Panasonic SC-TM900DVD Service Manual page 191

Step 1: Remove 4 screws from Woofer.
Step 2: Remove Woofer by detaching the (+) white and (-) blue
wires.
1.4. Disassembly of Woofer
Follow (step 1) to (step 5) in item 1.1.
Step 1: Remove 4 screws from Woofer.
Step 2: Remove Woofer by detaching the (+) red and (-) black
wires.
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service m. speaker