Yamaha A-S700 Integrated Amplifier User Manual

Yamaha A-S700 Integrated Amplifier Manual

Introduction

The Yamaha A-S700 Integrated Amplifier is a high-power stereo amplifier designed for listeners who want detailed, dynamic sound from a traditional two-channel hi-fi system. It combines a preamplifier and power amplifier in one chassis, providing a practical control center for CD players, network players, tuners, turntables with a suitable phono output, and other line-level audio sources.

With 90 watts per channel into 8-ohm speakers, a high-current power supply, ToP-ART construction, and Yamaha’s Pure Direct mode, the A-S700 is suited to both music listening and home entertainment systems. Its switchable CD Direct Amplification feature can shorten the signal path for compatible CD sources, while the tone controls allow bass and treble adjustment when room acoustics or speaker placement require correction.

This Yamaha integrated amplifier is intended for stereo enthusiasts, vinyl listeners, and users building a straightforward hi-fi system without a separate preamplifier and power amplifier. It is particularly useful for bookshelf or floorstanding speakers that benefit from strong current delivery and conventional analog connectivity. The supplied remote control also provides convenient source selection, volume adjustment, muting, and basic playback control for compatible Yamaha components.

Because the A-S700 is an analog integrated amplifier rather than a modern network receiver, it does not replace a streamer or digital-to-analog converter. Pair it with the appropriate source equipment for a flexible and focused two-channel listening setup.

Yamaha A-S700 Specifications and Key Features

• Amplifier type: Two-channel integrated stereo amplifier.
• Minimum RMS output: 90 watts + 90 watts into 8 ohms from 20 Hz to 20 kHz at 0.019% THD.
• Output at 6 ohms: 105 watts + 105 watts from 20 Hz to 20 kHz at 0.03% THD.
• Maximum power for Europe: 160 watts + 160 watts into 4 ohms at 1 kHz and 0.7% THD.
• High dynamic power per channel: 140 watts at 8 ohms, 170 watts at 6 ohms, 220 watts at 4 ohms, and 290 watts at 2 ohms.
• Frequency response: 10 Hz to 100 kHz, within ±1 dB.
• Total harmonic distortion: 0.012% for CD to speaker output at 50 watts into 8 ohms.
• Signal-to-noise ratio: 110 dB for the CD input with the input shorted at 200 mV.
• Damping factor: 240, supporting controlled speaker-driver movement.
• Special functions: Pure Direct mode, ToP-ART design, and switchable CD Direct Amplification.
• Dimensions: 435 × 151 × 382 mm.
• Weight: 10.9 kg.

How to Set Up the Yamaha A-S700 Integrated Amplifier

1. Place the amplifier on a stable, level surface with open space around the ventilation openings. Do not install it inside a tightly enclosed cabinet.
2. Turn the amplifier off and disconnect the AC power before making connections.
3. Connect the left and right speakers to the corresponding SPEAKERS A or B terminals. Observe polarity: connect the red or positive terminal to the speaker’s positive terminal and the black or negative terminal to its negative terminal.
4. Connect a CD player, tuner, streamer, DAC, or other line-level source to the matching input using suitable analog audio cables.
5. Connect a turntable only when its output is compatible with the amplifier’s PHONO input. A turntable requiring an external phono preamplifier must be connected through that preamplifier to a line-level input.
6. Attach the supplied power cable, then connect it to a suitable AC outlet. Keep the amplifier’s power switch off while completing the installation.
7. Turn on the source component first, select the correct input, start playback, and gradually raise the volume.
8. Use Pure Direct for a shorter signal path. Disable it when bass, treble, balance, or loudness adjustments are needed.

Never connect speaker wires with loose strands that could touch adjacent terminals. Do not operate the amplifier with speaker impedance or wiring arrangements outside the limits specified in the owner’s manual.

Yamaha A-S700 Troubleshooting Guide

No power

Confirm that the power cable is fully inserted, the AC outlet works, and the rear-panel connections are secure. If the amplifier switches off repeatedly, disconnect all equipment and speakers, allow it to cool, and reconnect one component at a time. Persistent shutdown may indicate a protection condition or internal fault.

No sound

Check that the correct input is selected, the source is playing, mute is disabled, and the volume is raised. Confirm that the speaker selector is set to the terminals being used. Inspect both speaker cables for reversed, loose, or shorted connections.

Sound from only one channel

Swap the left and right source cables to determine whether the problem follows the source or remains on the same amplifier channel. Check balance control, speaker wiring, and the source component’s output.

Hum or unwanted noise

Separate signal cables from AC power cables and test sources individually. Turntable hum can result from an incorrect grounding connection or unsuitable phono configuration. Disconnect unused components to identify a ground-loop or faulty cable.

Remote control problems

Replace the batteries, remove obstacles between the remote and amplifier, and operate within a reasonable distance. Confirm that the remote is aimed at the amplifier’s sensor.

The A-S700 does not use user-facing numeric error codes in normal operation. If protection shutdown continues, stop using the unit and contact Yamaha support or an authorized service center. In the United States, Yamaha lists customer support at (866) 430-2652; regional support details may differ.

Yamaha A-S700 Pros and Cons

Advantages

• Strong stereo output: Its 90-watt-per-channel rating provides substantial headroom for many bookshelf and floorstanding speakers.
• High-current design: Dynamic power specifications support demanding musical passages and speaker loads.
• Useful analog flexibility: Multiple conventional inputs, speaker A/B selection, and a phono input suit classic hi-fi systems.
• Pure Direct mode: This feature can reduce signal-path processing when tone controls are unnecessary.
• Practical operation: Front-panel controls and a remote make source selection and volume adjustment straightforward.
• Solid construction: ToP-ART design, a substantial chassis, and a 10.9 kg build emphasize traditional amplifier engineering.

Limitations

• No built-in network streaming: A separate streamer or network player is required for internet and wireless music services.
• No modern digital section: Users connecting televisions, computers, or game consoles may need an external DAC or analog converter.
• Traditional stereo focus: It is not a multichannel AV receiver and does not provide surround decoding or HDMI switching.
• Limited automation: It lacks app control and the smart-home features typical of newer network amplifiers.

The Yamaha A-S700 Integrated Amplifier is best for listeners who value powerful, uncomplicated two-channel amplification and already own suitable analog sources. A newer network amplifier may be a better choice for anyone who needs streaming, HDMI connectivity, wireless control, or integrated digital inputs.