OPERATING INSTRUCTIONS
MULTICHANNEL POWER AMPLIFIERS
DA-250F CU
DA-250FH CU
Note: The figure shows the DA-250F.
Thank you for purchasing TOA's Multichannel Power Amplifier.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
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1. IMPORTANT SAFETY INSTRUCTIONS
• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
• Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer,
or sold with the apparatus. When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-over.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
FCC REQUIREMENTS
Note: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
• This Class A digital apparatus complies with Canadian ICES-003.
• Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
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2. SAFETY PRECAUTIONS
• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe
operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or
cautions regarding safety.
• After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
CAUTION
· If you detect smoke or a strange smell coming
from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of
WARNING
When Installing the Unit
the core, disconnection, etc.)
• Do not expose the unit to rain or an environment
· If it is malfunctioning (no tone sounds.)
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
• To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
• Use the unit only with the voltage specified on the
components inside the unit. Refer all servicing such
unit. Using a voltage higher than that which is
as modification inside the unit to qualified service
specified may result in fire or electric shock.
personnel.
• Do not cut, kink, otherwise damage nor modify the
• Do not place cups, bowls, or other containers of
power supply cord. In addition, avoid using the
liquid or metallic objects on top of the unit. If they
power cord in close proximity to heaters, and never
accidentally spill into the unit, this may cause a fire
place heavy objects -- including the unit itself -- on
or electric shock.
the power cord, as doing so may result in fire or
electric shock.
• Do not insert nor drop metallic objects or
flammable materials in the ventilation slots of the
• Be sure to replace the unit's terminal cover after
unit's cover, as this may result in fire or electric
connection completion. Because the voltage of up
shock.
to 140 V is applied to the high impedance speaker
terminals, never touch these terminals to avoid
electric shock.
• Do not touch a plug during thunder and lightning,
as this may result in electric shock.
• External wiring connected to the terminals marked
with
requires installation by an instructed person.
CAUTION
• The apparatus shall be connected to a mains
socket outlet with a protective earthing connection.
When Installing the Unit
When the Unit is in Use
• Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
• Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest TOA dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock.
• When unplugging the power supply cord, be sure
to grasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged
power supply cord may cause a fire or electric
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shock.
When the Unit is in Use
• When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
• Make sure that all volume controls are set to
minimum position before power is switched on.
Loud noise produced at high volume when power is
switched on can impair hearing.
• Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
• Do not block the ventilation panels on the front.
Doing so may cause heat to build up inside the unit
and result in fire.
• Contact your TOA dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result.
• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
• If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
• To avoid electric shocks, be sure to switch off the
unit's power when connecting speakers.
• The DA-250F and DA-250FH are designed
exclusively to be mounted in an equipment rack.
Be sure to follow the instructions below when rack-
mounting the unit. Failure to do so may cause a fire
or personal injury.
• Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
· Install the equipment rack on a stable, hard floor.
Fix it with anchor bolts or take other
arrangements to prevent it from falling down.
· Be sure to use the screws with a diameter of over
5 mm and length of over 12 mm to mount the
unit.
An all-pole mains switch with a contact
separation of at least 3 mm in each pole shall be
incorporated in the electrical installation of the
building.
· When connecting the unit's power cord to an AC
outlet, use the AC outlet with current capacity
allowable to the unit.
The lighting flash with arrowhead symbol,
within an equilateral triangle, is intended
to alert the user to the presence of
uninsulated "dangerous voltage" within
the product's enclosure that may be of
sufficient magnitude to constitute a risk of
electric shock to persons.
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3. GENERAL DESCRIPTION
TOA's DA-250F and DA-250FH Multichannel Power Amplifiers feature high power handling capabilities and
durability. The DA-250F is configured with 250 W x 4 channels (4 Ω output) and 170 W x 4 channels (8 Ω
output), and the DA-250FH features a 250 W x 4 channels (19.6 Ω output) configuration.
