TOA P-2240 Series PA Amplifiers: Operating Instructions

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.

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.

? The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenance (servicing) instruction in the literature accompanying the appliance.

WARNING: Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury.

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.
• 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.

The terminals marked with [Hazardous Live Terminals Symbol] are hazardous live. The external wiring to these terminals requires installation by an instructed person.

The apparatus shall be connected to a mains socket outlet with a protective earthling connection.

The socket-outlet shall be installed near the equipment and the plug shall be easily accessible.

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 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.

CAUTION: Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage.

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.
• 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. Also, periodically clean the ventilation slots of dust.
• 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.

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.
• When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to the unit.
• Rack-mounting screws are not supplied with the unit. Prepare them that are appropriate for the equipment rack.

Keep the P-2240 amplifiers over 10 cm (3.94 inches) away from objects that may obstruct air flow to prevent the unit's internal temperature rise.

Diagram Description: A diagram shows the P-2240 amplifier unit with arrows indicating a minimum clearance of 10 cm (3.94 inches) required on all sides (front, rear, top, bottom, left, right) to ensure proper airflow and prevent internal temperature rise.

When the Unit is in Use:

• Do not operate the unit for an extended period of time with the sound distorting. Doing so may cause the connected speakers to heat, resulting in a fire.
• 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.

ATTENTION: The unit must not be exposed to splashes or spills, and no objects filled with liquid, such as vases, should be placed on the unit.

3. General Description

TOA's Basic Power Amplifiers P-2240 are high cost-performance power amplifiers suited for broadcasting paging or background music in schools, offices, shops, factories, mosques, churches, and large rooms.

4. Features

• High durability, high reliability, and high cost performance.
• Two balanced parallel inputs, one speaker line input.
• Speaker output of constant voltage distribution system (70 V or 100 V) and low impedance (4 Ω).
• Operates on both AC and DC power.
• Semi-fixed master volume control and independent speaker line input volume control.
• Semi-fixed and independent tone controls of boost and cut type for both high and low frequencies.
• Power remote switch by make contact input.

5. Nomenclature and Functions

Front Panel

Diagram Description: The front panel of the P-2240 amplifier is shown. Key controls and indicators are numbered:

• 1. Power switch: Press to turn ON the power. Press again to turn the power OFF. Disconnect the AC mains plug or DC Terminal to shut the power OFF completely.
• 2. Power indicator: Lights green when power is switched ON.
• 3. Signal indicator: Lights green when power is switched ON, and indicates an output signal.
• 4. Peak indicator: Lights red to indicate the output signal reaches the peak level, signifying distorted sound. In such a case, adjust the master volume control to reduce output level.
• 5. Master volume control: Adjusts the overall signal level.

Rear Panel

Diagram Description: The rear panel of the P-2240 amplifier is shown with various input, output, and control terminals, along with power specifications and certifications.

• 6. Treble control: Adjusts treble response. Rotate clockwise to increase treble output, and counterclockwise to reduce it. The center position provides flat characteristics.
• 7. Bass control: Adjusts bass response. Rotate clockwise to increase bass output, and counterclockwise to reduce it. The center position provides flat characteristics.
• 8. AC power cord: Connects to an AC power source.
• 9. Power remote switch: Connects to an external switch. With the unit's power switched OFF, shorting the Power Remote terminals can turn it on remotely. With ON, the power cannot be remotely controlled.
• 10. DC terminal: Connects to a DC power supply of 24 V.
• 11. Output terminals: Connect to speakers. When connecting speakers, use only one of the speaker output terminals, low or high impedance.
• 12. Terminal cover: To avoid electric shocks from high voltage at output/input terminals, ensure the terminal cover is replaced after connecting cords.
• 13. Speaker line input: 40 dB*, 10 kΩ, unbalanced. Connects to a 100 V line speaker output.
• 14. Speaker line in volume control: Adjusts the signal level for the speaker line input.
• 15. Line input: 0 dB*, 10 kΩ, transformer balanced. Connects to Line Out/Rec Out of a Mixer Amplifier or Loop Out of another P-2240 Power Amplifier.
• 16. Loop output: 0 dB*, 10 Ω, transformer balanced. Parallel connection with Line Input (15). Connects to Line In of another P-2240 Power Amplifier.
• 17. Functional earth terminal: Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional earth terminal of the external equipment may reduce the hum noise. Note: This terminal is not for protective earth.

* 0 dB = 1 V

Explanation of Symbols

• [Volume Control Symbol] (Front/Rear panels): Volume controls: turn clockwise with a screw driver to increase the volume, turn counterclockwise to decrease the volume.
• [Standby Mode Symbol] (Front panel): Push the button to set the system into standby mode. During standby mode, BGM broadcasting is not possible, but all other system functions remain active.
• ? Warning: Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury. Do not touch the parts indicated with this symbol. These can provide a dangerous voltage that can result in death or serious personal injury when touching them.
• [Recycling Symbol] Do not trash this device into normal waste. Use the foreseen electric waste collection places.
• [CE Mark] This mark is a declaration that this product complies with all applicable EU directives and regulations.
• [Remote Switch Symbol] This symbol indicates that a switch can be connected to the two clamps for remotely switching on the unit.
• [ACMA Compliance Symbol] This symbol indicates a device's compliance with all applicable ACMA regulatory arrangements (telecommunications, radio communications, EMC and EME); and with applicable electrical equipment safety requirements relevant to each state and territory in Australia.

