Read JBL MUSIC 20 SUB Service Manual online
1
Powered Subwoofer
BASS20
TABLE OF CONTENTS
Specifications .................................................................1
Features..........................................................................1
Powered Sub Test Setup...............................................2
Test Procedure...............................................................3
Important Service Note ..................................................4
Block Diagram ................................................................5
Amplifier Exploded View ................................................6
Cabinet Assembly Exploded View .................................7
Parts Lists.......................................................................8
Packaging View............................................................10
Printed Circuit Boards .................................................11
Integrated Circuit Diagram ...........................................13
Schematic Diagrams ...................................................14
SPECIFICATIONS
Amplifier Power (RMS)
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150 Watts
Low Frequency Woofer (2) .
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8 1/2"
Design.
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Bass reflex enclosure, Grey or White
Inputs .
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Line Level and Speaker Level
Outputs
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Full Range Speaker
Crossover Frequency .
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120Hz
Frequency Response .
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40Hz - 120Hz (+/-3dB)
External Dimensions (Inches)
Height .
Height .
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17-3/4"
Width .
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10"
Depth .
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24"
External Dimensions (mms)
Height .
Height .
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451
Width .
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254
Depth .
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610
Weight.
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42lbs (19.1kg)
FEATURES
n
The Bass20 powered subwoofer is part of the SCS120 or
MUSIC 20 System.
MUSIC 20 System.
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150 watt output.
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Variable level control.
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Line level or Speaker level inputs, outputs for full range
satellite speakers.
satellite speakers.
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User friendly “auto on” circuit. Signal sensing
automatically turns the subwoofer on so you don't have
to; the subwoofer is meant to be left “on” without
continual use of the power switch.
automatically turns the subwoofer on so you don't have
to; the subwoofer is meant to be left “on” without
continual use of the power switch.
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