inDESIGN BA 460 User manual

BA SERIES: INSTALLATION & OPERATION MANUAL
PAGE 2
The inDESIGN BA Series Power Ampliers are high quality
ampliers for commercial and installed audio applications.
The BA Series Power Ampliers provide either 4 Ohm or 100V
speaker outputs.
The ampliers are part of inDESIGN’s Install Series, which also
includes mixers and power ampliers. These units provide
excellent features and value.
INTRODUCTION
INTRODUCTION 2
IMPORTANT SAFETY
INSTRUCTIONS 3
INSTALLATION 5
FRONT PANEL 6
REAR PANEL 7
BLOCK DIAGRAM 8
SPECIFICATIONS 9
CONTENTS
Electrical and Safety Warnings
THESE SERVICE INSTRUCTIONS ARE FOR USE BY QUALIFIED SERVICE PERSONNEL ONLY.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING
OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS
UNLESS YOU ARE QUALIFIED TO DO SO.
CAUTION
The lightening ash with arrowhead
symbol, with an equilateral triangle,
is intended to alert the user to the
presence of un-insulated
“dangerous voltage” within the products
enclosure that may be of sufcient
magnitude to constitute a risk of electric
shock to persons.
WARNING: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
AVERTISSEMENT: POUR ÈVITER
LE RISQUE D´INCENDIE OU DE CHOCS
ÈLECTRIQUES, NE PAS EXPOSER CET APPAREIL À
LA PLUIE OU À L´HUMIDITÈ
The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and maintenance
(servicing) instructions in the literature
accompanying the appliance.

BA SERIES: INSTALLATION & OPERATION MANUAL
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IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. To prevent injury please refer to these instructions for electrical and safety information before installing or
operating the apparatus.
6. This apparatus must not be exposed to dripping or splashing liquid.
No object lled with liquid, such as a vase, should be placed on the apparatus.
7. Clean only with a dry cloth.
8. Do not block any of the ventilation openings. Install in accordance with the manufacturer’s instructions.
9. Do not install near any heat sources such as radiators, heaters, stoves, or other apparatuses
(including ampliers) that produce heat.
10. Unplug this apparatus during lightening storms or when not in use for long periods of time.
11. Protective Earthing Terminal:
The apparatus should be connected to a mains socket outlet with a protective earthing connection.
12. The mains plug/appliance coupler is used as a disconnect device, the disconnect device shall remain
readily operable.
13. When not in use and during transportation, please take care of the power cord set, for example, tie up
the power cord set with a cable tie/something similar. It should be kept away from sharp edges and
the like that can cause abrasion of the power cord set. When put into use again, check that the power
cord set is not damaged. If any damage is found, have the unit checked by a qualied service person
to replace the power cord set specied by the manufacturer.
14. The terminals marked with symbol of “ “ may be of sufcient magnitude to constitute a risk of
electric shock. The external wiring connected to the terminals requires installation by a qualied service
person or the use of ready-made leads or cords.
15. Only use attachments/accessories specied by the manufacturer.
16. Check speaker line load prior to connecting to amplier using an impedance meter.
17. Refer all servicing to qualied service personnel. Servicing is required if the apparatus has been
damaged in any way, such as power-supply cord or plug breakage, damage due to liquid or objects
falling onto the apparatus, exposure to rain or moisture, or if the apparatus does not operate normally,
or has been dropped.
18. Correct Disposal of this Product:
This marking indicates that this product should not be disposed with other household wastes throughout
the EU. To prevent possible harm to the environment or human health from uncontrolled waste disposal,
recycle it responsibly to promote the sustainable reuse of material resources. To return your used device,
please use the return and collection systems or contact the retailer where the product was purchased.
They can take this product for environmental-safe recycling.
WARNING: There are no user serviceable parts inside. Refer all servicing to qualied service personnel.

BA SERIES: INSTALLATION & OPERATION MANUAL
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>10cm
>4in
You must allow a minimum 10 cm or 4 inches of unobstructed clearance around the unit.
Do not place the unit on a bed, sofa, rug, or similar surface that could block the ventilation openings. If the
unit is placed in a bookcase or cabinet, there must be ventilation of the cabinet to allow proper cooling.
>10cm >4in
>10cm >10cm
>4in >4in

BA SERIES: INSTALLATION & OPERATION MANUAL
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To calculate the ampliers capability:
If your chosen amplier has a maximum output of
120 Watts at 100V, the minimum impedance connected should be at least 83 Ohms (100V x 100V/120W).
Use a professional impedance meter, not a Multimeter.
INSTALLATION
How to Calculate the correct load for a 100V Amplier:
When installing a 100V loudspeaker system it is rather simple to calculate the number of loudspeakers that
can be connected to a particular 100V amplier.
Each 100V loudspeaker has a 100V transformer that will have different power tappings, for example 1.5, 3
and 6W. The sum of all taps should never exceed the ampliers power rating.
BA 4120
AMPLIFIER POWER > LOUDSPEAKER LOAD POWER
39W 1.5 1.5 3 3 6 12 12 = + + + + + +

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FRONT PANEL
1. Power Switch: Turns mains power on and off.
The LED light above the switch indicates the unit is on/off.
2. Level Indicator: To set for optimum working level normal signal should be kept under the 0dB.
The red +3dB will illuminate when signal is excessive.

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REAR PANEL
Mains Socket: The unit is connected to the mains circuit with a standard IEC type power lead.
This socket contains a rated slow blow fuse.
**NOTE: Only use a fuse equal to the marked rating.
• BA 460 uses a fuse with an 8A rating
• BA 4120 uses a fuse with a 12A rating
• BA 2240 uses a fuse with a 12A rating
3. Loudspeaker Outputs:
When connecting low impedance loudspeakers use the COM and 8Ω connections.
For 70V and/or 100V loudspeakers use the COM and 70V or 100V connections.
For 70V or 100V operation, the total minimum impedance of the loudspeaker lines should not overload
the amplier. Refer to the above installation guide for how to calculate the loudspeaker load or
measure with an impedance meter.
Use only one of the loudspeaker connections. Do not combine both 8Ω and 70V/100V loudspeaker
connections.
4. Input Link: The input signal can be routed to an adjacent channel by pressing the input link button.
When input is connected to the Channel 1 phoenix connector and it is to drive Channel 1 & Channel 2,
press the 1 → 2 link button.

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BLOCK DIAGRAM

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SPECIFICATIONS
BA 460 BA 4120 BA 2240
Output power 4 x 60W 4 x 120W 2 x 240W
AC power supply 230VAC - 240VAC
Output low impedance 4 ohm - 8 ohm
Hi impedance output 70V / 80 ohm 70V / 40 ohm 70V / 20 ohm
100V / 160 ohm 100V / 80 ohm 100V / 41 ohm
Input sensitivity Balance input 1V
Frequency response 50Hz-18Khz, + / - 2dB. At -3dB rated power
Noise oor (at 100V) 4mV
THD (100V at -3dB rate power) 0.10 %
Cooling Fan cooling, Thermal control
Size – mm 485 x 88 x 370
Weight – kg (Net) 14 17.3 15.2