michael chuaMay 3, 2018Car Subwoofers10", Car Subwoofers, GT1041, JBL JBL GT1041 Thiele & Small Parameters Measured Thiele & Small Parameters Recommended for In-Car Use Ported Box 65 liters. F3=37Hz Ported Box 35 liters. F3=40Hz Ported Box 55 liters. F3=33Hz Ported Box 75 liters. F3=30Hz Sealed Box 25 liters. F3=53Hz, Q=0.83 Sealed Box 35 liters. F3=52Hz, Q=0.75 Sealed Box 45 liters. F3=52Hz, Q=0.70 Sealed Box 55 liters. F3=55Hz, Q=0.66 Bandpass Box 35 liters. F3=40Hz-120Hz