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Panaray® MA12EX Modular Line Array
Loudspeaker System
©2009 Bose Corporation
Service Manual
Reference Number 317302-SM Rev. 00
Electronic Copy Only
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Contents
Warranty.............................................................................................................................................2
Specifications....................................................................................................................................3
Product Description..........................................................................................................................3
Accessories Used with the MA12EX Loudspeaker System ..........................................................3
Part List Notes...................................................................................................................................3
Packaging Part List, Panaray® MA12EX Loudspeaker System (see Figure 1) ............................4
Figure 1. Panaray MA12EX Loudspeaker Packaging View .............................................................4
Packaging Part List, Panaray MA12EX Transformer Accessory (see Figure 2) ..........................5
Figure 2. Panaray MA12EX 70/100V Transformer Accessory Packing View...................................5
Main Part List, Panaray MA12EX Loudspeaker System (see Figure 3)........................................6
Figure 3. Panaray MA12EX Loudspeaker System Exploded View ..................................................7
Main Part List, Panaray CVT-MA12EX Transformer Accessory (see Figure 4)............................8
Figure 4. Panaray CVT-MA12EX 70/100V Transformer Accessory Exploded View.........................8
Disassembly Procedures ........................................................................................................... 9-10
MA12EX Loudspeaker ......................................................................................................................9
CVT-MA12EX T ransformer Accessory...........................................................................................10
Test Procedures .............................................................................................................................. 11
Figure 5. Panaray MA12EX Test Setup Diagram ........................................................................... 11
Figure 6. Panaray MA12EX Loudspeaker Wiring Diagram ............................................................ 12
Service Manual Revision History...................................................................................................13
®
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 MA12EX Modular Line Array Loudspeaker System
PROPRIETARY INFORMATION
Warranty
The Bose Panaray MA12EX Modular Line Array Loudspeaker System is covered by a 5-year
transferable limited warranty.
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Specifications
Description Part Number
External Dimensions: 38.75 x 4.125 x 5.5 in. (978 x 107 x 130 mm)
Weight: Single Speaker: 21.5 lb. (10 kg)
Packed System: 24 lb. (11 kg)
Sensitivity: 87dB SPL, 75 Hz - 15 kHz (1W/1m free space)
System Protection: None
Impedance: 8 Ohms nominal, 7.5 Ohms minimum
Power Handling: 150 Watts continuous per IEC-268-5, 75 Hz high pass,
96 hours. Recommended amplifier power 150-300 Watts
Product Description
The Bose
used for full range sound reproduction. It is a vented enclosure design using 12 full range 2.25”
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-MA12EX coupling bracket (see table below). Each loudspeaker has
two Neutrik® connectors and two barrier style terminals so that multiple units can be connected
as a system in series and parallel.
®
Panaray® MA12EX Modular Line Array Loudspeaker System is a modular system
The Bose Panaray MA12EX Loudspeaker can be used with the Bose Panaray MB4 Modular
Bass Loudspeaker for dynamic full range reproduction.
Accessories Used with the MA12EX Loudspeaker System
CVT-MA12EX, TRANSFORMER, 70/100V, BLACK 315338-0100
CVT-MA12EX, TRANSFORMER, 70/100V, WHITE 315338-0200
CB-MA12EX, COUPLING BRACKET, BLACK 317088-0100
CB-MA12EX, COUPLING BRACKET, WHITE 317088-0200
WMB2-MA12/MA12EX PITCH LOCK UPPER BRACKET, BLACK 318337-0100
WMB2-MA12/MA12EX PITCH LOCK UPPER BRACKET, WHITE 318337-0200
WMB-MA12/MA12EX, BI-PIVOT BRACKET, BLACK 318338-0100
WMB-MA12/MA12EX, BI-PIVOT BRACKET, WHITE 318338-0200
WB- MA12/MA12EX, PITCH ONLY BRACKET, BLACK 318418-0100
WB- MA12/MA12EX, PITCH ONLY BRACKET, WHITE 318418- 0200
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.