Besides, each model's output is made available for bridge connection, allowing it to be used as a stereo
amplifier of 500 W (8 Ω for DA-250F, 39.2 Ω for DA-250FH) x 2 channels or a 3-channel amplifier of 500 W (8
Ω) + 250 W (4 Ω) x 2 channels for DA-250F, 500 W (39.2 Ω) + 250 W (19.6 Ω) x 2 channels for DA-250FH.
Their wide range of applications include stores and permanent sound systems.
4. FEATURES
• 1U rack mounting size*.
• Low power consumption and light weight.
• An input signal to Channel 1 can be routed to all channels, and the output volume adjusted using the input
volume control for each channel.
• Electronically-balanced inputs.
• Input terminals employ removable terminal blocks to provide maximum connection ease.
• Input/output status LED indicators for each channel.
• Built-in protection circuitry disconnects the output when a short circuit, overload, or unusual temperature rise
occurs.
* 1U size = 44.5 mm (reference size)
5. HANDLING PRECAUTIONS
• Keep the input cable away from the output cable. If installed close to each other, oscillation could occur.
• To avoid unit failures, never connect outputs of two or more units in parallel.
• Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller than specified impedance could cause damage to the unit.
• Periodically clean the filter located inside the ventilation panel on the unit's front panel. If the filter becomes
clogged, heat will become trapped inside the enclosure.
• Install the unit in locations where the temperature is between –10 and +40°C and the moisture is less than
90% (no dew condensation must be formed).
• To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty,
use a cloth damped in a neutral cleanser. Never use benzene, thinner, alcohol, or chemically-treated
cleaning cloth because such volatile liquids could deform or discolor the unit.
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6. INSTALLATION PRECAUTIONS
• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other
equipment.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
To achieve sufficient ventilation, remove all panels on the rear of the rack.
• When mounting the unit in the rack, also mount a Perforated Panel larger than 1U in size*:
(1) at the top and the bottom of the rack, and
(2) above and below every 5 units.
Power amplifiers
DA-250F/250FH
Power amplifiers
DA-250F/250FH
Perforated panel
• Robust structure is one of the unit's main features. However, if the strength is particularly needed when
installing the unit in the rack, use a supporting runner for the safety purposes.
• Rack mounting screws are not supplied with the unit. Be sure to use the screws with a diameter of over 5
mm and length of over 12 mm to mount the unit.
* 1U size = 44.5 mm (reference size)
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7. NOMENCLATURE AND FUNCTIONS
[Front]
3
4
5
2
1
Note: The figure shows the DA-250F.
4. Ventilation panel (Air Vent)
1. Power switch [
ON/
OFF]
A filter is located inside the ventilation panel.
To clean the filter, remove the ventilation panel.
(See p. 15; Cleaning the Filter.)
Power is switched on and off with each
depression of this switch.
2. Power indicator [POWER]
5. Indicators [INPUT, OUTPUT, PEAK, PROTECT]
Lights blue when the power is switched on.
The indicators are as follows from left to right:
3. Input volume controls [CH 1 (BRIDGE 1), CH 2,
CH 3 (BRIDGE 2), CH 4]
• Input indicator [INPUT]
Lights green regardless of the input volume
control setting when an input signal level exceeds
about –20 dB.
Adjust the input volume of each channel.
When a bridge connection is made
• When Channels 1 and 2 are bridge-
connected (BRIDGE 1 ON/OFF button (9) is
set to ON), the CH 1/BRIDGE 1 volume
control adjusts the input volumes of Channels
1 and 2. In this event, the CH 2 volume
control cannot be used.
• When Channels 3 and 4 are bridge-
connected (BRIDGE 2 ON/OFF button (9) is
set to ON), the CH 3/BRIDGE 2 control
adjusts the input volumes of Channels 3 and
4. In this event, the CH 4 volume control
cannot be used.
• Output indicator [OUTPUT]
Lights yellow when an output level exceeds about
1W at an 8 Ω load (DA-250F) or 19.6 Ω load (DA-
250FH).
• Peak indicator [PEAK]
Lights red when an output signal clips (distortion
occurs).
• Protection indicator [PROTECT]
Lights red when the protection circuitry is
activated. (See p. 14; Protection Operation List.)
