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Old School Polk Audio C4 Subwoofer - Four 6x9 Subs in Isobaric Teardrop Enclosure

• by admin 
• 25 views
• 6 years ago

Take a trip back to 1992 and see this technologically advanced automotive subwoofer up close and personal. The "C4" was a radical design at the time integrating two pairs of 6x9 su