michael chuaJuly 30, 2020Drivers Thiele & Small, PRO DRIVERS12", Celestion, Pro Woofer, TF1225 Celestion TF1225 Thiele & Small Parameters Thiele & Small Parameters (before Break-in) Ported Box=52 liters • Fb=60Hz (Manufacturer’s T/S) Ported Box=52 liters • Fb=50Hz (DATS x0.75) Ported Box=45 liters • Fb=60Hz (Manufacturer’s T/S) Ported Box=45 liters • Fb=50Hz (DATS x0.75) Updated on Dec 5, 2023