BOSE 302A Schematic
Bose® 302™A Loudspeaker
(Commercial Indoor/Outdoor
70V/100V Distributed Applications)
©2006 Bose Corporation
Service Manual
Part Number 257475 Rev. 02
Contents
Product Description ......................................................................................................................... 2
Specifications ....................................................................................................................................3
Disassembly/Assembly Procedures ........................................................................................... 4-5
Transformer Wiring ........................................................................................................................... 5
Figure 2. Transformer Wiring ................................................................................................................ 5
Figure 1. Wiring Diagram ..................................................................................................................... 5
Test Procedures ................................................................................................................................6
Figure 3. Schematic Diagram ..............................................................................................................6
Part List .............................................................................................................................................. 7
Figure 4. Exploded View ...................................................................................................................... 7
Packaging Part List ........................................................................................................................... 8
Figure 5. Packaging View .................................................................................................................... 8
Table of contents ................................................................................................................................. 9
PRODUCT DESCRIPTION
The Bose® 302™ A loudspeaker is designed for surface-mount commercial 70V/100V distributed
indoor and outdoor applications. Designed to be mounted on a wall, ceiling or overhang, the 302A
loudspeaker is packaged with mounting brackets that contain a 70V or 100V multi-tap (12W, 25W,
50W and 100W) transformer. Each 302A loudspeaker contains one 5.25” environmentally resistant
woofer in a two-chamber configuration and two 2.5” environmentally resistant Twiddler™ drivers
vertically stacked and angled for maximum horizontal dispersion.
CAUTION: The Bose
serviceable parts. To prevent warranty infractions, refer
servicing to warranty service centers or factory service.
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION
OF BOSE
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.
The Bose 302A loudspeaker is covered by a five year transferable limited warranty.
CORPORATION WHICH IS BEING FURNISHED
302A loudspeaker contains no user
WARRANTY INFORMATION
2
Transducers:
One 5.25" environmental woofer per enclosure
Maximum Acoustic Output:
SPECIFICATIONS
Two 2.5" environmental resistant TwiddlerTM drivers per enclosure
Crossover:
Low frequency cutoff:
Impedance:
Power Handling:
Transformer:
Frequency range:
Sensitivity:
Dispersion:
External Dimensions:
250Hz ±10% at 6dB/octave
-3dB at 75Hz ±5Hz
70V: 25 Ohms at 100W tap setting
100V: 50 Ohms at 100W tap setting
100W continuous per IEC 268-5
Multi-tap 70V/100V (12W, 25W, 50W,100W taps)
75Hz to 16 kHz
>82dB SPL at 1W, 1M (pink noise)
102dB SPL at 1M (pink noise)
102dB SPL at 1M (IEC noise)
(-6dB point, average, 1-4 kHz)
Horizontal 178
Vertical 93
o
o
Single speaker: 13.4"H x 5.7"W x 9.0"D (34 x 14.5 x 23) cm
Packed system: 16"H x 17"W x 14.75"D (40.6 x 43.2 37.47) cm
Weight:
Single speaker: 7.75 lb. (3.5 kg)
Packed system: 32.2 lb. (14.6 kg)
3
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