Toa IP-450D User manual

OPERATING INSTRUCTIONS
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
1. SAFETY PRECAUTIONS ........................... 2
2. GENERAL DESCRIPTION ......................... 4
3. FEATURES ................................................. 4
4. HANDLING PRECAUTIONS ...................... 4
5. NOMENCLATURE AND FUNCTIONS
Front panel .................................................. 5
Rear panel ................................................... 6
6. INSTALLATION .......................................... 7
7. CONNECTIONS .......................................... 8
8. CLEANING THE FILTER ............................ 9
9. REMOVING THE HANDLE ......................... 9
10. BLOCK DIAGRAM ................................... 10
11. TABLE FOR PROTECTION CIRCUIT
ACTIONS .................................................. 11
12. APPEARANCE AND DIMENSIONS ......... 11
13. SPECIFICATIONS .................................... 12
TABLE OF CONTENTS
IP Series
DUAL POWER AMPLIFIERS IP-600D
IP-450D
IP-300D

2
1. SAFETY PRECAUTIONS
• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
• We also recommend you keep this instruction 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 so you are
thoroughly aware of the potential safety hazards as well as understand the safety symbols and messages.
WARNING
Indicates a potentially hazardous situation which, if mishandled,
could result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled,
could result in moderate or minor personal injury, and/or proper
damage.
WARNING
CAUTION
When Installing the Unit
• Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
• Use the unit only with the voltage specified on the
unit. Using a voltage higher than that which is
specified may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock.
• Be sure to replace the unit's terminal cover after
connection completion. Because the voltage of up
to 100 V is applied to the output terminals, never
touch these terminals to avoid electric shock.
• Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down and causing personal injury and/or property
damage.
• Install the unit only in a location that can
structurally support the weight of the unit and the
mounting bracket. Doing otherwise may result in
the unit falling down and causing personal injury
and/or property damage.
When the Unit is in Use
• To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
your nearest TOA dealer.
• Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.
• Do not insert nor drop metallic objects or
flammable materials in the ventilation slots of the
unit's cover, as this may result in fire or electric
shock.
• Do not touch a plug during thunder and lightning,
as this may result in 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.
· 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
the core, disconnection, etc.)
· If it is malfunctioning (no tone sounds.)

3
When Installing the Unit
• Never plug in nor remove the power supply plug
with wet hands, as doing so may cause 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
shock.
• 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.
• Do not block the ventilation slots in the unit's cover.
Doing so may cause heat to build up inside the unit
and result in fire.
• 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.
• When unpacking or moving the unit, be sure to
handle the unit with two or more persons. Falling or
dropping the unit may cause personal injury and/or
property damage.
When the Unit is in Use
• Do not place heavy objects on the unit as this may
cause it to fall or break which may result in
personal injury and/or property damage. In
addition, the object itself may fall off and cause
injury and/or damage.
• Make sure that the volume control is 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 speaker 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.
• 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.
• 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.
• 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. A fire or electric shock may result.
CAUTION