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Packaging Part List
Item
Description Bose® Part
Vendor Part Number Qty. Note
Panaray® MA12EX Loudspeaker System (see Figure 1)
Number
1 CARTON 317410-000S
2 PACKING END CAP,
ARRAY
3 PACKING CENTER,
ARRAY
4 MA12EX SYSTEM
BLACK
WHITE
5 POLY BAG,
1350x240x0.05MM
Number
318051-000S
318052-000S
317302-0100
317302-0200
145B-4090+0 1
1491-7441+0 2
1491-7431+0 2
BSSPTENOR+07CS11
BSSPTENOR+07CS12
- 1497-7592+0 1 4
1
5
4
3
2
1
Figure 1. Panaray MA12EX Loudspeaker Packaging View
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Packaging Part List
Item
Description Bose® Part
Vendor Part
Qty. Note
Panaray® MA12EX Transformer Accessory (see Figure 2)
Number
1 XFMR CARTON, INNER 319178-000S 1438-6801+0-1 1
2 XFMR PACKING, BOTTOM 319179-000S 1493-2071 1
3 XFMR PACKING, TOP 318303-000S 1493-2061 1
4 POLY BAG, 80x60x0.06MM - 1497-7502+0 1
5 SCREW, SS, M6x12, HEX
SOCKET
6 XFMR MTG BRACKET, BLACK 317445-010S 4135-8841 1
XFMR MTG BRACKET, WHITE 317445-020S 4135-8842
7 POLY BAG, 300x100MM - 1497-0082+0 1
8 CARTON SHEET, 250x200MM - 1451-0280+0 2
9 CARTON SHEET, 530x300MM - 1451-0290+0 2
10 POLY BAG, 360x360MM - 1497-1542+1 1
11 XFMR CARTON, K=A,
850x535x310MM
Number
- 2908-
318302-000S 1438-6901+0-2 1
Number
4
6012+D400
6
5
7
4
3
2
1
8
10
9
11
Figure 2. Panaray
®
MA12EX 70/100V Transformer Accessory Packing View
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Main Part List
Item
Description
Bose® Part
Vendor Part
Qty
Note
Panaray® MA12EX Loudspeaker System (see Figure 3)
Number
1 END CAP, STEEL
WHITE
BLACK
2 SCREW, SS, M3X16
WHITE
BLACK
3 COVER, GRILLE
WHITE
BLACK
4 HOUSING, ALUMINUM
WHITE
BLACK
5 PORT TUBE - 4158-9230+0 2 4
6 SCREW, BT, PH, M3x12,
W/WASHER
7 BAFFLE - 4158-4830+0 2 4
8 SCREW, SS, M3.5x25 - 2950-3525+H000 24 4
9 DRIVER, 2.25”, 5 OHM 318828-000S 8900-3920+0 12
10 SCREW, SS, M3x12 - 2954-3012+H000 52 4
11 GRILLE, MESH
WHITE
BLACK
12 TERM STRIP, 2 POLE 317421-000S 4124-0680+0 2
TERM STRIP, 4 POLE 317450-000S 2133-3330+0 2
13 NEUTRIK CONNECTOR 318841-000S 2113-3140+0 2
14 BOSE® LOGO
WHITE
BLACK
15 GASKET, END CAP - 4149-7621+0 2 4
16 GASKET, EVA, 5x500 - 4153-3331+0 6 4
17 GASKET, EVA, 3x515 - 4153-3381+0 2 4
18 GASKET, GRILLE - 4153-3431+0 2 4
19 FOAM, D12, L=8 - 4149-1171+0 2 4
20 PRODUCT LABEL - 3004-0121+0 1 4
21 WIRE, BLUE, 150MM - 7012-0570+0 8 4
22 WIRING HARNESS - WIRING+TENOR 1 4
Number
320837-020S
320837-010S
-
-
317426-020S
317426-010S
-
-
- 2950-3012+U020 4 4
317423-020S
317423-010S
317418-020S
317418-010S
Number
4135-8862
4135-8861
2951-3016+H000
2951-3016+Q000
4160-1050+0
4060-1051+0
1422-3321+0
1422-3320+0
4124-0691+0
4124-0690+0
2150-5814+0
2150-5813+0
2
20 4
2
1 4
1
1
