OPERATING INSTRUCTIONS
MULTICHANNEL POWER AMPLIFIERS
DA-550F CE
DA-500FH CE
Note: The figure shows the DA-550F.
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.
TABLE OF CONTENTS |
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1. |
SAFETY PRECAUTIONS ............................................................................... |
3 |
2. |
GENERAL DESCRIPTION ............................................................................. |
4 |
3. |
FEATURES .......................................................................................................... |
4 |
4. |
HANDLING PRECAUTIONS .......................................................................... |
5 |
5. |
INSTALLATION PRECAUTIONS ................................................................. |
5 |
6. |
NOMENCLATURE AND FUNCTIONS |
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Front ......................................................................................................................... |
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Rear .......................................................................................................................... |
7 |
7. |
SETTINGS AND CONNECTIONS |
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7.1. Switch Settings and Speaker Connections |
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7.1.1. When using the DA-550F ......................................................................... |
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7.1.2. When using the DA-500FH .................................................................... |
10 |
8. |
REMOVABLE TERMINAL PLUG CONNECTION .................................. |
11 |
9. |
INPUT SENSITIVITY SETTING .................................................................... |
12 |
10. PROTECTION OPERATION LIST ............................................................... |
12 |
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11. TAMPER-PROOF CAP ATTACHMENT .................................................... |
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12. CLEANING THE FILTER ................................................................................ |
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13. DIMENSIONAL DIAGRAM ............................................................................ |
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14. BLOCK DIAGRAMS |
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14.1. DA-550F ......................................................................................................... |
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14.2. DA-500FH ...................................................................................................... |
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15. HOW TO USE THE CONTROL/MONITOR TERMINALS |
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15.1. Control Terminal (Input) ................................................................................. |
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15.2. Monitor Terminal (Output) .............................................................................. |
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15.3. About Pin 7 of the Control/Monitor Terminals ................................................ |
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15.4. Terminal Pin Arrangement ............................................................................. |
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15.5. Connection Cable and Maximum Cable Length ............................................. |
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15.6. RJ45 Connector's Pin Arrangement and Cable Color Codes ........................ |
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16. SPECIFICATIONS |
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16.1. DA-550F CE ................................................................................................... |
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16.2. DA-500FH CE ................................................................................................ |
19 |
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1. 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.
WARNING
CAUTION
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 property damage.
WARNING
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 high impedance speaker terminals, never touch these terminals to avoid electric shock. (DA-500FH only)
•External wiring connected to the terminals marked with 
requires installation by an instructed person.
•The apparatus shall be connected to a mains socket outlet with a protective earthing connection.
When the Unit is in Use
•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.)
•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 such as modification inside the unit to qualified service personnel.
•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.
CAUTION
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.
•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.
•To avoid electric shocks, be sure to switch off the unit's power when connecting speakers.
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•The unit is 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.
·Install the equipment rack on a stable, hard floor. Fix it with anchor bolts or take other arrangements to prevent it from falling down.
·The supplied rack-mounting screws can be used for the TOA equipment rack only. Do not use them for other racks.
·When installing the unit in a rack other than that of TOA, be sure to use the screws with a diameter of over 5 mm and length of over 12 mm to mount the unit.
·When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to the unit.
When the Unit is in Use
•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.
•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. Doing otherwise may cause a fire or electric shock.
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.
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.
2. GENERAL DESCRIPTION
TOA's DA-550F Multichannel Power Amplifier features high power handling of 550 W x 4 channels (4 Ω output) or 350 W x 4 channels (8 Ω output) and durability. Besides, its channels 1 and 2, and 3 and 4 are made available for bridge connection individually, allowing it to be used as a 1,100 W (8 Ω) x 2 channels stereo amplifier or as a 3-channel amplifier comprised of 1,100 W (8 Ω) + 550 W (4 Ω) x 2 channels.
The DA-500FH Multichannel Power Amplifier features high power handling of 500 W (100 V line) x 4 channels (20 Ω output) and durability.
Their wide range of applications include stores and permanent sound systems.
3. FEATURES
•2U rack mounting size*.
•Low power consumption and light weight.
•An input signal to Channel 1 can be routed to all channels, and the output level adjusted using the input level control for each channel.
•Electronically-balanced inputs.
•Input terminals employ removable terminal blocks and XLR type connectors 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.
•Equipped with the terminals used for internal information monitoring (power supply, protection status, and fan operation) and power ON/OFF control from external equipment.
* 1U size = 44.5 mm (reference size)
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4. 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 2 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°C and +40°C and the moisture is less than 90%RH (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.
5. INSTALLATION PRECAUTIONS
The supplied rack-mounting screws can be used for the TOA equipment rack only. Do not use them for other racks.
When installing the unit in a rack other than that of TOA, be sure to use CAUTION the screws with a diameter of over 5 mm and length of over 12 mm to
mount the unit.
Failure to do so may cause personal injury.
•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-550F/500FH
Perforated panel
Power amplifiers
DA-550F/500FH
* 1U size = 44.5 mm (reference size)
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6. NOMENCLATURE AND FUNCTIONS |
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[Front] |
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3 |
4 |
5 |
2 |
1 |
DA-550F |
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3 |
4 |
5 |
2 |
1 |
DA-500FH |
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1.Power switch [ON/OFF]
Power is switched on and off with each depression of this switch.
2.Power indicator [POWER]
Lights blue when the power is switched on.
3.Input level controls
[CH 1 (BRIDGE 1), CH 2, CH 3 (BRIDGE 2), CH 4]
Adjust the input level of each channel.
When a bridge connection is made (DA-550F only)
•When Channels 1 and 2 are bridgeconnected (BRIDGE 1 ON/OFF switch (10) is set to ON), the CH 1/BRIDGE 1 level control adjusts the input levels of Channels 1 and 2. In this event, the CH 2 level control cannot be used.
•When Channels 3 and 4 are bridgeconnected (BRIDGE 2 ON/OFF switch (10) is set to ON), the CH 3/BRIDGE 2 level control adjusts the input levels of Channels 3 and 4. In this event, the CH 4 level control cannot be used.
4.Ventilation panel (Air Vent)
A filter is located inside the ventilation panel. To clean the filter, remove the ventilation panel. (See p. 13; Cleaning the Filter.)
5.Indicators [INPUT, OUTPUT, PEAK, PROTECT]
The indicators are as follows from left to right:
•Input indicator [INPUT]
Lights green regardless of the input level control setting when an input signal level exceeds about –20 dB.
•Output indicator [OUTPUT]
Lights yellow when an output level exceeds about 1 W at an 8 Ω load (DA-550F) or 20 Ω load (DA-500FH).
•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. 12; Protection Operation List.) When the power is switched on, this indicator lights for about 2 seconds and then extinguishes.
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