The Yamaha A-S1100 Analog Stereo Integrated Amplifier

No-nonsense classic high-end analog audio

Yamaha A-S1100 Two-Channel Integrated Stereo Amplifier


While most home theater audio systems in consumers' homes are used for listening to both movies and music, for some, especially dedicated audiophiles, a home theater receiver doesn't cut it for serious music listening – only a dedicated two-channel audio system will do. For those that require such a setup, Yamaha has an impressive line of two-channel amplifiers. One distinctive offering in this category is A-S1100.

Power Behind Great Styling

To start, the Yamaha A-S1100 is a two-channel integrated stereo amplifier that incorporates heavy-duty construction and styling, including a black or silver finish option, wood side panels, and a distinctive front panel with includes large left and right channel analog level/watt meters (It would great to have that feature on a home theater receiver!).

The front panel also includes large bass, treble, and balance controls, as well as a rotary input selection switch, and large classic-style volume control.

Yamaha A-S1100 Integrated Amp – Front Panel Controls

Behind the front panel and its controls, the A-S1100 incorporates a large capacity power supply that can push out continuous power over long periods, as well as providing fast recovery and reaction time for audio peaks.

Yamaha A-S1100 Integrated Amplifier – Interior

The power output capability for the Yamaha A-S1100 is 90 wpc, using a 20Hz to 20kHz test tone range with an 8-ohm load with a .07% THD.

For more details on what these stated power ratings mean with respect to real-world conditions, refer to our article Understanding Amplifier Power Output Specifications.

The Yamaha A-S1100 is definitely no lightweight in the amplifier department. At about 50lbs it is heavier than most home theater receivers, so care is needed when lifting or moving.


The Yamaha A-S1100 has all the necessary connections needed for a good two-channel audio listening setup.

To start, 3 sets of analog RCA stereo inputs, as well as an audio record in/out record loop for connection of a CD recorder/Audio Cassette Deck, or other compatible recording devices, are provided.

Also, Pre-amp out/Main in the loop for connection to an external amplifier or equalizer is provided, if desired.

For vinyl record listening, a dedicated phono turntable input that can accommodate both Moving Magnet (MM) and Moving Coil (MC) phono cartridges (switchable via a front panel control).

Yamaha A-S1100 Integrated Amplifier – Input/Output Connections

In terms of speaker connections, the A-S1100 provides both A and B speaker output connections which can also be configured for a bi-wiring setup using heavy-duty brass screw-on speaker terminals.

You can connect either 4 or 8-ohm speakers if you are using either the A or B speaker connection options. However, if you are using A and B speakers at the same time (including for Bi-Wiring) you must use 8-ohm speakers only.

Unlike a home theater receiver or amplifier that has a Zone 2 function, the same audio signal is sent to both the A and B speakers if that feature is used.

Yamaha A-S1100 Integrated Amplifier – Speaker Connections

For private listening, the AS-1100 also includes a front-mounted 1/4-inch headphone jack.

However, one speaker-type connection option you won't find on the Yamaha A-S110 is a subwoofer output. After all, this is a classic old school two-channel stereo we are talking about – so for best listening results, use a set of good full-range floor-standing speakers, rather than bookshelf units.

Control Options

Control options include the provided remote as well as rear-panel IR sensor plug-in connections (labeled Remote) so that the A-S1100 can be hidden from view or control another compatible device that has an IR sensor input connection. A 12-volt trigger is also provided that can be used to turn one additional compatible component on or off.

The A-S1100's remote control can operate select Yamaha Tuners and CD Players.

Yamaha A-S1100 Integrated Amplifier Control Options

What The A-S1100 Doesn't Have

It is also important to point out that since the A-S1100 is an integrated amplifier, it does not include digital optical/coaxial or USB inputs, built-in AM/FM tuner, internet radio, or access to smartphone app control as would find in a home theater or some stereo receivers. If you want the benefit of one, or more, of those features in a two-channel setup, you might want to check out two-channel network Stereo Receivers or add on Yamaha's T-S500 AM/FM Tuner.

The Bottom Line

The Yamaha A-S1100 is a high-end integrated amp that provides powerful clean sound desires for serious music listening.

The A-S1100 is designed to be a match with Yamaha's High-end CD-S2100 CD player but can be used with any audio source that has analog audio outputs. The A-S1100 can also be used as part of a second or third zone audio system in conjunction with home theater receivers that feature multi-zone capability.