The following enclosure sizes are recommended for PowerPlant Subwoofers
PP-SW120 PP-SW150
PORTED
Volume (litres) 34 51
Volume (cuft) 1.2 1.8
Port diameter 101mm / 4" 101mm / 4"
Port length 348mm / 13.73" 350mm / 13.75"
Tuned frequency (Hz) 40 33.5
SEALED
Volume (litres) 22.45 40
Volume (cuft) 0.8 1.4
Tuned frequency (Hz) 75 80