4
2. GENERAL DESCRIPTION
TOA's IP series dual power amplifiers feature high durability, high quality sound and high output power (IP-
300D: 300 W, IP-450D: 450 W, IP-600D: 600 W - when a 4 Ωload connected). Input/output levels and other
functions can be remotely controlled from external equipment. (An interface unit is required. For details,
contact your TOA dealer.) The amplifier is ideal for use in store sound systems, permanently-installed sound
systems, and other sound systems.
3. FEATURES
• Small in size (2-rack unit size) and light in weight.
• Ensures a high degree of safety by largely reducing the rush current which flows when the power is switched
on.
• Variable forced-air cooling system changes the speed of a fan as the heat sink temperature varies, keeping
fan operation noise low.
• Three different output modes are made available for selection: Stereo, BTL and parallel outputs. In parallel
mode, the input level of each channel can be set independently.
• An internal limiter limits the current during overload, and a protection circuit disconnects the output during an
output short circuit by detecting the levels of both voltage and current. The protection circuit also disconnects
the output during an abnormal temperature rise.
• Large output screw terminals (10 mm in width) allow connection of solderless terminals with diameter of 9.5
mm. Because two of each of positive (+) and negative (–) terminals are provided, even the four-core speaker
cables can be connected.
• Control I/O terminal. Input and output levels can be remotely controlled or monitored from external
equipment. (An interface unit is required. For details, contact your TOA dealer.)
• Detachable carrying handles even after the unit is installed in a rack.
• Pushlock volume controls prevent accidental setting changes after installation.
• An AC inlet simplifies the system maintenance after installation.
4. HANDLING PRECAUTIONS
• Line Source: 230 VAC ±10%, 50/60 Hz
Never connect the AC power cord to any other line voltage than that specifically designated.
• To avoid oscillation, keep the input cable away from the output cable. Particular care must be exercised
when mounting the unit in an equipment rack.
• In some installations, a ground loop is formed and such noise as hum may be generated. In such cases, cut
the loop by removing a shorting metal piece attached to the ground terminals on the rear panel. The noise
can be reduced.
• These power amplifiers have a filter in their front panel. Clean the filter as frequently as possible. If it
becomes clogged, heat cannot escape from the inside of the unit.
• Never connect two amplifier outputs in parallel under any circumstances.

5
5. NOMENCLATURE AND FUNCTIONS
[ Front panel ]
23 34 45 58 8
16 67 7
Power switch
Power is switched on ( ) and off ( ) with each
depression of this switch.
Power indicator lamp
Lights green when the power is switched on.
Signal indicator lamp
Lights green regardless of the input level control
setting when there is an input of a signal with a level
exceeding –30 dB.
Peak indicator lamp
Lights red if an output signal clips (distortion occurs).
Protection circuit indicator lamp
Lights red for three seconds after the power is supplied
to the unit, and then goes out. This lamp also lights red
when a protection circuit is activated. Refer to p.11
"Table for protection circuit actions" for details.
Level control bypass indicator lamp
Lights yellow when the level control switch (refer to
p.6) is in the ON position. While this lamp remains lit,
the input level control cannot be used because it is
bypassed.
Input level control (pushlock type)
Clicks at each dB mark on the scale when rotated. This
knob is recessed to avoid accidental setting changes.
Pressing on the knob raises it above the front panel to
permit level adjustment.
[Precautions]
When the level control switch on the rear panel is set to
ON, the input volume control cannot be used because
it is bypassed.
Carrying handle
Can be detached. Refer to p.9 when removing.
8
7
11
6
5
4
3
2
1

Power Input terminal
Electrically-balanced input terminals. The XLR
connector is connected in parallel with a balanced
phone jack.
•XLR connector
Pin No.1: GROUND
No.2: HOT
No.3: COLD
•Balanced phone jack
T (Tip): HOT R (Ring): COLD S(Sleeve): GROUND
Output mode selector switch
Selects STEREO, BTL or PARALLEL mode.
•STEREO mode
Channels 1 and 2 are operated independently. (The
unit functions as a normal stereo amplifier.) Channel
1 input signal goes to Channel 1 output, and
Channel 2 input signal goes to Channel 2 output.
•BTL mode
The unit functions as a monaural amplifier with 1
input and 1 output. Channel 1 input signal goes to
both output BTL (+) and (–) terminals.
•PARALLEL mode
The unit functions as a monaural amplifier with 1
input and 2 outputs. Channel 1 input signal goes to
the outputs of both Channels 1 and 2. Input signal
levels of channels 1 and 2 can be set independently.
[Precautions]
Use only Channel 1 input terminal when in BTL or
PARALLEL mode. Do not use Channel 2 input terminal.
Confirm the position of the output mode selector switch
before switching on the power. Be sure to switch off the
power when changing mode switch settings.
Level control switch
Usually, set this switch to OFF. When an interface unit
is connected, shifting this switch to ON permits external
input level adjustment.
[Precautions]
No sound is output if the level control switch is set to
ON without connecting an interface unit. Confirm the
switch position before switching on the power. Be sure
to switch off the power when changing control switch
settings.
Control I/O terminal
Connects to an interface unit when monitoring or
performing remote controls from external equipment.
For details, contact your TOA dealer.
[Precautions]
No other unit other than an interface unit must be
connected to the terminal. Be sure to switch off the
power when connecting an interface unit.
Output terminal (with a protection cover)
Connect speaker cables to these terminals. Because
the upper terminals are connected in parallel with the
lower terminals, both terminals can be used
simultaneously. Refer to p.8 for speaker cable
connections.
[Precautions]
Be sure to switch off the power when connecting the
speaker cables. Never connect two amplifier outputs in
parallel under any circumstances.
Grounding terminal for signals
When the power amplifier is connected to other
equipment, grounding sometimes creates a loop,
producing hum noise. This loop can be cut and noise
reduced by removing a shorting metal piece connecting
two terminals.
AC inlet
Cord hanger
16
15
14
13
12
11
10
9
6
[ Rear panel ]
9 911121112 14
10 131516 16
21
3
12
3
T
R
S
TR S
Phone plugPhone jack

