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BMA SERIES: INSTALLATION & OPERATION MANUAL

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The inDESIGN BMA 30, BMA 60, BMA 120 and BMA 240 
are high quality mixer amplifiers for commercial and industrial 
audio applications.

The BMA series feature 4 Mic/line inputs. Microphone input 1 
features a mute so that a Microphone on this channel will mute 
all other inputs, useful for paging announcements. The BMA 
Series provide either 4 Ohm or constant voltage 100V speaker 
outputs. A pre-amp out/power amp in link allows for the mixer 
audio signal to be sent to an external equaliser or a booster 
amplifier. Shipped with a link fitted.

The mixer amplifiers are part of inDESIGN’s Install Series, which 
also includes mixers and power amplifiers. These units provide 
excellent features and value.

INTRODUCTION

INTRODUCTION  

2

IMPORTANT SAFETY 
INSTRUCTIONS   3

INSTALLATION   5

FRONT PANEL 

 

6

REAR PANEL 

 

7

BLOCK DIAGRAM: 
•  Input 

 

 

•  Mix  

 

 

•  BMA 30/60 

        10 

•  BMA 120/240          11

SPECIFICATIONS          12

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 flash 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 sufficient 

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.

Summary of Contents for BMA 30

Page 1: ......

Page 2: ...30 60 10 BMA 120 240 11 SPECIFICATIONS 12 CONTENTS Electrical and Safety Warnings THESE SERVICE INSTRUCTIONS ARE FOR USE BY QUALIFIED SERVICE PERSONNEL ONLY TO REDUCE THE RISK OF ELECTRIC SHOCK DO NO...

Page 3: ...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 qualified service person to replace the power cord set specified by the manufactu...

Page 4: ...t 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...

Page 5: ...meter INSTALLATION How to Calculate the correct load for a 100V Amplifier When installing a 100V loudspeaker system it is rather simple to calculate the number of loudspeakers that can be connected to...

Page 6: ...Input 4 The selected Microphone or Line input level is controlled via these knobs 4 Treble Adjust the level to suit the required tone of the output Increasing the treble may improve intelligibility d...

Page 7: ...mplifier of the mixer to an external device such as an equaliser or processor and the processed signal can be fed back into the amplifier via the Main In connection If this feature is not used ensure...

Page 8: ...BMA SERIES INSTALLATION OPERATION MANUAL PAGE 8 BLOCK DIAGRAMS Input...

Page 9: ...BMA SERIES INSTALLATION OPERATION MANUAL PAGE 9 Mix BLOCK DIAGRAMS...

Page 10: ...BMA SERIES INSTALLATION OPERATION MANUAL PAGE 10 BMA 30 60 BLOCK DIAGRAMS...

Page 11: ...BMA SERIES INSTALLATION OPERATION MANUAL PAGE 11 BMA 120 240 BLOCK DIAGRAMS...

Page 12: ...nse 50Hz 18Khz 2dB At 3dB rated power Noise floor 8mV at 100V output 9mv at 100V output 10mv at 100V output 8mv at 100V output THD at 3dB rate power Less than 0 5 0 40 0 22 0 21 Tone control Bass 100H...

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