Hello can someone tell me how much volume my sub needs in the closed and bass reflex housing ? it is a Rockford Fosgate T112D2 here the data Nominal Diameter 12 [305] Magnet weight 124 oz (3515 g) Frequency Range 31 Hz – 250 HZ Voice Coil Diameter 3.00 [72,2] Voice Coil Winding Width 1465 [37] Voice Coil Formeter Material Aluminium Nonimal Inpedec (2) 2 Ohms DC Resistac (Re) 3.1 ohms Voie Coil Inductans 2.8 mH Resonance Frequency (FS) 31 Hz Mechanical Q Factor (Qms) 4.4 6 Electrical Q Factor (Qes) 0.53 Total Q Factor (Qts) 0.47 COMPLIANCE (Cms) 1.15E-04 m/N EQUIVALENT AIR VOLUME (Vas) 1.229 FT^3 (34.8 LITERS) MOVING MASS (MMs) 7.87 oz (223.2 g) MECH. RESIST. LOSSES (RMs) 9.88 kg/s SENSITIVITY (SPL) W/M 86 dB 86 dB FORCE FACTOR (BL) 16.1 T-m EFFECTIVE CONE AREA (SD) 71 in^2 (0.046 m^2) PE 600 rms 1299 w peak Linear Exursion (X-MAX) 0.55 [14] EFF. Bandwidth Prod. (EBP) 58 KRM 47.29 mOhms Erm 0.641 Kxm 92.00 mH Exm 0.601 Rem, 12.86 Ohms see pdf file da stehth Prod. (EPP) 58 KRM 47.29 mOhms Erm 0.641 Kxm 92.00 mH Exm 0.601 Rem, 12. t all thanks again