Hello all,
I'm in the early modeling stages for a 10" ported sub build. Based on my design parameters and port diameter (4") I'm expecting to need to port the bottom of the enclosure. So far I've found some online threads at various sites stating something similar to the following...
I'm in the early modeling stages for a 10" ported sub build. Based on my design parameters and port diameter (4") I'm expecting to need to port the bottom of the enclosure. So far I've found some online threads at various sites stating something similar to the following...
- The distance between the floor and the port should roughly be equal to the port's diameter.
- The distance between the floor and the port can effectively "lengthen" the port and lower the tuning of the enclosure.
- At what height would the floor no longer affect the port's length? (i.e., if I do make feet that are 4" high would that mean that the tuning frequency would be unaffected?)
- If the port to floor distance does affect the tuning of the enclosure how can I calculate how to use this to my advantage? Precision Port's calculator tells me that for a 4" port I'd need about 25" of port length for a 2 cu^ft enclosure tuned to 25 Hz. Can I use the distance between the port opening and the floor in a way where I can shorten the length of the port inside the enclosure and still achieve a box tune of 25Hz?
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