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Figure 3. Panaray
®
MA12EX Loudspeaker System Exploded View
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Main Part List
Item
Description Bose® Part
Vendor Part
Qty. Note
Panaray® CVT-MA12EX Transformer Accessory (see Figure 4)
Number
1 SCREW, SS, M3x10 - 2951-3010- H 000 4 4
2 XFMR GRILLE, BLAC K 3174 46-010S 4135-8831 1
XFMR GRILLE, WHITE 317446-020S 4135-8832
3 GASKET, PE, 600x10x1MM - 4149-7221+0 .042 4
4 XFMR BRACKET, BLA C K 317449-010S 1407-1101 1
5 NUT, SS, M4 - 2640-4030+068Q 2 4
6 XFMR HOUSING, BLACK 317447-010S 1407-2401 1
XFMR HOUSING, WHITE 317447-020S 1407-2402
7 BRACKET, SPC C, T= 1 - 4135-9081+0 2 4
8 GRILLE TRIM - 4160-1051+0 2 4
9 HOUSING EN D C AP, TOP
BLACK
WHITE 317448-020S 4135-8852+0
10 SCREW, SS, M4x12 - 2901-4012+H000 2 4
11 TRANSFORMER, 70/100V 317574-000S 1806-4063+0000 1
12 SPEAKON CONNECTOR 318841-000S 2113-3140 1
13 SCREW, SS, M3x14 - 2951-3016+H000 18 4
14 TERM STRIP, 4 POLE 317450-000S 2133-3330 1
15 SCREW, SS, M3x12 - 2954-3012+H000 2 4
16 HOUSING END CAP, BOTTOM
BLACK
WHITE 320837-020S 4135-8862
Number
317448-010S
320837-010S
Number
4135-8851+0
4135-8861
1
1 4
10
1
9
8
7
6
4
5
3
2
8
16
11
12
13
14
15
13
1
Figure 4. Panaray
®
CVT-MA12EX 70/100V Transformer Accessory Exploded View
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Disassembly Procedures
MA-12EX Loudspeaker System
Refer to the figure below for the following
procedures.
1. End Cap Removal
1.1 Remove the eight screws (2) that secure
the steel end cap (1) to the housing and
grille cover (3).
1.2 Gently pull the end cap away from the
housing.
Re-assembly Note: When replacing the end
cap, ensure that it is fully seated against the
housing for an airtight seal. Replace all of
the screws to prevent air leaks.
2. Grille Assembly Removal
2.1 Remove the eight screws (2) that secure
each of the steel end caps (1) to the housing
and grille trim.
2.2 Gently pull the grille assembly away
from the housing. Be careful not to mark
the surface of the grille or the housing.
Re-assembly Note: Be sure to use an
appropriate sealing agent when replacing
the grille into the housing to prevent rattles.
3. Driver Removal
3.1 Perform procedure 2.
3.2 Using a Phillips-head screwdriver,
remove the four screws (10) that secure the
driver to the baffle.
3.3 Unplug the wires from the driver. Lift out
the driver.
4. Baffle Removal
4.1 Perform procedure 2.
4.2 Remove the 14 screws (10) that secure
the baffle to the housing (4). Lift off the
baffle.
5. Barrier Terminal Strip or Neutrik
®
Speakon® Connector Removal
5.1 Perform procedure 4 for the connector
you wish to remove.
5.2 Make a note of the wiring configuration,
and unsolder the wires from the connector
you wish to replace.
