Check the listing for details. *USA* EV KD3 CENTURION DETAILED EV Speaker Plans. Listed at 24.00 USD. This Auction is for Electro-Voice CENTURION Building Plans. 22 pages total. You won't find more complete information anywhere than here about this vintage enclosure the EV CENTURION.You get the following: The Centurion is a exclusive Electro-Voice "W" type Folded Horn design, The "W" horn is a single path indirect radiator utilizing the room corner and is designed for a 15 inch woofer. The low frequency response is increased by 6 db by placing in the corner of a room. ( 200 hertz and below) 1. Do it yourself Build the CENTURION 22 Pages INCLUDING Mechanical Drawings as pictured. 2. Specifications and Instructions CENTURION Enclosure, 2 pages.The quality of this book is as follows: Each Page is scaned from the original document and Cleaned up using Adobe Photo Shop Each Page is scanned at 600dpi for Clarity. Each Page is in Printed in Color. The Blue Print is also scanned at 1200 dpi. ALSO SEE MY OTHER EV SPEAKER PLANS SEEN IN LAST PICTURE. "A CLASSIC, VINTAGE AMERICAN PRODUCT REBORN IN THE USA"