When the power is switched on, this indicator
lights for about 2 seconds and then extinguishes.
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[Rear]
6
7
8
9
10
11
9
Note: The figure is common to DA-250F and DA-250FH.
6. AC inlet
• 3-channel input mode
Connect the supplied power cord to this inlet.
Set either BRIDGE1 or 2 to ON.
When bridge-connecting Channels 1 and 2, set
BRIDGE1 to ON, and BRIDGE 2 to ON when
bridge-connecting Channels 3 and 4.
7. Functional ground terminal [SIGNAL GND]
Hum noise may be generated when external
equipment is connected to the unit. Connecting
this terminal to the functional ground terminal of
the external equipment may reduce the hum
noise.
• 2-channel input mode
Set both BRIDGE1 and 2 to ON.
Note
Note
Be sure to first turn off the power switch when
This terminal is not for protective ground.
changing the BRIDGE button settings.
8. Speaker output terminals (with a terminal
cover)
10. CH1 mode ON/OFF button [CH 1 TO ALL,
ON/
OFF]
Connect speaker cables to these terminals.
Setting this button to ON (pressed in) transmits
the Channel 1 input signal to all channels. Output
signal levels can be individually adjusted with
each channel's input volume control (3).
9. BRIDGE ON/OFF buttons [BRIDGE1, 2,
ON/
OFF]
Set these buttons to OFF (protruding) in normal
operation. When using the unit in bridge
connection, set either or both buttons to ON
(pressed in) and change speaker terminal wiring.
(See p. 10.)
The unit's input mode changes as follows
depending on the BRIDGE ON/OFF button
setting:
Note
Be sure to first turn off the power switch when
changing the CH 1 mode button settings.
11. Input terminals [INPUTS]
Electronically-balanced inputs of 3P removable
terminal block type.
(H: Hot, C: Cold, E: Earth)
• 4-channel input mode
Set both BRIDGE 1 and 2 buttons to OFF.
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8. CONNECTIONS
8.1. Procedure
Step 1. Switch off the unit's power.
BRIDGE 2
BRIDGE 1
ON/OFF button
ON/OFF button
Step 2. Set the BRIDGE ON/OFF buttons and CH 1 mode
ON/OFF button.
Step 3. Connect the sound source equipment to the Input
terminals.
Note
Refer to p. 12 for the removable terminal plug
connection.
CH 1 mode ON/OFF button
Step 4. Connect speakers to the Speaker output terminals.
4-1. Unscrew the output terminal cover.
4-2. Strip 10 mm of insulative jacket from the end of the
speaker cable, as shown in the figure at right.
4-3. Connect speaker cables to the output terminals.
10 mm
4-4. Replace the output terminal cover in place.
Be sure to replace the unit's terminal cover after connection
completion. Because high voltage is generated at the speaker output
terminals, never touch these terminals to avoid electric shock.
