michael chuaApril 20, 2023Drivers Thiele & Small, PRO DRIVERS8", 8PT-8, GRS, Woofer GRS 8PT-8 Manufacturer’s Specs Thiele & Small Parameters (before Break-in) Ported Box=24 liters • Fb=55Hz (Manufacturer’s T/S) Ported Box=24 liters • Fb=55Hz (DATS T/S) Ported Box=20 liters • Fb=55Hz (Manufacturer’s T/S) Ported Box=20 liters • Fb=55Hz (DATS T/S) Sealed Box=20 liters • F3=77Hz • Q=0.78 (Manufacturer’s T/S) Sealed Box=20 liters • F3=90Hz • Q=0.72 (DATS T/S) Updated on Dec 8, 2023