Re: Coaxial Wedge Collaboration
When a port is located next to a wall/side the effective length is longer than the actual length. This is what you are seeing.
The actual effect depends on a number of factors-how close it is to the wall, the size of the port and so forth.
This morning I removed the internal port tunnels. Only ~43mm of tunnel from the front support and front plywood remained.
The impedance trace showed a dip (and 0 degrees phase) at 57 Hz - finally.... (Updated CAD drawing attached.)
However bass reflex calculators all say that the port length should be closer to 92mm.
Could there be an effective lengthening of the port on the inside caused by two sides of the port continuing on? I.e. the cabinet floor and side-wall?
Thanks,
When a port is located next to a wall/side the effective length is longer than the actual length. This is what you are seeing.
The actual effect depends on a number of factors-how close it is to the wall, the size of the port and so forth.