Yamaha A100 User Manual [en, de, fr]
YAM AH A
POWER AMPLIFIER
AMPLIFICATEUR DE PUISSANCE
LE ISTU NGSVERSTÄRKE R
Operation Manual
Manuel d'instructions
Bedienungsanleitung
POWER AMPLIFIER
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______
POWER ON
C J a
0 5 10 15 20 25 30 50 80
\\Ww\ili/////////
-20 to 53 10 3 5 +
wWW I N//A///
OUTPUT LEVEL
S0W+50W into 6 ohms ZOHz-aOkHz
MAXIMUM VOLTAGE GAIN 38. 2<iB
PEAK POWER/WATTSCen) 0 5 10 15 20 26 30 50 80
\\Ww\ili/////////
PEAK LEVEL/0ECIBELS
CLIP
□
- 20 10 5 3 1 0 3 6 ■ <
\^\\Uu/zZ^y
CLIP
□
OUTPUT LEVEL
• Explanation of Graphical Symbols
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The lightning flash with arrowhead symbol, within
//\
an equilateral triangle, is intended to alert you to
T \ the presence of uninsulated “dangerous voltage”
* \ within the product’s enclosure that may be of suffi
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL
cient magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral tri
angle is intended to alert you to the presence of
important operating and maintenace (servicing) in
structions in the literature accompanying the appli
ance.
WARNING ' ;
To reduce the risk of fire or electric shock, do not expose this appliance to rain oi^ moisture.
SAFETY INSTRUCTIONS (PREPARED IN ACCORDANCE WITH UL STANDARD 1270)
1 Read Instructions - All the safety and operating in
structions should be read before the appliance is oper
ated.
2 Retain Instructions - The safety and operating in
structions should be retained for future reference.
3 Heed Warnings - All warnings on the appliance and
in the operating instructions should be adhered to.
4 Follow Instructions - All operating and use instruc
tions should be followed.
5 Water and Moisture - The appliance should not be
used near water - for example, near a bathtub, wash
bowl, kitchen sink, laundry tub, in a wet basement, or
near a swimming pool, and the like.
6 Carts and Stands - The appliance should be used
only with a cart or stand that is recommended by the
manufacturer.
6A An appliance and cart combi
nation should be moved with care.
Quick stops, excessive force, and
uneven surfaces may cause the
appliance and cart combination to
overturn.
7 Wall or Ceiling Mounting - The appliance should be
mounted to a wall or ceiling only as recommended by the
manufacturer.
8 Ventilation - The appliance should be situated so
that its location or position does not interfere with its
proper ventilation. For example, the appliance should not
be situated on a bed, sofa, rug, or similar surface, that
9 Heat - The appliance should be situated away from
heat sources such as radiators, heat registers, stoves, or
other appliances (including amplifiers) that produce heat.
10 Power Sources - The appliance should be con
nected to a power supply only of the type described in
the operating instructions or as marked on the appliance.
11 Power-Cord Protection - Power-supply cords should
be routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying
particular attention to cords at piugs, convenience recep
tacles, and the point where they exit from the appliance.
12 Cleaning - The appliance should be cleaned only as
recommended by the manufacturer.
13 Nonuse Periods - The power cord of the appliance
should be unplugged from the outlet when left unused for
a long period of time.
14 Object and Liquid Entry - Care should be taken so
that objects do not fall and liquids are not spilled into the
enclosure through openings.
15 Damage Requiring Service - The appliance should
be serviced by qualified service personnel when:
A. The power-supply cord or the plug has been
B.
C.
D.
E.
may block the ventilation openings; or, placed in a built-
in installation, such as a bookcase or cabinet that may
impede the flow of air through the ventilation openings.
16 Servicing - The user should not attempt to service
the appliance beyond that described in the operating in
structions. All other servicing should be referred to quali
fied service personnel.
dameged; or
Objects have fallen,or liquid has been spilled into
the appliance; or
The appliance has been exposed to rain; or
The appliance does not appear to operate nor
mally or exhibits a marked change in perform
ance; or
The appliance has been dropped, or the enclo
sure damaged.
POWER AMPLIFIER
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INTRODUCTION
Thank you for purchasing the YAMAHA A100 Power Amplifier.
The A100 is a high quality amplifier featuring large VU meters.
It's power output is rated at BOW + BOW (stereo, into 8 Ohm )
or, when used in a monaural configuration, 100W (BTL connec
tion, into 16 Ohm). ’ •
In order to obtain optimum performance from your new A100
and to ensure its proper operation for listening enjoyment for
years to come, please read this Operation Manual thoroughly
before use.
CONTENTS
....
FEATURES
PRECAUTIONS ....................
SPECIFICATIONS
NAMES AND FUNCTIONS OF PARTS . . . .5/6
SYSTEM EXAMPLES
DIMENSIONS
BLOCK DIAGRAM
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3
....
3
....
4
....7/8
....
9
.. . .10
FEATURES
• High power output of 50W + BOW (stereo, into 8 Ohm) or, when used in a
monaural configuration, 100W (BTL connection, into 16 Ohm).
• High quality VU level meters (with clipping indicators).
• PHONES jack allows monitoring of output using stereo headphones.
• The compact, lightweight half-rack 2U size design means the A100 takes up little
space and is easy to carry.
PRECAUTIONS
• Avoid using the unit in locations like the following to prevent damage or trouble.
* Places subject to direct sunlight, near heating devices, etc.
* Places with extreme temperatures.
* Excessively humid or dusty places.
* Places subject to strong vibration.
• Do not apply force to switches and knobs.
• Do not open the case or tamper with the internal circuitry to prevent damage and
the danger of electric jolts.
