What is the best Port length?

What is the best Port length? slot port area calculator Enter the diameter of the aero port and the total number of aero ports into the calculator to determine the total area slot drilling CALCULATE SUBWOOFER BOX PORT AREA & CONE AREA W COMPARISON INFO

slot drilling I adjusted the dimensions of that box to make it fit in my car and with a slot port I'm able to get my 28hz tuning frequency I really wanted to

slot lighting I have been working on a slot port calculator spread sheet for quite some time now As you can see port area, as well as port area per cubic Part 1 Slot port vs Aero port subwoofer box in depth comparison How To Build A Subwoofer