TOA BA-260 CU Power Amplifier User Manual

TOA BA-260 CU Power Amplifier

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 a 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 one wider than the other.

• A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for the 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.

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 that 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) instructions in the literature accompanying the appliance.

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, or otherwise damage or 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.
• External wiring connected to the terminals marked with requires installation by an instructed person.
• The socket-outlet shall be installed near the equipment and the plug (disconnecting device) shall be easily accessible.
• Use the optional Rack mounting bracket MB-25BBK or MB-25B-J when mounting the unit(s) in an equipment rack.
• Remove four M4 x 8 screws on both sides of the unit, and mount the bracket there using the M4 x 16 screws (supplied with the bracket) instead.

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 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.

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 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 unplug the unit’s power supply cord 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 make other arrangements to prevent it from falling down.
• When connecting the unit’s power cord to an AC outlet, use the AC outlet with the current capacity allowable to the unit.
• No rack-mounting screws are supplied with the unit. Separately prepare the appropriate screws for the rack.
• Keep the amplifier over 10 cm (3.94″) away from objects that may obstruct airflow to prevent the unit’s internal temperature rise.

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 a minimum position before the 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.
• 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.

GENERAL DESCRIPTION

The BA-235 (35 W) and BA-260 (60 W) are Power Amplifiers for background music and general announcements. These units are suited for use in bars, retail stores, and banquet rooms. When used in conjunction with the optional mixer amplifier BG-220 (20 W) or BG-235 (35 W), the 2-channel broadcast can be made.

FEATURES

• Remote master volume control using an external volume control.
• Supplied volume control cover prevents accidental operation of the Master volume knob.
• Front operable bass and treble controls.
• Also, front panel recessed knobs help to prevent accidental operation.
• Removable input/output terminal blocks facilitate installation and maintenance.
• Besides, RCA jacks provided for LINE input

NOMENCLATURE AND FUNCTIONS

Front

Power switch
Power is switched on and off with each depression of this switch.

Power indicator
Lights are blue when the Power switch (1) is switched on.

Master volume control
Adjusts the gain of the Line input. Turn the knob clockwise to increase the level and counterclockwise to decrease it.

Signal level indicator
Lights are green when audio signals are output from the speaker output terminal.

Peak indicator
Lights are red if output signals approach clipping level. If steady lit, turn down the Master volume control until the indicator flashes intermittently.

Bass control

• Turn the control clockwise to increase the bass level and counterclockwise to decrease it.
• The center position of the control provides a flat frequency response.

Treble control

• Turn the control clockwise to increase the treble level and counterclockwise to decrease it.
• The center position of the control provides a flat frequency response.

[Rear]

Breaker
Cuts off the AC power supply from the AC outlet if the power current exceeds the allowable value.

Note
The yellow button in the breaker pops out to indicate that the breaker has tripped. After turning off the power and eliminating the cause of the breaker trip, press the button to reset the breaker.

AC power cord
Connect to an AC wall outlet.

Speaker output terminal
4 Ω, 25 V and 70 V outputs, removable terminal block.
Connects to speakers.
Refer to p. 7.

Remote volume terminal
Removable terminal block. Connecting a 10 kΩ linear taper volume control across these terminals will allow remote control of the speaker output level.

Bridge output terminal
Removable terminal block. This connector is internally connected in parallel to the Line input connectors (14). Connect to the other amplifier’s input.

Input level selector switch
Select either 0 dB or +4 dB for the line input sensitivity level.

Line input terminals
10 kΩ, 0 dB/+4 dB selectable (see item 13), unbalanced, removable terminal block and RCA jacks (Upper and lower RCA jacks are internally, passively mixed.) (* 0 dB = 1 V) These connectors are internally connected in parallel to the Bridge output connector (12). Connect to the MOH output or Line output of the optional BG-220 or BG-235, or the Line output of a sound source equipment such as a CD player.

Functional ground terminal
Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional ground may reduce the humming noise.

Note : This terminal is not for protective earth.

