Simple shallow hide-away subwoofer box to the trunk.
OEM Opel Astra J Sports Tourer audio upgrade project is moving on.
More details to floor panels. Subwoofer box is almost done, only 10" subwoofer it self is still missing.
Link to the playlist of my audio upgrade project:
• Astra J OEM audio upgr...
#carhifi #opel #opelastraj #project
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