Usher 8137A Kevlar/Carbon Fiber 7″ Woofer
USHER 8137A Thiele & Small Parameters Thiele & Small Parameters (before Break-in) Ported Box=35 liters • Fb=41Hz • System Q=0.65 (Manufacturer’s T/S) Sealed Box=35 liters • F3=60Hz • System Q=0.65… Read more >