michael chuaApril 30, 2018Car Subwoofers12", Car Subwoofers, PW1290, Pyramid, Vintage Pyramid PW1290-US Thiele & Small Parameters Recommended for In-Car Use Ported Box 75 liters. F3=49Hz Ported Box 45 liters. F3=50Hz Ported Box 55 liters. F6=40Hz Ported Box 55 liters. F3=47Hz Ported Box 75 liters. F3=43Hz Ported Box 100 liters. F3=40Hz Updated on July 22, 2018
