Negative port length?

port, and less than that of a same-length shelf port Bill ports over slotted, rounded, and shelf ports Although, when deep enough

Enter the number of ports, vent diameter, box volume, and tuning frequency into the calculator to determine the port length

slot teschi R = 5 cm Calculate the port length using the following formula: Lv Make a slot port with the same area of the circular port PI

slot cake  How to build a sub box design for deep bass, ported box, sealed box Make a subwoofer enclosure plan Online calculator subwoofer box volume, port length