Introduction
Has your Marshall Woburn been having trouble with lower-pitched audio? If so, here is the guide on how to remove the two subwoofers. All you need is the standard #1 Phillips Screwdriver head to remove the screws involved with this replacement.
Tools
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            On a flat surface, orient the device so that the front grille is facing downward. 
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            Using a Phillips #1 screwdriver, remove the ten outer 28.6 mm screws marked in red. 
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            Remove the eight inner 28.6 mm screws with the Phillips #1 screwdriver. 
 
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            Lift the back input board slightly above the back panel. 
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            Rotate the input board so that you can slide it into the hole in the back panel that it came from. 
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            Fully slide the input board through the back panel and set it down gently inside the speaker. 
 
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            Grab the panel by the large hole and lift one side until you can fit your hand under. 
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            Use your hand to fully remove the back panel from the rest of the frame. 
 
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            Remove the two 12.7 mm screws marked in red from the front of the back input panel with a Phillips #1 screwdriver. 
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            Remove the power input from the back side of the panel. 
 
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            Using a Phillips #1 screwdriver, remove the eight 15.8 mm screws attaching the subwoofers to the frame. 
 
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To reassemble your device, follow these instructions in reverse order.