WARNING
8.2. Button Settings and Speaker Connections
[4 inputs - 4 outputs]
Speaker output terminals
CH4 CH3 CH2 CH1
CH1
CH2
CH3
CH4
-
+
-
+
-
+
-
+
Button
Setting
OFF
CH1
CH2
CH3
CH4
BRIDGE 1
BRIDGE 2
CH 1 mode
DA-250F
DA-250FH
OFF
+
4 – 8 Ω
19.6 Ω
OFF
–
+
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
19.6 Ω
19.6 Ω
19.6 Ω
–
+
–
+
–
[1 input - 4 outputs]
Speaker output terminals
CH4 CH3 CH2 CH1
CH1
-
+
-
+
-
+
-
+
Button
Setting
OFF
OFF
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
DA-250F
DA-250FH
CH2
CH3
CH4
+
4 – 8 Ω
19.6 Ω
–
+
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
19.6 Ω
19.6 Ω
19.6 Ω
–
+
–
+
–
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[2 inputs - 2 outputs]
Speaker output terminals
CH1
Button
Setting
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
CH2
-
+
-
+
ON
BRIDGE 2
BRIDGE 1
DA-250F
DA-250FH
OFF
CH3
+
8 – 16 Ω
39.2 Ω
CH3
–
+
CH4
8 – 16 Ω
39.2 Ω
–
[1 input - 2 outputs]
Speaker output terminals
CH1
Button
Setting
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
CH2
CH3
CH4
-
+
-
+
BRIDGE 2
BRIDGE 1
ON
DA-250F
DA-250FH
ON
+
8 – 16 Ω
39.2 Ω
–
+
8 – 16 Ω
39.2 Ω
–
[3 inputs - 3 outputs (1)]
Speaker output terminals
CH2 CH1
CH1
-
+
-
+
Button
Setting
OFF
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
DA-250F
DA-250FH
CH2
-
+
+
BRIDGE 2
CH2
4 – 8 Ω
19.6 Ω
OFF
–
+
CH3
4 – 8 Ω
19.6 Ω
CH3
–
+
CH4
8 – 16 Ω
39.2 Ω
–
[3 inputs - 3 outputs (2)]
Speaker output terminals
CH4 CH3
-
+
-
+
CH1
Button
Setting
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
CH2
-
+
OFF
OFF
BRIDGE 1
DA-250F
DA-250FH
CH3
+
CH3
8 – 16 Ω
39.2 Ω
–
+
CH4
CH4
4 – 8 Ω
19.6 Ω
–
+
4 – 8 Ω
19.6 Ω
–
[1 input - 3 outputs (1)]
Speaker output terminals
CH2 CH1
CH1
-
+
-
+
Button
Setting
OFF
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
DA-250F
DA-250FH
CH2
CH3
CH4
-
+
BRIDGE 2
+
4 – 8 Ω
19.6 Ω
ON
–
+
4 – 8 Ω
19.6 Ω
–
+
8 – 16 Ω
39.2 Ω
–
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[1 input - 3 outputs (2)]
Speaker output terminals
CH4 CH3
-
+
-
+
CH1
Button
Setting
ON
CH1
BRIDGE 1
BRIDGE 2
CH 1 mode
CH2
CH3
CH4
-
+
OFF
ON
BRIDGE 1
DA-250F
DA-250FH
+
8 – 16 Ω
4 – 8 Ω
4 – 8 Ω
39.2 Ω
–
+
19.6 Ω
–
+
19.6 Ω
–
9. REMOVABLE TERMINAL PLUG CONNECTION
Cautions
• Be sure to use shielded cables for audio signal lines.
• Avoid soldering cable conductor, as contact resistance may increase when the cable is tightened and the
solder is crushed, possibly resulting in an excessive rise in joint temperatures.
• Use cables of AWG 12 – 24.
Cable end treatment
Shielded cable
7 mm
20 mm
Connector connections
Slotted screwdriver
Step 1. Loosen the terminal screw, then insert the
Tightens
cable.
Loosens
2
1
Step 2. Retighten the terminal screw. (Pull on the
cable to ensure it is securely connected.)
Terminal screw
1
Hot
Removable terminal plug
Earth
Cold
Shielded cable
Tip
Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm in width
Bit shape 3 mm
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10. INPUT SENSITIVITY AND HIGH-PASS FILTER ON/OFF SETTINGS
The Input sensitivity can be set to +4 dB (factory-preset) or -10 dB for each channel.
Besides, only the DA-250FH employs the High-pass filter on each channel, which can be set to "ON" or
"OFF."
CAUTION
These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to do
so. Refer all servicing to qualified service personnel.
Step 1. Detach the top cover of the unit.
Step 2. Change the jumper socket position to "+4 dB" or "–10 dB" for the Input sensitivity, and to "ON" or
"OFF" for the High-pass filter (DA-250FH only) as illustrated below.
High-pass filter setting (DA-250FH only)
[When set to ON]
[When set to OFF]
Jumper socket
Jumper socket
(Factory-preset)
DA-250F/250FH
(Viewed from top with the
top cover detached.)
