Bose 300 pm service manual supplement details crossover change s1

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2 PROPRIETARY INFORMATION 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. CONTENTS Specifications ............................... 3 Supplement Description ................... 3 Disassembly/Assembly Procedures ............... 4-5 Test Procedures ...................... 6 Figure 1. Model 300PM Loudspeaker Test Setup Diagram .............6 Figure 2. Model 300PM Loudspeaker Crossover Assembly Topside and Etch Layout Diagram ..7 Figure 3. Model 300PM Loudspeaker Driver Wiring Diagram ............7 Figure 4. Model 300PM Loudspeaker Crossover Assembly Schematic Diagram .......8 Model 300PM Loudspeaker Crossover Assembly Part List (see Figure 5) ........ 9 Figure 5. Model 300PM Loudspeaker Crossover Assembly Layout Diagram .........9 Model 300PM Loudspeaker Part List (see Figure 6) ................. 10 Figure 6. Model 300PM Loudspeaker Exploded View ..................10 Model 300PM Loudspeaker Packing Part List (see Figure 7) ................ 11 Figure 7. Model 300PM Loudspeaker Packing Diagram ................11 Model 300PM Loudspeaker Accessories ........................... 12 Figure 8. CB-22 bracket ....................................12 Figure 9. GBB-1 bracket ...................................12 Figure 10. GWS-20 bracket ...................................12 CAUTION: THE MODEL 300PM LOUDSPEAKER CONTAINS NO USER-SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE.

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3 SPECIFICATIONS Impedance:6W Nominal, 4.8W minimum from 20Hz to 20kHz. Frequency Range:60Hz to 16kHz, ±3dB Beamwidth:Vertical: 132û Horizontal: 185û Port (each side):Flared slot port tuned to 60 Hz. Shading Network Assembly:10uF capacitor with 0.065 mH series inductor Internal Cabinet Volume:5.7 Liters (347 cu.in.) net External Dimensions:12.83"L x 8.43"D x 7.25"H (32.6cm x 21.4cm x 18.42cm) Sensitivity (1W, 1m):83.8dB SPL (calculated), free field, per IEC-268-5 (for octave- band centered at 400Hz). Power Handling:100W (24.5 Vrms) continuous Weight:11.5 lb (5.2 kg) each Shipping Weight:25.5 lb (11.6 kg) per packed pair SUPPLEMENT DESCRIPTION This supplement reflects changes made in the Crossover Assembly of the Model 300PM Loudspeaker. The SmartProtect Crossover Assembly, part number 187241-001 has been replaced with part number 187225-001. You will need to use this supplement if you find that the Crossover Assembly is the one described in this supplement. If the loudspeaker you are repairing uses the SmartProtect Crossover Assembly, you will need to use the original Model 300PM Loudspeaker service manual part number 193626.