[. . . ] [. . . ] (liter) -3dB Point (Hz) Enclosure Damping Height -inch (cm) Width -inch (cm) Depth -inch (cm) 1. 25 (35. 40) 41 0. 83 14 (35. 56) 24 (60. 96) 10 (25. 40) Vb F3 Fb H W D P Ported Enclosure Recommendation Internal Area cu. (liter) -3dB Point (Hz) Tuning Frequency (Hz) Height -inch (cm) Width -inch (cm) Depth -inch (cm) Port Diameter and Length -inch (cm) 2. 0 (56. 63) 28 32 13. 5 (34. 29) 16. 5(41. 91) 23 (58. 42) 4 x 13. 2 (10. 16x 33. 53) NOTE: Internal volume is measured before speaker and/or port displacement. When using enclosures other than recommended, contact technical support or your local installation expert. Proper enclosure design is one of the key components to subwoofer performance and should be handled by experienced installers. [. . . ] [. . . ]