Yamaha MA2120 Owner's Manual

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First, please carefully read the “IMPORTANT SAFETY INSTRUCTIONS” on the reverse side.

Thank you for your purchase of the Yamaha MA2120 power amplifier. Please read through this manual 

carefully before beginning use, so that you will be able to take full advantage of the device’s various 

functions. After you have read the manual, keep it in a safe place.

•  The illustrations as shown in this manual are for instructional purposes only.

•  The company names and product names in this manual are the trademarks or registered trademarks of 

their respective companies.

Features

•  Complies with the ENERGY STAR international standard for energy efficient products.

•  Supports both high-impedance and low-impedance speaker connections.

•  Mixing/Routing function allows you to mix various sources and to output to one stereo channel, or two 

mono channels. Source and volume zoning capability for two zones in mono connection.

•  Equipped with an auto-wake function that turns the power on after detecting an input signal when in 

standby mode.

•  Various digital signal processing and effects, including reverb, compressor, EQ, leveler, ducker and 

feedback suppressor.

•  Built-in “Speaker EQ” that allows for tuning the sound quality to be perfect for use with Yamaha 

speakers.

•  Remote controllable with up to two DCP control panels. 

Accessories (Please confirm that all items are included)

•  Power cord

•  Euroblock plugs (6-pin x 3, 3-pin x 1, both with a 3.5mm pitch)

•  Setup Guide

•  Owner’s Manual (this sheet)

About Manuals

Owner’s Manual (this leaflet)

Explains about precautions, controls and functions on the panel, attaching Euroblock plugs, connecting 

speaker cables, and connecting external devices. 

Setup Guide (separated)

Provides setup examples, explains settings to make after installation, and connecting control panels and 

remote controller.

ENERGY STAR Certification

This device complies with the ENERGY STAR international standard for energy 

efficient products.

It automatically enters into standby mode when no input signal is detected for 25 

minutes in order to save power while not in use.

In addition, a highly efficient amplifier circuitry design has been adopted to reduce 

energy consumption while the device is in use.

Auto-Standby and Auto-Wake Functions

To reduce energy consumption, this device enters into standby mode when no input signal is detected for 

25 minutes.

It is also equipped with an auto-wake function that automatically turns the power on when an input signal 

is detected while in standby mode. Even when the device has been put into standby mode by the auto-

standby function, any microphone or BGM audio input will restore the power.

The auto-wake function is turned on by default. The auto-wake function can be turned on or off by 

changing the rear panel [SETUP] DIP switch setting. (Refer to “Controls and Functions.”)

Setup Example

■

When multiple speakers are connected to the two zones: 

(MODE: MONO)

BMG source

DCP (for zone A)

DCP (for zone B)

Zone B: 7.5W x 10 = 75W

Zone A: 15W x 6 = 90W

■

When two-channel stereo is used: 

(MODE: STEREO)

BMG source

DCP

120W x 2 (two-channel stereo)

1

 [z] button (Standby/On)

Switches the device mode between standby and on.

On:

 Press the [z] button when in standby mode. The button lights in green to indicate that the device is on.

Standby:

 Press and hold the [z] button for at least one second when the device is on. The button lights in orange to 

indicate that the device is in standby mode.

The button lights in lime green for a few seconds while the status is switched between on and standby.

NOTE  •  The device automatically enters standby mode when no input signal is detected for 25 minutes. The rear panel DIP 

switch can be set to enable the auto-wake function that turns the power on upon detecting an input signal.

•  Rapidly turning the unit on and off in succession can cause it to malfunction. After turning the unit off, wait for about 6 

seconds before turning it on again.

2

 [VOLUME A] and [VOLUME B] knobs

Used to adjust [SPEAKER A] and [SPEAKER B] output levels.

3

 [BASS] and [TREBLE] controls

Two-band equalizer used to adjust the tone of the output signal to [SPEAKER A] and [SPEAKER B].

They can be adjusted with a tool such as a screwdriver.

4

 [SIG] indicator

Lights up when the output signal to [SPEAKER A] or [SPEAKER B] is -42dBFS (42dB lower than the maximum output) 

or higher.

5

 [LIMIT] indicator

Lights up when the limiter that prevents excessive output to [SPEAKER A] and [SPEAKER B] compresses the signal 

more than 3dB, for example. Adjust the input and output levels as LIMIT indicators do not light.