CONNECTIONS

Removable Terminal Plug Connection

Notes

• Avoid soldering cable conductors, 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

Wiring Procedure

• Step 1. Wiring the supplied removable terminal plug.
  • Loosen the terminal screws to insert the wire.
  • Tighten the terminal screws.
• Ensure that the wire does not break free when pulled. If the wire does pull free, repeat the connection procedure from the start.
• Step 2. Insert the wired terminal plug into the corresponding terminal block in the unit’s rear panel.
• Step 3. Tighten the fixing screws. (Speaker output terminals only)

Notes

• Do not reverse Steps 1 and 2.
• Poor contact may result if force is applied to the unit’s internal circuit board pins while the terminal screws are being tightened.
• Use an appropriate type of screwdriver for terminal plug wiring.

Input Connections

Line input connections

[Input level selection]
Input sensitivity can be switched to either 0 dB or +4 dB depending on the output level of the input equipment.

Output Connections

Speaker connections
Each amplifier has 3 speaker outputs: 4 Ω, 25 V, and 70 V. Use only one of these outputs for connection. Class 2 wiring may be used.

Note : Impedances in the figures below represent the total speaker load impedance

Bridge output connection

REMOTE VOLUME CONTROL CONNECTION
The external volume control can remotely adjust the signal level at the post- master volume control. When performing the remote volume control, adjust the master volume control in advance noting that its setting limits the maximum signal level adjustable with the volume control. Be sure to avoid turning fully down the master volume control.

Notes

• Negative terminal should not be grounded. Never connect it to the unit’s chassis nor other circuit ground.
• Only a volume control can be connected to these terminals

CHANNEL BROADCAST

• Each individual input of the optional BG-220 (20 W) and BG-235 (35 W) can be output to the MOH output.
• A 2-channel broadcast can be performed by connecting the MOH output to the unit’s LINE input. (Example)
• When MIC/LINE 1, LINE 2, and LINE 3 input signals are output to the Zone 1, and LINE 3 input signals to the Zone 2.

OPERATION

After completing all connections, turn on the power switch, and check to confirm that the power indicator lights.

Note
When the heat sink temperature exceeds 105 °C (221 °F), the protection circuit begins to operate to disconnect the output from the circuit. The disconnected output is automatically restored as soon as the temperature returns to the normal operating range.

INSTALLATION PRECAUTIONS

RACK MOUNTING BRACKET ATTACHMENT
To mount the BA-235 (BA-260) in a standard 19″ equipment rack, use the optional MB-25B-BK or MB-25B-J Rack Mounting Kit. Before attaching the rack mounting bracket, remove each 2 frontmost screws on both sides of the unit. These removed screws are not used for rack mounting.

Notes

• Rack mounting screws are not supplied with the unit. Use the screws that are appropriate for the rack.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
• To achieve sufficient ventilation, also mount the optional

*PF-511 Perforated Panel (1U):**

• at the top and the bottom of the rack, and
• above and below the unit.
• 1U size = 44.5 mm or 1.75″ (reference size)

[MB-25B-BK]

• Remove 4 plastic feet on the bottom surface.
• Note that these removed screws are not used.
• Attach the MB-25B-BK to the unit using the supplied 4 screws.

[MB-25B-J]

• The MB-25B-J is designed to mount two BA-235 (BA-260) units in a single rack.
• When using this bracket, remove 4 plastic feet on the bottom surface of each unit and joint the 2 units with a joint bracket, as illustrated below.
• Then attach the mounting brackets using the supplied 4 screws.

VOLUME SETTING
Output levels are adjustable with the Master volume control. For music play or announcements, adjust the volume control so that the signal indicator lights intermittently. Note that the sound quality is downgraded when the peak indicator remains lit.

VOLUME CONTROL COVER
To prevent the accidental change of the Master volume control setting on the front panel, it is recommended to replace its control knob with the supplied YA-920 Volume Control Cover. Follow the procedure below for its replacement.