7
6. INSTALLATION
•Carefully note heat radiation when installing the unit. These power amplifiers are equipped with a cooling
fan. To avoid heat buildup, ensure that the rear of the unit is at least 10 cm away from the wall surface.
•When mounting the unit in the rack, the inside of the rack must be well ventilated. To accomplish this, keep
the rear side of rack open (no panel is mounted), and mount a ventilation panel of over 1-unit size in the
uppermost and lowermost rack positions on the rack front.
•When installing in the rack, be sure to mount a perforated panel of over 1-unit size for four amplifiers. See
the figure below.
•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 the supporting runner YA-706 (option) for the safety purposes.
Front
Over 10 cm

8
7. CONNECTIONS
CH2 CH1
STEREO PARALLEL
BTL
Output mode switch Output terminal
STEREO PARALLEL
BTL
Output mode switch
CH2 CH1
Output terminal
BTL
STEREO PARALLEL
BTL
Output mode switch Output terminal
Power amplifier Output transformer (option)
IP-600D MT-600M
IP-450D MT-450M
IP-300D MT-300M
CH1
CH1
CH2
CH2
CH1
CH1
CH2
CH1
CH1
CH2
1. Switch off the amplifier power.
2. Unscrew the output terminal cover.
3. Connect speaker cables to the output terminals.
4. Fit the output terminal cover in place.
[Precautions] Be sure to fit the output terminal cover in place.
Refer to the figures below for connections for each output mode.
Since the upper output terminals are connected in parallel with the lower terminals, both terminals can be
used simultaneously.
•STEREO mode
•BTL mode
•PARALLEL mode
[Precautions] The total impedance of the connected speakers must be over 4 Ω(STEREO and PARALLEL
modes) or over 8 Ω(BTL mode). If the impedance of the connected speakers is smaller than
those stated above, equipment failures may result.
Refer to the table at right when using
an optional output transformer.
[Precautions] Do not connect the output transformer under any circumstances when in BTL mode. Both the
amplifier and transformer may fail.
WARNING
The TERMINALS marked with the symbol are HAZARDOUS LIVE.
The external wiring to these terminals requires installation by an INSTRUCTED PERSON.

9
1. Switch off the amplifier power.
2. Remove the handle cover.
3. Remove two screws holding the handle to the amplifier.
4. Remove the handle.
5. Install the supplied screws (M4 x 20).
6. Attach the handle cover to the unit.
1. Switch off the amplifier power.
2. Pull the filter from the front panel as shown in the figure.
3. Clean the filter.
4. Fit the filter in place.
[Precautions] Make sure that the fan is turned off when removing the filter.
8. CLEANING THE FILTER
Handle cover
9. REMOVING THE HANDLE
Filter
Handle
Handle cover