6

 Input level knobs 1 - 8

Adjusts the input levels for [INPUT 1] - [INPUT 8]. Turning to the right increases the input level. In usual mode, press the 

knob to blink the [SIG] indicator of the output which the pressed channel is assigned to. You can confirm the selected 

output by the [ROUTE] switch of the rear panel.

In setup mode, press the knob to select the function to adjust, or to select a channel for adjustment.

For more information regarding setup mode, refer to the “Setup Guide”.

7

 [INPUT SIG] indicators 1 - 8

Light up when the [INPUT 1] - [INPUT 8] input signal levels exceed -40dBFS.

Adjust the input levels to a point where these indicators light by the input level knobs.

8

 [INPUT PEAK] indicators 1 - 8

Light up when the [INPUT 1] - [INPUT 8] input signal levels exceed -3dBFS.

9

 [AUX IN] jack

Input jack of mini-stereo type (unbalanced input). Connect a stereo audio source such as portable audio players.

The signal from the [AUX IN] jack mixes with the signal from the [INPUT] jack 8 in the same signal path.

0

 [SETUP] encoder/indicators 1 - 3

Push encoders for the various inbuilt adjustment functions. Press and hold this button to enter setup mode.

Indicators 1 - 3 show adjustment values for setup mode functions.

For more information regarding setup mode, refer to the “Setup Guide”.

A

 AC IN connector

Connect the supplied power cord.

 Caution

•  When connecting the power cord, connect the power cord to the connector and then plug it into an appropriate AC power 

outlet.

•  Before connecting or disconnecting the power cord, make sure that the device power is in standby mode.

B

 [SETUP] DIP switches

Set the following functions of the device. The setting change will be applied after carrying out a power cycle by 

pressing the [z] button on the front panel.

DIP switch setting combinations are shown as follows.

DIP switches 1/2: Panel lock

Set knobs and controls to be locked on the panel.

1

2

Setting

Panel lock off (All controls are enabled)

Locks the [SETUP] knob

Locks controls other than [VOLUME] knobs

Panel lock on (All controls are disabled)

DIP switches 3/ 4: Auto-wake

Enable the function where the device automatically turns on from standby mode upon detection of an input signal.

3

4

Setting

Auto-wake function on

Auto-wake function on. Only when the system is switched from AC off to standby mode due to insertion of the 

AC plug, or put into standby mode by the auto-standby function.

Auto-wake function off

NOTE  The auto-wake function is completely disabled if the device has been put into standby mode through operation via the 

[REMOTE] connector.

DIP switch 5: A - B volume link

Sets whether SPEAKER A and SPEAKER B volume is linked.

When the link function is on, use the [VOLUME A] knob to control the volume.

5

Setting

Link off (SPEAKER A and SPEAKER B volume levels are independently controlled)

Link on (SPEAKER A and SPEAKER B volume levels are both controlled via the [VOLUME A] knob)

NOTE  If you turn on “A - B volume link” when the function to allow control of the line out volume A and B by the [VOLUME] knob 

is enabled in setup mode, LINE OUT A and B are also linked.

DIP switch 6: DCP volume link

Sets whether the [SPEAKERS] and [LINE OUT] jack output levels are linked, when changing the volume via the DCP.

6

Setting

Link off ([SPEAKERS] and [LINE OUT] jack volume levels are controlled separately)

Link on ([SPEAKERS] and [LINE OUT] jack output is controlled together)

NOTE  When the link function is on, you can control the volume by using both of [SPEAKER] and [LINE OUT] on the control 

panel.

DIP switches 7/8:  Ducker

Configure the settings for the Ducker function. This can mute the microphone input of other channels, and lower the 

volume of line input when signals are input to [INPUT 1] or [INPUT 3].

7

8

Setting

Ducker off

Ducker on when signals are input to [INPUT 1].

Ducker on when signals are input to [INPUT 3].

Ducker on when signals are input to [INPUT 1] or [INPUT 3]. If signals are input to both of them, [INPUT 1] is 

given precedence.

C

 [SPEAKERS] output terminals

Barrier strip type speaker output connectors. Output connectors A and B are available. Refer to “Connecting Speaker 

Cables” for the installation instructions.

D

 [SPEAKER A] and [SPEAKER B] DIP switches

Sets the amplifier mode and speaker EQ to match the type of speakers that are connected. The setting change will be 

applied after carrying out a power cycle by pressing the [z] button on the front panel.