• Step 1. Remove the control knob.
• Step 2. Adjust the Master volume control (without knob) to an appropriate level.
• Step 3. Attach the YA-920 to the control

DIAGRAM

BLOCK DIAGRAM

DIMENSIONAL DIAGRAM

SPECIFICATIONS

52 W (based on cULus standards)

| 130 W (rated output)

66 W (based on cULus standards)

Frequency Response| 50 Hz – 20 kHz
Total Harmonic Distortion| 0.5% or less, at 1 kHz, rated output
Input| Line input
Input Sensitivity/

Impedance

| Line input: 0 dB/+4 dB (selectable), 10 kΩ, unbalanced,

removable terminal block or RCA jacks

Output| Speaker Output| 4 Ω, 25 V (18 Ω) and 70 V (140 Ω)

balanced, removable terminal block

| 4 Ω, 25 V (10 Ω) and 70 V (83 Ω)

balanced, removable terminal block

Bridge Output| Parallel in Line input, removable terminal block
Output Regulation (1 kHz)| Under 2 dB, no load to full load
S/N Ratio| Line input: Over 80 dB

(Band Pass: 20 Hz – 20 kHz, Tone Controls: Centered)

Tone Control| Bass: ±10 dB at 100 Hz, Treble: ±10 dB at 10 kHz
Control| Master gain control

Bass tone control, Treble tone control Input level selector switch

Remote volume control

Power ON/OFF switch

Indicator| Power LED, Signal level LED, Peak LED
Other Feature| Automatic electronic drive limiter
Operating Temperature| 0 to 35 °C (32 to 95 ºF)
Operating Humidity| 35 % to 80 % RH (no condensation)
Finish| Panel:  ABS resin, black

Case:     Steel plate, black, paint

Dimensions| 210 (w) x 94.3 (h) x 265 (d) mm (8.27″ x 3.71″ x 10.43″)
Weight| 4 kg (8.82 lb)| 4.6 kg (10.14 lb)

Accessories

• YA-920 Volume control cover ……………….. 1
• Removable terminal plug (2P) ……………….. 3
• Removable terminal plug (4P) ……………….. 1

Optional products.
Rack mounting brackets: MB-25B-BK, MB-25B-J

FAQs

What is the TOA BA-260 CU Power Amplifier?

The TOA BA-260 CU Power Amplifier is a high-quality audio amplification device designed for various audio applications.

What is the power rating of the TOA BA-260 CU?

The TOA BA-260 CU Power Amplifier has a power rating of 60 W.

How many channels does this amplifier have?

This amplifier features 1 channels for versatile audio processing.

Is it suitable for professional audio setups?

Yes, the TOA BA-260 CU is commonly used in professional audio setups due to its reliability and performance.

What are the input and output options?

This amplifier provides Line In: 0 dB/+4 dB (selectable), 10 kΩ, unbalanced, removable terminal block or RCA jack OutputSpeaker: 4 Ω, 25 V (10 Ω) and 70 V (83 Ω), balanced, removable terminal block Bridge: parallel in Line in, removable terminal blockfor connecting various audio sources and speakers.

Does it support multiple audio input sources?

Yes, it supports multiple audio input sources, making it versatile for different audio setups.

Is the TOA BA-260 CU rack-mountable?

Yes, it is designed to be rack-mounted for convenient installation in professional audio systems.

What is the warranty coverage for this amplifier?

Refer to the warranty information provided by the manufacturer or retailer.

Can it handle both low and high-frequency audio signals?

Yes, it is capable of handling both low and high-frequency audio signals with precision.

Is there a built-in cooling system for temperature control?

Yes, the TOA BA-260 CU features a built-in cooling system to prevent overheating during extended use.

Where can I find the user manual for this amplifier?

You can find the user manual for the TOA BA-260 CU on the official TOA website or through authorized TOA dealers.

What are the dimensions and weight of this amplifier?

The amplifier's dimensions are 210 (W) × 94.3 (H) × 265 (D) mm (8.27 × 3.71 ×10.43) inches and it weighs approximately 4.6 kg (10.14 lb) pounds.

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