Media Sub
Single 5.25" Powered Multimedia Subwoofer
TECHNICAL MANUAL
JBL Consumer Products Inc.
250 Crossways Park Dr.
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Rev B 4/02
Powered Subwoofer |
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Media Sub |
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TABLE OF CONTENTS
FEATURES..................................................................... |
1 |
SPECIFICATIONS.......................................................... |
1 |
MEDIA SUB EXPLODED VIEW ................................... |
2 |
DISASSEMBLY PROCEDURES ................................... |
3 |
BLOCK DIAGRAM ......................................................... |
4 |
PCB 1 & 2 (viewing trace layer through the board) ..... |
5 |
PCB 1 & 2 (viewing silk-screen through the board) ..... |
6 |
PCB 3 (viewing trace layer through the board) |
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PCB 3 (viewing silk-screen through the board) ............ |
8 |
ELECTRICAL PARTS LIST ........................................... |
9 |
PACKAGING EXPLODED VIEW................................. |
11 |
INTEGRATED CIRCUIT DIAGRAMS .......................... |
12 |
SCHEMATIC DIAGRAM .............................................. |
13 |
FEATURES
Powered subwoofer system.
25 watt amplifier.
Auto turn-on / turn-off circuitry.
Subwoofer is magnetically shielded for flicker-free use near computer monitors.
Built-in electronic equalization for proper frequency balance with satellite speakers.
Line level stereo output for use with satellite speakers that don’t have a subwoofer output.
SPECIFICATIONS
Speaker System. . . . . |
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Sixth band-pass enclosure |
Speaker Size. . . . . . |
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5.25” woofer |
Total Amplifier Output Power |
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25W at 10% THD |
Input Sensitivity . . . . . |
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250mV input for full power |
Frequency Response . . . |
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40Hz - 150Hz |
Input Impedance . . . . |
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10k ohms |
Signal Output jack . . . . |
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Stereo miniplug jack (1/8") |
Signal Input Jacks . . . . |
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Stereo miniplug jack (1/8") |
External Dimensions
Height . . . . . . . . . . . . . . 10.25"
Width . . . . . . . . . . . . . . 7.35"
Depth . . . . . . . . . . . . . . 12"
Weight . . . . . . . . . . . . . . 12.8 lbs.
External Dimensions (metric)
Height . . . . . . . . . . . . . . 260mm
Width . . . . . . . . . . . . . . 186mm
Depth . . . . . . . . . . . . . . 305mm
Weight . . . . . . . . . . . . . . 5.8 kgs
1
MEDIA SUB EXPLODED VIEW
Powered Subwoofer |
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Media Sub |
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DISASSEMBLY PROCEDURES
Step 1
Remove the 8 purchase screws (S6) from the rear plate to separate the rear plate and the wood cabinet.
Step 2
Unplug the connector speaker wire from the PCB amp assembly.
Step 3
Remove the 4 purchase screws (S5) from the rear plate to separate the rear plate and cover.
Step 4
Remove the power/volume knob from the rear plate.
Step 5
Remove the 4 purchase screws (S2) and nuts (N1) to separate the rear plate and transformer assembly.
Step 6
Remove the 2 purchase screws (S3) from the bracket and the 2 purchase screws (S4) and nuts (N2) from the IC of STK4024 to separate the rear plate and Amp assembly.
Step 7
Remove the 4 purchase screws (S1) from the driver inside the wood cabinet to separate the wood cabinet and the driver.
3
BLOCK DIAGRAM
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