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hector.murray
06-25-2005, 12:16 PM
I have some questions regarding enclosure design.
I have noticed that for a given driver in a series of enclosure designs, that, while maintaining Fb, while increasing Vb and keeping a circular port diameter constant, port length decreases.
For example
LE10A
Fb 32Hz
Vb 1.6 cu ft
Port dia 3.0"
Port length 9.1 "

contrast this with:
LE10A
Fb 32
Vb 2.1 cu ft
Port dia 3.0"
Port length 6.2

The larger box allows a shorter ductand it appears that group delay is somewhat reduced. Is there an acoustic downside to this?

DavidF
06-25-2005, 06:40 PM
The larger box allows a shorter ductand it appears that group delay is somewhat reduced. Is there an acoustic downside to this?

I can not think of one. In fact, longer ports are more likely to cause problems if the length exceeds the diameter by a factor of 3 or more.

DavidF