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©2006 Bose Corporation

Service Manual

Bose

®

302™A Loudspeaker

(Commercial Indoor/Outdoor

70V/100V Distributed Applications)

Part Number 257475 Rev. 02

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Summary of Contents for 302 A

Page 1: ... 2006 Bose Corporation Service Manual Bose 302 A Loudspeaker Commercial Indoor Outdoor 70V 100V Distributed Applications Part Number 257475 Rev 02 ...

Page 2: ...eaker 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 envir...

Page 3: ... 100W continuous per IEC 268 5 Transformer Multi tap 70V 100V 12W 25W 50W 100W taps Frequency range 75Hz to 16 kHz Sensitivity 82dB SPL at 1W 1M pink noise Maximum Acoustic Output 102dB SPL at 1M pink noise 102dB SPL at 1M IEC noise Dispersion 6dB point average 1 4 kHz Horizontal 178o Vertical 93o External Dimensions 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...

Page 4: ...ration and then cut the wires as close as possible to the woofer s 1 wire terminal 5 3 Remove the four screws 16 that secure the woofer to the baffle Lift out the woofer 6 Woofer Replacement 6 1 To prevent air leaks use a new woofer gasket 15 and woofer mount gasket 13 Line up the woofer 1 in the baffle so that the wire terminal is facing toward the Twiddler drivers 2 Replace the four screws 16 th...

Page 5: ... Capacitor Replacement 10 1 Connect the leads of the capacitor 3 to the wires and solder the connections The capacitor is wired in series with the woofer s 1 positive terminal and the TwiddlerTM driver s 2 positive terminal Refer to Figure 1 and 3 10 2 To prevent air leaks use a new Twiddler driver panel 11 and gasket 12 Line up the Twiddler panel with the cabinet and replace the four screws 16 th...

Page 6: ...at approximately 65Hz and 185Hz is acceptable port tuned frequencies 3 Twiddler Driver Phase Test 3 1 Check the wiring of the Twiddler driver against Figures 1 and 3 4 Sweep Test 4 1 Apply an 8 Vrms 10Hz signal to the speaker input terminal 4 2 Sweep the signal generator from 10Hz to 5 kHz and then back to 10Hz 4 3 Apply a 3 Vrms 5 kHz signal to the speaker input terminal 4 4 Sweep the signal gene...

Page 7: ...9 CONNECTOR ENVIRONMENTAL RED 250815 02 1 10 GRILLE ALUMINUM BLACK GRILLE ALUMINUM WHITE 250804 11 250804 12 1 11 PANEL SEALING TWIDDLER DRIVER 250820 1 12 FOAM TAPE GASKET 250807 1 13 FOAM TAPE GASKET WOOFER MOUNT 250808 1 14 LOGO BLACK CABINET LOGO WHITE CABINET 250806 03 250806 04 1 15 GASKET 134mm RD ADH BACKED 290315 001 1 16 SCREW TAPP 8 11X 5 PAN ASY SQ 290306 08 17 17 SCREW TAPP 8 11X1 0 P...

Page 8: ...ITE 255901 01 255901 02 1 pkg of 2 2 70V 100V TRANSFORMER ONLY 254426 2 3 HARDWARE KIT ENV 4 PACK BLACK HARDWARE KIT ENV 4 PACK WHITE 290307 003 290307 004 1 4 BAG POLY HDPE 18X26 1 MIL 255354 001 1 4 5 PACKING END CAP TOP 250809 1 6 PACKING END CAP BOTTOM 250810 1 7 CARTON RSC 255902 001 1 8 PACKAGING CREASE SHEET 255903 1 9 INSTALLER GUIDE 255917 1 10 COMMITMENT LETTER 251001 1 ...

Page 9: ...ven By Pages Affected 8 02 00 Document release revision 00 Service manual release All Unknown 00 to 01 ECN 33972 and 33783 6 7 02 06 01 to 02 Added RoHS part numbers This product is now built with RoHS compliant parts 6 7 1 SERVICE MANUAL REVISION HISTORY ...

Page 10: ...ifications and Features Subject to Change Without Notice Bose Corporation The Mountain Framingham Massachusetts USA 01701 P N 257475 REV 02 2 2006 For Technical Assistance or Part Orders Call 1 800 233 4408 ...

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