + 85 W into 8 ohms, from 20 Hz to 20 kHz, at 0.019% total harmonic distortion.
• Maximum output: 105 W + 105 W into 8 ohms at 1 kHz and 10% total harmonic distortion.
• Dynamic power per channel: 130 W at 8 ohms, 150 W at 6 ohms, 185 W at 4 ohms, and 220 W at 2 ohms.
• Frequency response: 10 Hz to 100 kHz with a ±1 dB tolerance.
• Signal-to-noise ratio: 100 dB for the CD input with Pure Direct and the input shorted; 90 dB for the phono input under the specified test conditions.
• Phono input: 3 mV input sensitivity with a 47-kilohm impedance.
• CD input: 200 mV input sensitivity with a 47-kilohm impedance.
• Connectivity: Six audio inputs and two audio outputs, including a phono input, record output, subwoofer output, and Yamaha iPod dock connection.
• Speaker operation: Speaker A, speaker B, or A+B selection, subject to the connected speakers’ impedance requirements.
• Construction: ToP-ART design, ART Base chassis construction, aluminum front panel, dual aluminum heat sinks, center reinforcement bar, and gold-plated terminals.
• Dimensions and weight: Approximately 17-1/8 inches wide, 6 inches high, 15-1/4 inches deep, and 22.7 pounds.
• Power management: Automatic power-down functionality and approximately 0.5 W standby consumption.

How to Set Up the Yamaha A-S500

1. Place the amplifier on a stable, level surface with open space above and around the ventilation openings. Do not install it inside a sealed cabinet.
2. Turn the amplifier off and disconnect it from AC power before making connections.
3. Connect the left and right speaker cables to the corresponding Speaker A terminals. Observe correct polarity by connecting positive to positive and negative to negative.
4. Connect analog source components to the matching RCA inputs. Use the phono input only with a compatible turntable cartridge, and connect the turntable ground wire to the grounding terminal.
5. Connect a powered subwoofer to the subwoofer output using an appropriate RCA cable. Adjust crossover and level controls on the subwoofer.
6. Connect a recorder to the record-out connections if required. Record output is intended for recording equipment and is not the same as a variable volume-controlled pre-out.
7. Confirm that the volume is set low, connect the AC power cord, and switch on the amplifier.
8. Select the correct input, choose Speaker A or B, and gradually raise the volume.
9. Use Pure Direct for a shorter signal path. Disable it when bass, treble, balance, or loudness adjustments are needed.

Never connect speaker terminals to one another, ground a speaker terminal, or connect and disconnect cables while the amplifier is powered on. If there is no sound, verify the selected input, cable connections, speaker selector, and source-component output.

Yamaha A-S500 Troubleshooting Guide

No power

Check that the power cord is firmly connected and that the AC outlet works. If the amplifier entered automatic standby, press the power button again and confirm that the source is active.

No sound

Confirm the correct input is selected, mute is disabled, the volume is raised, and the appropriate Speaker A or B selection is active. Inspect both ends of every RCA and speaker connection. For a turntable, verify the ground wire and phono-input compatibility.

Sound from only one channel

Swap the left and right source cables briefly. If the problem moves, the source cable or source component may be at fault. If it remains on the same speaker, inspect the speaker cable, terminal tightness, and speaker itself.

Hum or unwanted noise

Keep signal cables away from power cords and confirm that all RCA plugs are fully inserted. Turn off nearby electronic devices to identify possible interference. A turntable ground connection can reduce phono hum.

Distortion or shutdown

Reduce the volume and check for shorted speaker wires or loose strands touching adjacent terminals. Improve ventilation and avoid operating two speaker pairs simultaneously if the combined impedance is unsuitable.

The A-S500 documentation does not provide a broad consumer-facing numerical error-code system; protection behavior may instead appear as muted output or shutdown. Disconnect power before inspection and allow the unit to cool. For unresolved faults, consult the official Yamaha A-S500 owner’s manual and Yamaha support service. Keep the model name, serial number, purchase documentation, and a description of the problem available when requesting assistance.

Yamaha A-S500 Pros and Cons

Advantages

• Strong stereo output: 85 watts per channel supports many bookshelf and floorstanding speakers in conventional home listening rooms.
• Flexible analog system control: Phono, CD, line-level inputs, record output, and a subwoofer output cover common traditional hi-fi requirements.
• Useful speaker management: Speaker A, B, and A+B selection makes it possible to operate multiple compatible speaker pairs.
• Pure Direct mode: The shortened signal path is useful for focused two-channel listening.
• Practical tone controls: Bass, treble, balance, and continuously variable loudness help adapt the sound to room conditions and listening levels.
• Durable construction: The aluminum front panel, reinforced chassis, heat sinks, and gold-plated connections provide a solid platform for a long-term stereo system.

Limitations

• No built-in digital inputs: Modern televisions, computers, and streamers generally require an external digital-to-analog converter or analog output.
• No network or wireless streaming: Bluetooth, Wi-Fi, Spotify Connect, and multiroom functions are not integrated.
• No HDMI connectivity: The amplifier is not designed as a home-theater control center.
• Analog-focused operation: Users wanting room correction, surround sound, or app-based control may need a newer network amplifier or AV receiver.
• Discontinued model: Documentation and service availability may depend on the region and remaining manufacturer support options.

The Yamaha A-S500 is best for listeners who value clean, powerful two-channel amplification and physical controls. Choose a newer connected amplifier instead if built-in streaming, television integration, digital inputs, or surround processing is a priority.