DIP switch setting combinations are shown as follows.

DIP switches 1, 2, and 3: Amplifier mode setup

Sets the amplifier output power and impedance.

NOTICE

If the DIP switch settings do not match the actual speaker impedance or input power rating, the device may have poor 

performance, and it may even lead to malfunction or sound dropout. Always ensure that appropriate settings are chosen.

1

2

3

Setting

Amplifier output 120W, High-impedance 100V

Amplifier output 120W, High-impedance 70V

Amplifier output 200W, High-impedance 100V, Output only from [SPEAKERS] output terminal A

Amplifier output 200W, High-impedance 70V, Output only from [SPEAKERS] output terminal A

Amplifier output 100W, Low-impedance 8Ω or more

Amplifier output 120W, Low-impedance from 4Ω to less than 8Ω

Amplifier output 100W, Low-impedance from 3Ω to less than 4Ω

Output muted

DIP switches 4, 5, and 6: Speaker EQ

Sets the speaker EQ that corrects the output signal to match the type of speakers that are connected.

4

5

6

Setting

Off

High pass filter 150Hz

Low pass filter 150Hz

Low pass filter 200Hz

Frequency correction tailored for Yamaha VXS series speakers

Frequency correction tailored for the Yamaha VXS10S/VXS10ST subwoofer (45–150Hz)

Frequency correction tailored for Yamaha VXC series speakers

E

 [DCP] connector

Allows you to connect up to two DCP1V4S, DCP4S, or DCP4V4S Yamaha Digital Control Panels.

For more information regarding the connection method, refer to “Connecting a Control Panel” in the “Setup Guide”.

F

 [REMOTE] connector

A Euroblock 3-pin plug can be inserted to remotely carry out control such as muting all channels or putting the device 

in and out of standby mode. For more information, refer to “Using the [REMOTE] Connector (Euroblock 3-pin)” in the 

“Setup Guide”.

G

 [LINE OUT] jacks

RCA type line output jacks (unbalanced output). The same signal that is output by the [SPEAKERS] jacks is output 

to these jacks. Output jacks A and B are available. The audio signal inputs for each [INPUT] connectors are passed 

through the built-in effects and mixed together. Then, the output is generated at the line level. These jacks can be used 

to connect an additional amplifier when the number of speakers is too much for this device to handle alone.

H

 [INPUT] connectors 1 - 6

Euroblock 3-pin input connector (balanced). Connect the line output connector of a microphone or other external 

device.

I

 [GAIN] switches

Set the gain for [INPUT] connectors 1 - 6. Each switch controls two channels.

Switch

Setting

MIC(+24V)

Microphone level, phantom power (+24V) on.

MIC

Microphone level, phantom power off.

LINE

Line level, phantom power off.

 Caution

•  Only switch the phantom power on/off when the [VOLUME A] and [VOLUME B] knobs are turned all the way down.

•  Keep the phantom power turned off when it is not required, or if you wish to connect a non-supporting device.

•  Do not connect or disconnect the cable while phantom power is left on.

NOTE  •  When the [GAIN] switch is set to “MIC(+24V)” or “MIC”, a noise gate (-72dBFS) is automatically applied to the input. 

This automatically reduces surrounding noise when the microphone is not being used. 

A noise gate is also applied to the [MONO SUM INPUT] when the [GAIN] switch for input 5 and 6 is set to 

“MIC(+24V)” or “MIC.” Please set the [GAIN] switch to “LINE” when using the [MONO SUM INPUT] jacks.

•  When changing the [GAIN] switch during the power standby status, the change will only be reflected after the 

power is turned on. Therefore, the Auto-wake function may not work properly because of an absence of input level 

depending on the previous gain setting. Be sure to set the gain properly for the Auto-wake function to work properly.

J

 [ROUTE] switches

Set the output destination for the signals from [INPUT] connectors 1 - 6. Each switch controls two channels.

For [INPUT] jacks 7 and 8, these switch set the output destination only when the [MODE] switch is set to “MONO.”

Switch

Setting

A

Output to A

B

Output to B

A&B

Output to A and B

K

 [MONO SUM INPUT] jacks 5 and 6

RCA type line input jacks (unbalanced input). Two lines can be connected to [INPUT 5] and [INPUT 6]. All input signals 

are mixed to mono. All signals are mixed, even when there is simultaneous input via a Euroblock plug on [INPUT] 

connectors 5 and 6.

