michael chuaMay 4, 2018Car Subwoofers10", Car Subwoofers, PW1090, Pyramid, Vintage Pyramid PW1090-US Thiele & Small Parameters Recommended for In-Car Use Ported Box 55 liters. F3=57Hz Ported Box 25 liters. F3=60Hz Ported Box 35 liters. F3=53Hz Sealed Box 10 liters. F3=100Hz. Q=0.75 Sealed Box 15 liters. F3=105Hz, Q=0.63 Sealed Box 20 liters. F3=115Hz, Q=0.56
