First, please carefully read the “IMPORTANT SAFETY INSTRUCTIONS” on the reverse side.
Thank you for your purchase of the Yamaha PA2120 power amplifie . 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 p oducts.
• Supports both high-impedance and low-impedance speaker connections.
• 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.
• Able to be remotely controlled by connecting a DCP series control panel.
• Built-in “Speaker EQ” that allows for tuning the sound quality to be perfect for use with Yamaha speakers.
Accessories (Please confirm that all items are included)
• Power cord
• Euroblock plugs (6-pin x 1, 3-pin x 1, both with a 3.5mm pitch)
• Technical Specifications (English only): includes block diagrams, dimensions, and input/output
specifications
• Owner’s Manual (this sheet)
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 c cuitry 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)
Attaching Euroblock Plugs
Example (connection to the [REMOTE] connector)
1
2
3
4
Loosen
Tighten
Slotted
screwdriver
Approx. 5 mm
(approx. 0.2”)
Terminal
screw
Euroblock plug
NOTE
• You must use the supplied Euroblock plugs. If the plugs have been lost, please contact your Yamaha dealer.
• To prepare the cable for attachment to a Euroblock connector, strip the wire as shown in the illustration using
stranded wire to make connections. With a Euroblock connection, stranded wires may be prone to breakage
because of metal fatigue due to the weight of the cable or due to vibration. When rack mounting your device,
use a lacing bar when possible to bundle and fasten the cables.
• Do not tin (solder) the exposed end.
1
Loosen terminal screws.
2
Insert cables.
3
Securely tighten terminal screws.
4
Insert the Euroblock plug into a terminal of this device.
Connecting Speaker Cables
The [SPEAKERS] output connectors on the rear panel are barrier strip type connectors. The connections
are described below for two methods: using a spade lug and using a bare conductor.
Caution
• Ensure that load is not applied to the speaker cable.
• This device uses a BTL (Balanced Transformer-Less) connection method for the amplifier output. As the amplifier output
is sent to the positive and negative connectors, any contact with other terminals or the device chassis may lead to
malfunction.
NOTE
Connect the cables so that the amplifier s “+” and “-” symbols match those of the speaker. If they are reversed, the
phase will be reversed and the sound will not be output correctly.
When using a spade lug
Loosen the screw, insert the spade lug all
the way from below, and tighten the screw.
≤5.8mm
(≤0.23”)
≥3.2mm
(≥ 0.13”)
When using a bare conductor
Loosen the screw, wrap the conductor wire around the
barrier strip terminal, and tighten the screw. Be sure that
the bare wire does not touch the chassis.
* Actual size
15mm*
(0.6”)
Speaker cable
Wire
should not
touch the
chassis.
Connecting External Devices
Connect a BGM (background music) tuner, a CD player, a portable audio player, etc. to the stereo input
jacks of this device. After finishing all connections, connect the power co d to an AC outlet.
Warning
When connecting the power cord to an AC outlet, an input signal will turn on the power of this device by the auto-wake
function. To avoid unexpected loud sounds, be sure to connect microphones and external devices with the power off
status.
PA2120 rear panel
RCA
Euroblock
NOTE
Refer to “Attaching Euroblock Plugs” for Euroblock plug installation.
Connecting a Control Panel
Connecting Yamaha Digital Control Panel (DCP1V4S, DCP4
S
, DCP4V4
S
) to PA2120 enables you to control
the volume remotely. You can connect up to two control panels. The total length of the cables from the
PA2120 to the last control panel must not exceed 800 meters in the case of 24AWG.
NOTE
When connecting control panels via DCH8, the total length of the cables to the final cont
ol panel must be less than
200m (according to DCH8 specifications). If you need a longer connection, we ecommend not using the DCH8,
but connecting the devices in a daisy-chain configuration
Precautions when connecting two control panels:
• Connect them in a daisy-chain configuration
• Set the panel IDs separately. (0 or 1)
• Set the second control panel DIP switch 4 to ON. (termination setting)
This setting is only for the second device when connecting two devices.
• Ensure that the total Ethernet cable length does not exceed 800 meters in the case of 24AWG.
1
ON
2 3 4
1
ON
2 3 4
1 2 3
1
1 2 3
0
1 2 3
2
1 2 3
3
1 2 3
4
1 2 3
5
1 2 3
6
1 2 3
7
1
ON
2 3 4
RJ-45
Rear panel
Rear panel
PA2120 rear panel
Ethernet straight cable
(CAT5e or more; 800m or
less (24AWG))
Yamaha Digital Control Panel
Set the DIP switch 4 to
ON (termination setting).
(The second control
panel only if connecting
two devices.)
Sets the panel ID
Sets the panel ID
Panel ID setting for control panel
■
Functions Operated Via the Control Panel
DCP1V4S
Encoder
Switch 3
Switch 4
Volume control
Encoder operation target: SPEAKER A
Encoder operation target: SPEAKER B
DCP4S
Switch 1
Switch 2
Switch 3
Switch 4
Volume up: SPEAKER A
Volume down: SPEAKER A
Volume up: SPEAKER B
Volume down: SPEAKER B
DCP4V4S
Encoder 3
Encoder 4
Volume control: SPEAKER A
Volume control: SPEAKER B
NOTE
• Controls not listed here will not work.
