Bose FreeSpace 1B Manual
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Specifications ................................................................................................................................... 1
Product Description ......................................................................................................................... 2
Disassembly/Assembly Procedures .............................................................................................. 3
Test Procedures ............................................................................................................................... 4
Figure 1. Test Setup Diagram ......................................................................................................... 4
Figure 2. Crossover Top Side and Etch Layout ............................................................................... 5
Figure 3. FreeSpace
Figure 4. FreeSpace Model 1B Acoustimass Module Assembly Diagram ...................................... 6
Part List .......................................................................................................................................... 7-8
FreeSpace Model 1B Acoustimass Module (Per Figure 4) ........................................................... 7
Figure 5. FreeSpace Model 1B Acoustimass Bass Module Rear Panel Label ............................... 7
Figure 6. FreeSpace Model 1B Acoustimass Module Crossover Assembly ................................... 8
Packing List ...................................................................................................................................... 9
FreeSpace Model 1B Acoustimass Module (Per Figure 7) ........................................................... 9
Figure 7. FreeSpace Model 1B Acoustimass Module Packing Diagram .......................................... 9
External Dimensions:
Weight:
Transducer Complement:
Power Handling:
Usable Frequency Range:
Sensitivity: Pink Noise:
IEC Noise:
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.

TABLE OF CONTENTS

®
Model 1B Acoustimass

SPECIFICATIONS

PROPRIETARY INFORMATION
®
Module Schematic Diagram .................................. 5
Bass Module: 19" x 14" x 7.5"
Packed System: 26.2" x 19.8" x 10.6"
Bass Module: 18.7 lb
2 - 5 1/4" Woofers
100 Watts per channel
Bass Box: 55 Hz to 200 Hz
76dB-spl, 1 Watt @ 1 Meter
78.6dB-spl, 1 Watt @ 1 Meter
1

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Summary of Contents for Bose FreeSpace 1B

  • Page 1: Table Of Contents

    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.
  • Page 2: Product Description

    PRODUCT DESCRIPTION ® ® The FreeSpace Model 1B Acoustimass Module is a passive bass unit with a crossover at 200 Hz. The crossover will feed four (two per channel) 8Ω impedance, or eight (four per channel) 4Ω impedance FreeSpace Model 6 loudspeakers. It offers several advantages over a powered bass box system.
  • Page 3: Disassembly/Assembly Procedures

    DISASSEMBLY/ASSEMBLY PROCEDURES Note: Refer to Figure 4. for the following 3. Crossover Removal procedures. 3.1 Remove the six screws (5) that secure 1. Driver Removal the rear cover (8) onto the Acoustimass Bass Module. 1.1 Remove the six screws (5) that secure the rear cover (8) to the cabinet.
  • Page 4: Test Procedures

    TEST PROCEDURES 1. Rub and Tick Test 3.3 Sweep the oscillator from 10 Hz to 500 Hz. Sweep rate shall be 3-5 seconds. 1.1 Perform Disassembly/Assembly Listen carefully for buzzes, rattles, or other Procedure 1.1-1.4 in order to gain access to noises.
  • Page 5: Module Schematic Diagram

    Figure 2. Crossover Top Side and Etch Layout INPUT FROM AMPLIFIER SATELLITES LEFT (RIGHT) WOOFER BLACK BLACK Figure 3. FreeSpace ® Model 1B Acoustimass ® Module Schematic Diagram (one channel shown)
  • Page 6 Top View 11 (2x) (2x) Front View (8x) (2x) (6x) (6x) (2x) 10 (2x) Exploded View Figure 4. FreeSpace ® Model 1B Acoustimass ® Module Assembly Diagram...
  • Page 7: Part List

    PART LIST ® ® FreeSpace Model 1B Acoustimass Module (Per Figure 4) Item Description Part Number Qty. per Number Assy. Gasket, Woofer, 6.5" 104794-08 Woofer Assy., 5.25 ", AM-5 P III 172276 Screw, Tapp, 8 - 11x .75, PAN, 172672-12 XRC/SQ Grommet, Grille, .635"...
  • Page 8: Freespace Model 1B Acoustimass Module Crossover Assembly (Per Figure 6)

    PART LIST ® ® FreeSpace Model 1B Acoustimass Module Crossover Assembly (Per Figure 6) Reference Item Description Part Qty. per Designator Number Number Assy. C1, C2 Cap, El, BP, 85, 50V, 20%, 100uF 142065 J2, J3 Connector, Header, Inline, 2 Position 133220-02 Conn, Header, 12 Pin, .200, Vert 187902-12...
  • Page 9: Packing List

    PACKING LIST ® ® FreeSpace Model 1B Acoustimass Module (Per Figure 7) Item Description Part Number Qty. per Number Assy. Packing, Corner Post, Bass Mod. 148044 Packing, Corner Post, Bass Insert 148364 Bag, Poly, 13.5 x 35 x 9.5 x 1 Mil 114522 Packing, Crease Sheet, S/W 190555-001...
  • Page 10 ® ® ® FREESPACE MODEL 1B ® ACOUSTIMASS MODULE Service Manual © 1997 Bose Corporation Part Number 191983 REV 00...
  • Page 11 SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE ® ® Bose Corporation The Mountain Framingham Massachusetts USA 01701 P/N 191983 REV. 00 08/97 FOR TECH. ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008...

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