• When moving the amplifier be sure to unplug the AC power cord as well as all
other connecting cables.
• Do not use benzine, thinner or solvents for cleaning the unit, and avoid spraying
aerosol-type insecticides near it (they may cause discoloration, etc.)
• Make sure that the power supply voltage specified on the rear panel matches your
local AC power supply. Also make sure than the AC power supply can deliver
more than enough current to handle all equipment used in your system.
• After reading this Operation Manual, keep it in a safe place.
SPECIFICATIONS
POWER AMPLIFIER
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Input jacks:
Output connectors:
Functions:
Rated output:
Input sensitivity:
Voltage gain:
Frequency response:
Power bandwidth:
Total harmonic distortion:
intermodulation distortion:
Channel separation:
Signal to noise ratio:
Residual noise:
Slew rate:
Damping factor:
Input impedance:
Power requirement:
Power consumption:
Dimensions (W x FI x D):
Weight:
Standard Accessory:
Pin jack X 1/ch, Phone jack x 1/ch
4P push terminals
POWER switch, OUTPUT LEVEL controls, Level meters,
CLIP indicators, MODE switch (ST/MONO)
BOW + BOW (stereo, 1 % THD, 8 Ohm)
100W (BTL mono, 1% THD, 16 Ohm)
-10 dB (24B mV), (1 kHz,^B0W/8 Ohm, vol. max.)
38.2 dB (1 kHz, input-10 dB) ,
20 Hz — 20 kHz (0 + O.B dB)
10 Hz — BO kHz (0.2% THD, 2BW/8 Ohm)
0.02% (1 kHz, 2BW/8 Ohm, stereo)
0.2% (20 Hz — 20 kHz, 2BW/8 Ohm, stereo)
0.2% (70 Hz : 7 kHz = 4 : 1, 2BW/8 Ohm, stereo)
70 dB (1 kHz), 60 dB (20 Hz — 10 kHz)
10B dB (input shorted, IHF A)
-77 dB (vol. min., IHF A)
10 V/|j.sec. (full swing, 8 Ohm, stereo)
Grater 70 (1 kHz/8 Ohm), grater 60 (20 Hz — 20 kHz, 8
Ohm)
Grater 7.B kOhm
U.S Model: AC 120 V 60 Hz
General Model: AC 220/240 V BO/60 Hz
U.S Model: 120 W
General Model: 120 W
220 X 96 X 296 mm
(8-11/16" X 3-3/4" X 11-B/8")
4.6 kg (10 lbs. 2 oz)
Operation manual
0 dB = 0.77B V rms
Specifications and design are subject to change without notice.
4
NAMES AND FUNCTIONS OF PARTS
Power switch (POWER) and indicator
When the switch is in the ON position the POWER indicator and level
meter lamp light. No sound is heard from the speakers for a few seconds after
the power is turned on while the protection circuitry is operating.
Headphone jack (PHONES)
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To monitor amplifier output, plug stereo headphones into this jack. Output to the
speakers is cut off when headphones are plugged into the jack.
* If the MODE switch (on the rear panel) is set to MONO, inverted phase sound
will be heard from headphones plugged into the PHONES jack. Do not use
headphones with the A100 with the MODE switch set to MONO.
Ou^ut level controls (OUTPUT LEVEL)
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Use*this knobs to adjust the level of the input (output) signal. Turn towards the
"10" indication to increase the level.
* In a monaural (BTL) configuration, the level is controlled using the channel A
knob.
* You can usually leave the knobs in the "10" position and use the mixer or
preamplifier volume control to adjust the volume.
Output level meters
These VU type level meters display the output level. The meters are calibrated to
display both the output wattage with a speaker impedance of 8 Ohm and the
output level in decibels. (OdB shows 25W into 8 Ohm)
In case of MONO-operation both meters show the same output level.
Clipping indicators (CLIP)
0
These indicators light if the input level is excessive or if the speaker impedance
drops too low.
POWER AMPLIFIER
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( Rear Panel )
These jacks are used to connect a mixer or preamplifier to the A100. Connect to
either phone or the pin jacks, as appropriate. If both phone and pin jacks are
connected together, the signal fronh the phone jacks takes precedence.
* In a monaural (BTL) configuration, use the CH A jacks only.
(U.S Model)
e Mode switch (MODE ST/MONO)
Use this switch to select either stereo or monaural operation. The A100 becomes
a monaural power amplifier with a rated output of 10OW (into 16 Ohm) when the
switch is in the MONO position.
Speaker terminals (SPEAKER CH A, B)
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Connect the speakers to these terminals. When using the A100 as a stereo
power amplifier, connect speakers to both the CH A and CH B terminals. Be
careful not to reverse the polarity (+"), (-) at either the amplifier of speaker end
when making connections. Speakers with a rated impedance between 8 Ohm
and 16 Ohm should be used when the A100 is used as a stereo amplifier. When
using the A100 as a monaural amplifier, connect the speaker's (+) terminal to the
CH A (+) terminal and the (-) terminal to the CH B (+) terminal. Speakers with a
rated impedance between 16 Ohm and 32 Ohm should be used when the A100
is used in a monaural configuration.
To connect the speaker cables, check the polarity (+), (-) once again, then, while
pressing the terminal lever with your finger, insert the exposed conductor portion
of the cable Into the hole in the terminal and release the lever.
O AC power cord
Plug this power cord into an AC outlet. (Power requirements match local AC
voltage and frequency in area where sold.)
6
SYSTEM EXAMPLES
1. Stereo connection
S100
S100
2. Monaural connection
Since the YAMAHA speakers SI 00 are 8 Ohm
speakers never use them for monaural connection.
POWER AMPLIFIER
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8
DIMENSIONS
UNIT = mm (inch)
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