• Settings by using control panels will be retained even if the control panels have been disconnected.
Using the [REMOTE] Connector (Euroblock 3-pin)
You can connect switches to the rear panel [REMOTE] connector, and use them to remotely mute/unmute all
channels, or switch the power standby/on status.
From the left, the [REMOTE] connector consists of M (mute all), S (standby), and G (ground) pins.
The [REMOTE] connector uses a Euroblock plug. For details on how to connect Euroblock plugs, refer to
“Attaching Euroblock Plugs.”
Muting/unmuting all channels
Switching the power standby/on status
Turning mute on
Turning mute off
Switching the power to standby
Turning the power on
NOTE
• When the device is put into standby mode via the [REMOTE] connector, it is not possible to turn the power back
on by pressing the [
z
] button on the front panel, or by the auto-wake function with input signal detection. The
power can only be turned on via the [REMOTE] connector.
• When the device is put into mute mode via the [REMOTE] connector, the [
z
] button will flash in green.
Connections
Appendix
High-Impedance and Low-Impedance Connections
For a high-impedance connection, a speaker transformer that raises the impedance to several hundred or
thousand ohms is added to the speaker system. This allows the speaker system to be effectively driven with
much lower current than is required for a low-impedance connection. Therefore, a large number of speaker
systems can be connected. Even over long distances, there is very little transmission loss due to the cable
resistance being negligible in relation to the impedance of the speaker system. High-impedance speaker
connections usually operate at a specific maximum power amplifier voltage of 100 or 70 volt
The more orthodox low-impedance connection does not use a speaker transformer. The speaker systems
are directly connected to the power amplifier with a rated impedance generally a ound 4 - 16 ohms. For
short distances over which cable resistance is insignificant, low-impedance connections deliver a sound
quality that is superior to high-impedance connections.
The differences between connection methods are explained as follows.
■
Multiple Speaker System Drive Capability
High-Impedance Connections
As long as the total nominal power input rating for all speakers is within the power output capability
of the amplifie , any number of speaker systems can be connected in parallel. The power input rating
is determined by the speaker systems and speaker transformers used. It is also possible to connect
speaker systems that have different input power ratings. In the case of speaker systems that are capable
of changing their input power rating (Yamaha VXC and VXS series, etc.), this can be utilized to vary the
volume of each speaker.
10W
10W
10W
10W
10W
Speaker transformer
70V/100V
Low-Impedance Connections
When connecting multiple low-impedance speaker systems to a single channel, the following methods are
possible.
Parallel Connection
When multiple speaker systems having the same impedance are connected in parallel, the total impedance
becomes the individual speaker system impedance divided by the number of systems connected.
4Ω
Cannot be connected
8Ω
8Ω
8Ω
Total impedance = 4Ω
Serial Connection
When connected in series, the total impedance is simply the sum of the impedances of the speaker
systems connected. However, if one speaker system happens to fail, the electrical signal will not be passed
on and subsequent speaker systems will be affected.
Interruption
Failure
No sound
Total impedance = 8Ω
4Ω
4Ω
Precautions for Rack Mounting
This unit is rated for operation at ambient temperatures ranging from 0 to 40 degrees Celsius. When
mounting the unit with other PA2120 unit(s) or other device(s) in an EIA standard equipment rack, internal
temperatures can exceed the specified upper limit, esulting in impaired performance or failure. When rack
mounting the unit, always observe the following requirements to avoid heat buildup:
• When mounting the unit in a rack with devices such as power amplifiers that generate a significan
amount of heat, leave more than 1U of space between the PA2120 and other equipment. Also either
leave the open spaces uncovered or install appropriate ventilating panels to minimize the possibility of
heat buildup.
• To ensure sufficient ai flo , leave the rear of the rack open and position it at least 10 centimeters from
walls or other surfaces. If the rear of the rack can’t be left open, install a commercially available fan or
similar ventilating option to secure sufficient ai flo . If you’ve installed a fan kit, there may be cases in
which closing the rear of the rack will produce a greater cooling effect. Refer to the rack and/or fan unit
manual for details.
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 to THRU OUT,
20Hz-20kHz
0dB, -2.5dB, +1.0dB
AC Power Requirement
100V, 120V, 230V-240V 50Hz/60Hz (*1)
*1 It has confi med 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 e ficiency: 44% and mo e.
• 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
4.8kg
Included Accessories
AC power cord (2.0m) x1,
3.5mm Euroblock plug (6pin) x1,
3.5mm Euroblock plug (3pin) x1,
Owner’s Manual x1,
Technical Specifications x
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 amaha makes continuous
improvements to the product, this manual may not apply to the specifications of your pa ticular product. To obtain the
latest manual, access the Yamaha website then download the manual file. Since specifications, equipment or separatel
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
ZT16380