L

 [INPUT] jacks 7 and 8

RCA type line input jacks (unbalanced input). Connect the line output connector of an external device.

M

 [MODE] switch

Sets the method in which input signals from [INPUT 7] and [INPUT 8] are sent as output to the [SPEAKERS] or [LINE 

OUT].

Switch

L channel output destination

R channel output destination

STEREO

Zone A

Zone B

MONO

The L/R channel signals are mixed to mono. The resulting mono 

signal output destination depends on the [ROUTE] switch setting.

Controls and Functions

Front Panel

Rear Panel

1

Specifications

Output Power

(20msec Burst, 

THD+N=1%)

AMP MODE = 3Ω

100W x 2ch

AMP MODE = 4Ω

120W x 2ch

AMP MODE = 8Ω

100W x 2ch

AMP MODE = 70V/120W

120W x 2ch

AMP MODE = 100V/120W

120W x 2ch

AMP MODE = 70V/200W

200W x 1ch

AMP MODE = 100V/200W

200W x 1ch

Amplifier type (Output circuitry)

Class D

THD+N

LINE IN to SPEAKER OUT, 

Half power@1kHz 

AMP MODE = 3Ω, 4Ω, 8Ω

≤ 0.2%

LINE IN to SPEAKER OUT, 

Half power@1kHz 

AMP MODE = 70V, 100V/120W

≤ 0.2%

LINE IN to SPEAKER OUT, 

Half power@1kHz 

AMP MODE = 70V, 100V/200W

≤ 0.2%

Frequency Response

LINE IN to SPEAKER OUT, 

50Hz to 20kHz@1W 

AMP MODE = 3Ω, 4Ω, 8Ω

0dB, -3.0dB, +1.0dB

LINE IN to SPEAKER OUT, 

90Hz to 20kHz@1W 

AMP MODE = 70V, 100V/120W

0dB, -3.0dB, +1.0dB

LINE IN to SPEAKER OUT, 

90Hz to 20kHz@1W 

AMP MODE = 70V, 100V/200W

0dB, -3.0dB, +1.0dB

LINE IN to LINE OUT, 

20Hz-20kHz

0dB, -2.5dB, +1.0dB

Crosstalk

MIC/LINE IN to other MIC/LINE IN

≤ -70dB

AC Power Requirement

100V, 120V, 230V-240V 50Hz/60Hz (*1)

*1 It has confirmed that it is working with ± 10% of the voltage of the rated supply voltage.

Power Consumption

Standby, default setting 

AMP MODE = All

≤ 1W

Idle 

AMP MODE = 3Ω, 4Ω, 8Ω

15W

Idle 

AMP MODE = 70V, 100V

20W

1/8 Output, Pink noise 

AMP MODE = 4Ω

60W

1/8 Output, Pink noise 

AMP MODE = 70V/120W

60W

ENERGY STAR

•  It automatically enters into standby mode when no input 

signal is detected for 25 minutes in order to save power 

while not in use.

•  Amplifier efficiency: 44% and more.

•  Less than 1W in standby.

Operating temperature

0°C to +40°C

Storage temperature

-20°C to +60°C

Dimensions (W x H x D, not including knob)

480 x 44 x 351mm (18.90 x 1.73 x 13.82 inch)

Net Weight

4.9kg

Included Accessories

AC power cord (2.0m) x1,

3.5mm Euroblock plug (6pin) x3,

3.5mm Euroblock plug (3pin) x1,

Owner’s Manual x1,

Setup Guide x1

Optional accessories

Digital Control Panel 

(DCP1V4S-US/EU, DCP4V4S-US/EU, DCP4S-US/EU)

*  The contents of this manual apply to the latest specifications as of the printing date. Since Yamaha makes continuous 

improvements to the product, this manual may not apply to the specifications of your particular product. To obtain the 

latest manual, access the Yamaha website then download the manual file. Since specifications, equipment or separately 

sold accessories may not be the same in every locale, please check with your Yamaha dealer.

European models

Purchaser/User Information specified in EN55103-2:2009.

Conforms to Environments: E1, E2, E3 and E4

POWER AMPLIFIER

Owner’s Manual

EN

ZT16280