DAHLQUIST DQ-10 or Original LARGE ADVENT WOOFER with Masonite (10" woofer in 12" frame) Tested/Working. Fully tested sounds great no rubbing.  Surrounds replaced recently by a professional with the proper concave surrounds. Tests 5.2 DCR on the Sperry multi-meter. Please review photos carefully this is for the original large advent with masonite. Buy with confidence from a proven vintage audio eBay seller with over 3000 satisfied customers with 100% positive feedback and Outstanding Detailed Seller Ratings. Thanks for looking!