BOSE MA12 Service Manual
Panaray® MA12 Modular Line Array
Loudspeaker System
©2006 Bose Corporation
Service Manual
Reference Number 263639-SM Rev. 01
Electronic Copy Only
Contents
Warranty.............................................................................................................................................2
Specifications....................................................................................................................................3
Product Description..........................................................................................................................3
Accessories Used with the MA12 Loudspeaker System...............................................................3
Part List Notes...................................................................................................................................3
Packaging Part List, Panaray® MA12 Loudspeaker System (see Figure 1) .................................4
Figure 1. Panaray MA12 Loudspeaker Packaging View ..................................................................4
Main Part List, Panaray MA12 Loudspeaker System (see Figure 2) ............................................5
Figure 2. Panaray MA12 Loudspeaker System Exploded View .......................................................6
Part List, Panaray MA12 Loudspeaker Protection Circuit Board (see Figure 3).........................7
Figure 3. MA12 Protection Circuit Board Layout Diagram................................................................7
Figure 4. Panaray MA12 Loudspeaker Wiring Diagram...................................................................8
Disassembly Procedures .................................................................................................................9
Test Procedures ..............................................................................................................................10
Figure 5. Panaray MA12 Test Setup Diagram ................................................................................10
Service Manual Revision History...................................................................................................11
®
CAUTION: The Bose
contains no user-serviceable parts. To prevent warranty infractions,
refer servicing to warranty service stations or factory service.
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF
THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR
USED FOR ANY OTHER PURPOSE.
Panaray MA12 Modular Line Array Loudspeaker System
PROPRIETARY INFORMATION
Warranty
The Bose Panaray MA12 Modular Line Array Loudspeaker System is covered by a limited
5-year transferable limited warranty.
2
Specifications
Description
Product Code
External Dimensions: 38.5 x 4.2 x 5.1 in. (978 x 107 x 130 mm)
Weight: Single Speaker: 22 lb. (10 kg)
Packed System: 24 lb. (11 kg)
Sensitivity: 88dB SPL, 120 Hz - 15 kHz (1W/1m free space)
System Protection: PTC, lamp
Impedance: 8 Ohms nominal, 7.5 Ohms minimum
Power Handling: 300 Watts continuous per IEC-268-5, 120 Hz high pass,
96 hours. Recommended amplifier power 150-300 Watts
Product Description
The Bose® Panaray® MA12 Modular Line Array Loudspeaker System is a modular system used
for mid/high frequency sound reproduction. It is a vented enclosure design using 12 full range
drivers housed in a closely spaced line.
The loudspeaker provides a means for mechanical attachment of two units to form a rigid single
line source by using the CB-MA12 coupling bracket (see table below). Each loudspeaker has
two Neutrik® connectors and one barrier style terminal so that multiple units can be connected
as a system in series and parallel.
The Bose Panaray MA12 Loudspeaker can be used with the Bose Panaray MB4 Modular Bass
Loudspeaker for dynamic full range reproduction.
Accessories Used with the MA12 Loudspeaker System
WB-MA12 wall mount bracket (0º – 10º pitch) 028333 028334
WBP-MA12 wall mount bracket (0º – 10º pitch, +/- 90º yaw) 028673 028674
CB-MA12 coupling bracket 028337 028338
PSA-12 stand adapter 029229 CVT-12 70V/100V transformer (non-RoHS complaint) 029388 029389
CVT-12 70V/100V transformer (RoHS complaint) 040190 040191
Black White
Part List Notes
1. This part is not normally available from Customer Service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCBs are listed in the Electrical Part List.
3. This part is critical for safety purposes. Failure to use a substitute replacement with the
same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer
to the next higher assembly for a replacement part.
3
Packaging Part List
Item
Description Bose® Part
Vendor Part
Qty. Note
ESOB
Panaray® MA12 Loudspeaker System (see Figure 1)
Number
1 PACKING, END CAP 263624 1490-7393-0 2
2 POLYBAG N/A 1497-5102-0 1
3 MA12 LOUDSPEAKER REF REF 1
4 PACKING, CENTER 263625 1490-7433-1 1
5 OWNER’S MANUAL 263626 4301-5191-0 1
6 CARTON 263572 145A7780-0 1
Number
Number
Figure 1. Panaray MA12 Loudspeaker Packaging View
4
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