Front panel
Input sensitivity setting
[When set to +4 dB]
Jumper socket
[When set to –10 dB]
Jumper socket
(Factory-preset)
Note
To operate the unit in bridge connection, perform the same setting for the channels to be used
(Channels 1 and 2, Channels 3 and 4, or all channels).
Operating the unit with the different setting may cause unit failure.
Step 3. Replace the detached top cover.
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11. PROTECTION OPERATION LIST
Failure
Protection
Operation Indicator
Remedy
Recovery
Overcurrent due Current limiter activated Peak indicator lights. Remove overload.
Connecting a correct load
automatically restores
normal operation.
to overload
Short circuit
when impedance drops
below the specified
value.
Current limiter activated. Protection indicator
Check speakers and
lines for short circuit.
Turn off the power switch.
Correct the load, then
switch on the power.
Load is disconnected.
lights.
Rise in heat sink Load disconnected.
temperature
(over 110°C)
Protection indicator
lights.
Check the unit for
correct ventilation and returns to normal when
overload. the temperature decreases.
Operation automatically
Temperature rise Built-in amplifier unit
Four indicators of
the corresponding
channel extinguish.
inside the unit
that caused the failure
halted.
(over 80°C)
Abnormal DC
voltage output
Load disconnected.
Protection indicator
lights.
Contact the TOA dealer where the unit was
purchased.
12. VOLUME CONTROL CAP ATTACHMENT
To protect the input volume control from accidental operation, it is recommended to replace the control knob
with the supplied volume control cap as illustrated.
Input volume control
Volume control cap (supplied)
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13. CLEANING THE FILTER
Step 1. Switch off the unit's power.
Step 2. Remove the ventilation panel as shown in the figure.
Step 3. Detach the filter inside the ventilation panel.
Step 4. Clear the filter of dust.
Step 5. Replace the filter and ventilation panel.
2
Ventilation Panel
Detach the panel by pressing on the left and right sides.
3
Filter
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14. BLOCK DIAGRAMS
14.1. DA-250F
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14.2. DA-250FH
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15. DIMENSIONAL DIAGRAM
Unit: mm
465
482
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16. SPECIFICATIONS
Model
DA-250F CU
DA-250FH CU
Power Source
Power Consumption
120 V AC, 50/60 Hz
200 W (at 1/8 rated output x 4 channels)
4 channels: 250 W x 4 (4 Ω), 4 channels: 250 W x 4 (19.6 Ω)
Output
170 W x 4 (8 Ω)
2 channels (bridge connection):
500 W x 2 (8 Ω)
2 channels (bridge connection):
500 W x 2 (39.2 Ω)
Frequency Response
20 Hz – 20 kHz ( 1 dB)
50 Hz – 20 kHz (–3 dB, +0 dB) (HPF ON)
20 Hz – 20 kHz ( 1 dB) (HPF OFF)
0.15% (1 kHz)
Total Harmonic
Distortion
0.15% (1 kHz)
0.3% (20 Hz – 20 kHz)
0.3% (100 Hz – 20 kHz) (HPF ON)
0.3% (20 Hz – 20 kHz) (HPF OFF)
Input Sensitivity
Input Impedance
S/N Ratio
+4 dB* (1.23 V) / –10 dB* (0.24 V) (selectable with the inner jumper)
electronically-balanced
10 kΩ (
100 dB
)
Connection
Terminal
Input (CH 1 – 4): Removable terminal block
Output:
M4 screw terminal
AC inlet
Power input:
Indicator
Power indicator x 1 (blue), Input indicator x 4 (green), Output indicator x 4 (yellow)
Peak indicator x 4 (red), Protection indicator x 4 (red)
–10 to +40°C
Operating Temperature
Humidity
90 % or less (no dew condensation must be formed.)
Front panel: Aluminum, alumite process, black
482. (w) x 44 (h) x 400 (d) mm
Finish
Dimensions
Weight
6.6 kg
* 0 dB = 0.775 Vrms
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Power cord (2 m) ................................................................. 1
Removable terminal plug (3P) ............................................. 4
Volume control cap .............................................................. 4
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Printed in Japan
133-22-027-00
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