[. . . ] [. . . ] (liter) -3dB Point (Hz) Tuning Frequency (Hz) Height -inch (cm) Width -inch (cm) Depth -inch (cm) Port Diameter and Length -inch (cm) 1. 0 (28. 32) 27 33 13 ( 33. 02) 24 (60. 96) 9. 25 (23. 50) 3 x 15. 25 (7. 62x 38. 74) NOTE: Internal volume is measured before speaker and/or port displacement. External dimensions are based on the use of 3/4" (1. 9cm) material. The port can be placed on any fitting face as long as the port ends are not obstructed. When using enclosures other than recommended, contact technical support or your local installation expert. [. . . ] [. . . ]