6. Connections

6.1. Input Connections

6.1.1. Connection with the mixer preamplifier having the balanced type output

Because it is hard to be affected by external noise, the connections of the balanced type are recommended. This connection is also recommended when the mixer preamplifier is separated from this power amplifier by more than 10 m, or in locations with significant electric noise.

Diagram Description: Shows a connection between the P-2240's LOOP OUT and LINE IN terminals (labeled E, C, H) and a Mixer Preamplifier.

6.1.2. Connection with the mixer preamplifier having the unbalanced type output

Please make the length of the cable less than several meters.

Diagram Description: Shows a connection between the P-2240's LOOP OUT and LINE IN terminals (labeled E, C, H) and a Mixer Preamplifier, using unbalanced connections.

6.1.3. Speaker line input connection

It is connected to the High Impedance (70 V/100 V) speaker wiring of other amplifier.

Diagram Description: Shows connections to the P-2240's 100V LINE IN, COM 100V, and COM 70V 100V terminals, linking to an 'Other Amplifier' with speaker outputs.

6.1.4. Parallel connection of the input

Diagram Description: Illustrates parallel input connections for multiple P-2240 units. The output from a Mixer Preamp (OUT) or Mixer Power Amp (REC-OUT, AUX-OUT) is connected to the LINE IN terminals of 'No. 1 P-2240' and 'No. 2 P-2240', with a 'Next P-2240' also shown.

6.1.5. Remote power switch connection

Diagram Description: Shows a simple connection diagram for a remote power switch connected to the REMOTE POWER SWITCH terminals.

6.2. Output Connections

Diagram Description: Three connection diagrams are shown for speaker outputs:

• Low Impedance Speaker: Connects to the 4 Ω terminal and COM terminal. A 4-16 Ω speaker is depicted.
• 70 V Line Speaker: Connects to the 70V terminal and COM terminal. A 70 V Line Speaker is depicted.
• 100 V Line Speaker: Connects to the 100V terminal and COM terminal. A 100 V Line Speaker is depicted.

Notes

• The 4 Ω, 70 V, and 100 V terminals cannot be used at the same time.
• Impedances indicated at the terminal represent the total speaker system (load) impedances.
• Total impedance of 100 V line: 42 Ω
• Total impedance of 70 V line: 21 Ω

CAUTION: Be sure to attach the supplied terminal cover after connection completion. Because high voltage is applied to the speaker terminals, never touch these terminals to avoid electric shock.

6.3. Example of External Equipment Connections

Diagram Description: A comprehensive connection example is shown. The Power Amplifier P-2240 is connected to AC Mains and a Remote Power Switch. It is also shown connected to Mixer Amplifiers (A-2030/2060/2120/2240) via LINE IN and LOOP OUT. Speaker outputs are connected to 100 V Line Horn Speakers and 100 V Line Column Speakers, both with matching transformers. A 24 V DC Battery is also shown as a power source option.

7. Installation

Keep the unit's all sides over 10 cm (3.94 inches) away from objects that may obstruct air flow to prevent the unit's internal temperature rise.

Diagram Description: A diagram illustrates the P-2240 amplifier placed in a rack or on a surface, with arrows indicating a minimum clearance of 10 cm (3.94 inches) on all sides to ensure adequate ventilation.

8. Volume Control Settings

Output levels are adjustable with individual volume controls. For music play or announcement, adjust the corresponding volume control so that the red peak indicator lights intermittently. Note that the sound quality is downgraded when the peak indicator remains lit.

9. Block & Level Diagram

Diagram Description: This diagram illustrates the internal signal flow and components of the P-2240 amplifier. It shows inputs like LINE INPUT, LOOP OUT, and SPEAKER LINE IN. Controls include REMOTE POWER SWITCH, Tone controls (Bass, Treble), Master volume, and indicators like Power LED, Signal LED, and Peak Level LED. Internal components mentioned are DC FAN, Thermal Sensor, Thermostat, DC Fuse, and AC Fuse. Outputs are shown for 100V, 70V, and 4Ω speaker connections, along with COM terminals. The diagram also depicts the AC Mains input and DC input.

10. Dimensional Diagram

Diagram Description: Provides the physical dimensions of the P-2240 amplifier in millimeters and inches. Key dimensions include:

• Width: 420 mm (16.54")
• Height: 100.9 mm (3.97")
• Depth: 351.3 mm (13.83")
• Front panel height: 12.5 mm (0.49")
• Rear terminal height: 22.7 mm (0.89")
• Side panel height: 88.4 mm (3.48")
• Rear panel height: 58.4 mm (2.30")
• Front panel depth: 40 mm (1.58")

11. Specifications

* 0 dB = 1 V

Notes

• CE, CE-AU, and CE-GB are the identically same specifications, but only power supply cord is different.
• The design and specifications are subject to change without notice for improvement.

Traceability Information for Europe

Manufacturer: TOA Corporation
7-2-1, Minatojima-Nakamachi, Chuo-ku, Kobe, Hyogo, Japan

Authorized representative: TOA Electronics Europe GmbH
Suederstrasse 282, 20537 Hamburg, Germany

URL: https://www.toa.jp/