10
PROTECTION CIRCUIT
VI LIMITER
SHORT DETECTOR
PROTECTION CIRCUIT
HEAT SINK TEMPERATURE SENSOR
CH2 POWER AMP CIRCUIT
SIGNAL PEAK
PROTECT
VR BYPASS
CONTROL I/O
HEAT SINK TEMPERATURE SENSOR
VI LIMITER
SHORT DETECTOR
CH1 POWER AMP CIRCUIT
POWER
SIGNAL PEAK
PROTECT
VR BYPASS
CONTROL I/O
ATT OFF
ON
ATT
OFF
ON
VR CONTROL
STEREO
PARALLEL
BTL
STEREO
PARALLEL
BTL
CH1 OUTPUT CH2 OUTPUT
SG
FG
CHANNEL 1 CHANNEL 2
VR CONTROL
10. BLOCK DIAGRAM

11
1818
482 410
102.4
88.4
10
372
473.5
34
Unit: mm
Symptom
Excessive current flow
due to overload
Short circuit (under 0.5 Ω)
Heat sink temperature rise
(Over 95°C)
Unusual DC voltage output
Action
Current limiter operates
when load resistance is
under 2.5 Ω(STEREO/
PARALLEL) or 5 Ω
(BTL).
Current limiter operates.
Speaker loads cut by
output relay.
Speaker loads cut by
output relay.
Speaker loads cut by
output relay.
Indicator
Peak indicator lights.
Protection circuit
indicator lights.
Protection circuit
indicator lights.
Protection circuit
indicator lights.
Remedy
Remove overload.
Check short circuit of
speakers and lines.
Check ventilation and
overload.
Contact your TOA
dealer.
Reset
Automatically reset if 4 Ω
(STEREO/ PARALLEL) or
8 Ω(BTL) load is
connected .
Switch power off, connect
correct load, and switch
power on.
Automatically reset if
temperature drops.
Switch power off, then
remove cause.
11. TABLE FOR PROTECTION CIRCUIT ACTIONS
12. APPEARANCE AND DIMENSIONS

13. SPECIFICATIONS
Printed in Japan
133-12-645-1A
• Accessories
Fiber washer ................................................. 4
Screw 5 x 20 ................................................ 4
Screw M4 x 20 ............................................. 4
Power cord (2 m) .......................................... 1
Instruction manual ........................................ 1
IP-300D IP-450D IP-600D
300 W 450 W 600 W
200 W 300 W 400 W
600 W 900 W 1200 W
20 Hz –20 kHz (+0 dB, –0.5 dB)
0.01%
0.1%
+ 2.2 dB (1.00 V) ±0.5 dB + 4.0 dB (1.23 V) ±0.5 dB + 5.3 dB (1.42 V) ±0.5 dB
32 dB
10 kΩ(electrically-balanced)
110 dB
Under 40°C : Stop
40°C –75°C : Low to high speed (variable)
Over 75°C : High speed
Input (CH1, CH2) : XLR-3-31, XLR-3-32, balanced phone jack
Output : Terminal with screw/washer assembly
CONTROL I/O : 8P DIN
Power supply : AC inlet
POWER (green), SIGNAL x 2 (green), PEAK x 2 (red), PROTECT x 2 (red), VR BYPASS x 2 (yellow)
230 VAC ±10%, 50/60 Hz
430 VA 660 VA 940 VA
1200 VA 1800 VA 2400 VA
Panel : Zinc diecasting, black paint
Case : Colored steel plate, black
482 (w) x 102.4 (h) x 473.5 (d) mm
13 kg 18 kg
Model No.
Output 20 Hz –20 kHz
STEREO RL=4 Ω
RL=8 Ω
BTL RL=8 Ω
Frequency Response
Total Harmonic Distortion
8 Ω, 1 kHz
8 Ω, 20 Hz –20 kHz
Input Sensitivity
(8 Ω, input level control in maximum position)
Voltage Gain
Input Impedance
Signal-to-Noise Ratio
20 Hz –20 kHz
Cooling Fan Speed
Connection Terminal
Indicator
Power Source
Power Consumption
Based on UL/CSA standards
4 Ω, rated output
Finish
Dimensions
Weight
[Notes]
•0 dB = 0.775 Vrms
•The above specifications are subject to change without notice.