BOSE MB4 Service Manual
Panaray® MB4 Modular Bass
Loudspeaker System
©2006 Bose Corporation
Service Manual
Reference Number 259321-SM Rev. 01
Electronic Copy Only
Contents
Warranty.............................................................................................................................................2
Specifications....................................................................................................................................3
Product Description..........................................................................................................................3
Part List Notes...................................................................................................................................3
Packaging Part List, Panaray® MB4 Bass Loudspeaker (see Figure 1) ......................................4
Figure 1. Panaray MB4 Bass Loudspeaker Packaging View ...........................................................4
Main Part List, Panaray MB4 Bass Loudspeaker System (see Figure 2).....................................5
Figure 2. Panaray MB4 Bass Loudspeaker Exploded View .............................................................5
Disassembly Procedures .................................................................................................................6
Test Procedures ................................................................................................................................7
Figure 3. Panaray MB4 Test Setup Diagram....................................................................................7
Part List, Panaray MB4 Bass Loudspeaker Protection Circuit Board (see Figure 3) .................8
Figure 4. MB4 Bass Loudspeaker Protection Board Layout.............................................................8
Figure 5. Panaray MB4 Bass Loudspeaker Wiring Diagram............................................................9
Service Manual Revision History...................................................................................................10
IMPORTANT SAFETY NOTICE: Do not attempt to remove the inserts holding the bass module
handle in place. These are held in place with a thread locking adhesive and ensure the integrity
of the mounting system. Any attempt to disassemble these parts will void the warranty. For this
reason the handle, end caps an inserts are not available as service parts.
®
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 MB4 Modular Bass Loudspeaker System
PROPRIETARY INFORMATION
Warranty
The Bose Panaray MB4 Modular Bass Loudspeaker System is covered by a limited 5-year
transferable limited warranty.
2
Specifications
External Dimensions: 26.7 x 10.2 x 18.1 in. (677 x 260 x 459 mm)
Weight: Single Speaker: 55 lb (25 kg)
Packed System: 62 lb (28 kg)
Sensitivity: 87 dB SPL, 40 - 300 Hz (1W, 1m free space)
System Protection: PTC, Lamp
Impedance: 8 Ohms nominal, 6.2 Ohms minimum
Power Handling: 200 Watts continuous per IEC-268 for 96 hours
Product Description
The Bose® Panaray® MB4 Modular Bass Loudspeaker System is a modular, low frequency
loudspeaker component that can be used in small, medium and large venues. It has a long-term
power rating of 200W. It uses four 5.25 inch bass drivers and has a bandwidth that extends
from 40 to 300 Hz. Its output, bandwidth and physical size makes it a useful unit quantity of
bass for use in singles and in multiples as a building block for any professional system.
The Bose Panaray MB4 Modular Bass Loudspeaker System has two standard colors: black and
white. The Panaray MB4 Modlular Bass Loudspeaker can be installed using an accessory wall
mount bracket.
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
Panaray® MB4 Bass Loudspeaker (see Figure 1)
Number
1 PACKING FOAM 259317 145A-7570-0 2
2 OWNER’S MANUAL 259162 4301-5189-1 1
3 POLYBAG, 12” x 16” x 49” N/A 1497-4552- 0 1
4 MB4 BASS MODULE, BLACK
MB4 BASS MODULE, WHITE
5 CARTON 259316 145A-7590-0 1
Number
027054
027055
Number
FM000C
FM001C
1
Figure 1. Panaray MB4 Bass Loudspeaker Packaging View
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