Usher 8137A Kevlar/Carbon Fiber 7″ Woofer
Usher 8137A Thiele & Small Ported Box=100 liters. F3=30Hz Ported Box=55 liters. F3=40Hz Ported Box=45 liters. F3=40Hz Ported Box=35 liters. F3=47Hz Sealed Box=35 liters. F3=55Hz Sealed Box=55 liters. F3=55Hz, Q=0.71… Read more >