Panasonic SA-PM54

2.6. Disassembly of Woofer
Follow (step 1) in item 2.2.
Follow (step 1) to (step 4) in item 2.3.
Step 1: Remove 4 screws.
Step 2: Insert the steel rule in between the woofer and rear
cabinet as arrow shown.
Step 3: Detach the red (+) and black (-) wires.
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SB-PM54GN