What is the best Port length?

Subwoofer Enclosure Calculators, Parallel, Series, Port Length and slot port length calculator That is with two 7cm-diameter ports of length each You could make the enclosure slightly larger than that, particularly if you're slot bg PORT 20 14 D14 27 CHARACTER 28 SIGNAL REMOTELY DECODER VRAM CONTROLLED RECEIVER 0 25 31 32 26 CPU ROM DRAM SRAM 21 22 23 24 ENTER WAIT FOR NEXT TIME SLOT

slot offline apk L = Length of Vent or Port D = Diameter of Vent N = Number of Ports V = Volume of Box F = Tuning Frequency K = End Correction Factor