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3

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. 

• Ne pas exposer l'appareil à la pluie et le protéger

de tout contact avec de l'eau ou d'autres liquides
afin d'éviter un incendie ou une électrocution. 

• 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. 

• External wiring connected to the terminals marked

with

requires installation by an instructed person.

• Les câbles externes branchés aux bornes

marquées de

doivent être installé par un

technicien spécialement formé.

• The apparatus shall be connected to a mains

socket outlet with a protective earthing connection.

• L'appareil doit être branché à une prise

d'alimentation avec mise à la terre de protection.

• The socket-outlet shall be installed near the

equipment and the plug (disconnecting device)
shall be easily accessible.

• La prise doit être installée à proximité de

l'équipement et la fiche (dispositif de déconnexion)
doit être facilement accessible.

• Use the optional Rack mounting bracket MB-25B-

BK 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.

• Utilisez la patte de montage en bâti en option MB-

25B-BK ou MB-25B-J pour monter l'unité en bâti.
Retirez les quatre vis M4 x 8 sur les deux côtés de
l'appareil, et montez la patte à l'aide des vis M4 x
16 fournies avec la patte.

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.

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.

Le point d'exclamation à l'intérieur d'un triangle équilatéral avertit l'utilisateur de l'existence
d'instructions d'utilisation et d'entretien (réparation) dans la documentation fournie avec l'appareil.

WARNING

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

Summary of Contents for BA-235

Page 1: ...8 2 CHANNEL BROADCAST 9 9 OPERATION 9 10 INSTALLATION PRECAUTIONS 9 11 RACK MOUNTING BRACKET ATTACHMENT 10 12 VOLUME SETTING 11 13 VOLUME CONTROL COVER 11 14 BLOCK DIAGRAM 11 15 DIMENSIONAL DIAGRAM 12 16 SPECIFICATIONS 12 Accessories 12 Optional products 12 MASTER SIGNAL PEAK POWER ON OFF BASS TREBLE POWER AMPLIFIER BA 260 0 10 Thank you for purchasing TOA s Power Amplifiers Please carefully follo...

Page 2: ...instructions pour référence ultérieure Respecter tous les avertissements Suivre toutes les instructions Ne pas utiliser cet appareil à proximité d eau Nettoyer uniquement à l aide d un chiffon sec Ne pas obstruer les orifices de ventilation Installer conformément aux instructions du fabricant Ne pas installer à proximité de sources de chaleur telles que des radiateurs des registres thermiques des ...

Page 3: ...nter l unité en bâti Retirez les quatre vis M4 x 8 sur les deux côtés de l appareil et montez la patte à l aide des vis M4 x 16 fournies avec la patte 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 thi...

Page 4: ... 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 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...

Page 5: ...or flashes intermittently 3 GENERAL DESCRIPTION The BA 235 35 W and BA 260 60 W are Power Amplifiers for background music and general announcement 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 2 channel broadcast can be made 4 FEATURES Remote master volume control using an external volume...

Page 6: ...ternally connected in parallel to the Line input connectors 14 Connect to the other amplifier s input 13 Input level selector switch Selects either 0 dB or 4 dB for the line input sensitivity level 14 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 in...

Page 7: ...e 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 screwdr...

Page 8: ...rol 10 kΩ linear taper REMOTE VOLUME 6 3 2 Bridge output connection BRIDGE OUT 10kΩ H E E H Other power amplifier s Line input 6 3 Output Connections 6 3 1 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 total speaker load impedance 70 V LINE Total imped...

Page 9: ...e A Sound source B Sound source C LINE IN SPEAKER OUT BA 235 or BA 260 ZONE 2 Sound source C 9 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 rest...

Page 10: ...ws 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 1 at the top and the bottom ...

Page 11: ...ront 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 onto the control 14 BLOCK DIAGRAM POWER AMP SPEAKER OUT AC120 V 60 Hz POWER SUPPLY FOR POWER AMP 70 V LINE LINE IN 10...

Page 12: ...movable 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 Othe...

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