5.3 Remove the two screws that secure the
connector to the speaker housing. Lift off
the connector.
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Disassembly Procedures
CVT-MA12EX T ransformer Accessory
Refer to the figure below for the following
procedures.
1. End Cap Removal
1.1 Remove the six screws (13) that secure
the end cap housing (9) to the transformer
housing (6).
1.2 Remove the four screws (1) that secure
the grill trim (8) and the transformer bracket
(4).
Note: Do not remove the two larger screws
(10). These screws secure the transformer
(11) to the end cap and have nuts (5) and a
bracket (7) on the other end.
1.3 Lift off the end cap.
2. Grille Removal
2.1 Perform procedure 1. Lift off the
grille (2).
3. Transformer Removal
3.1 Perform procedure 1.
3.2 Remove the two screws (10) and nuts
(5) that secure the transformer to the end
cap.
3.3 Make a note of the wiring configuration,
and unsolder the wires from the barrier
terminal strip and the Neutrik connector. Lift
off the transformer.
4. Barrier Terminal Strip or Neutrik
Speakon® Connector Removal
4.1 Perform procedure 1.
4.2 Make a note of the wiring configuration
and unsolder the wires from the connector
(12 or 14) you wish to remove.
4.3 Remove the screws (13 or 15) that
secure the connector to the transformer
housing (6). Lift off the connector.
®
10
1
9
8
11
7
6
12
13
4
5
14
3
15
8
2
16
13
1
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Test Procedures
Audio Signal
Generator
Power Amplifier
INPUT OUTPUT
Figure 5. Panaray® MA12EX Test Setup Diagram
1. Air Leak Test
1.1 Set up the system for test as shown in
Figure 5 above.
1.2 Apply a 100 Hz, 10 Vrms sine wave to
the loudspeaker input connector.
1.3 Listen carefully for any air leaks from
around the end cap, drivers and the baffle.
Air leaks will be heard as a hissing or sputtering sound. All repairs must be hidden.
Test duration should be 5 seconds minimum.
2. Rub and Tick Test
2.1 Perform loudspeaker disassembly
procedure 3. It is not necessary to unplug
the wires at the driver assembly terminals.
2.2 Connect a signal generator directly to
the terminals of the driver under test.
If the noise stays the same, it is normal
suspension noise and the driver is fine.
Suspension noise will not be heard with
program material.
3. Phase Test
3.1 Momentarily apply 10 VDC to the loud-
speaker input connector. Apply the positive
to pin “1+” and the negative to pin “1-” of the
®
Neutrik
connector.
3.2 When applying the DC voltage level,
observe the driver cones. They should all
move outward when the DC level is applied.
3.3 Rewire any incorrectly wired driver.
4. System Sweep Test
4.1 Set up the system for test as shown in
Figure 5.
2.3 Apply a 20 Hz, 5 Vrms sine wave to the
driver assembly.
2.4 Listen carefully for any extraneous
noises, such as rubbing, scraping or ticking.
Note: To distinguish between normal suspension noise and rubs or ticks, displace the
cone slightly with your fingers.
4.2 Apply a 10 Hz, 10 Vrms sine wave to the
loudspeaker input connector.
4.3 While listening to the output of the
system, sweep the input frequency slowly
from 10 Hz to 20 kHz.
4.4 Listen carefully for any extraneous
noises such as buzzing or ticking.
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NEUTRIK
CONNECTOR
SCREW
TERMINAL
SCREW
TERMINAL
NEUTRIK
CONNECTOR
Figure 6. Panaray
®
MA12EX Loudspeaker Wiring Diagram
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Service Manual Revision History
Date Revision
Description of Change Change Driven
Pages
Level
5/09 00 Document released at revision 00. Service manual
By
release
Affected
All
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SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
Bose Corporation
The Mountain
Framingham Massachusetts USA 01701
P/N: 317302-SM R ev. 00 5/2009 (P)
http://serviceops.bose.com
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