I get 94mm length (WinISD) for a single 65mm dia. port, tuned to 50Hz. The 190mm length came off the Fostex recommended bass reflex tuning right? That would be for a 28l box, tuned to 39Hz.
They would be ~56mm long for two.
jeff
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If better sound is desired use one port.I am building a FF225WK which calls for a port of 65mm diameter and 190mm length.
Can I use 2 ports of 35mm and keep the same length?
What are the rules for changing port diameter?
Thanks in advance!
Have you built the box already? I am also interested in using the FF225WK together with a helper tweeter. Can you comment on the LF output?
http://p10hifi.net/FAL/downloads/ChangingPortSize.pdf
http://www.diyaudio.com/forums/atta...12-enclosure-design-effective-port-length-jpg
More in-depth port end correction:
End correction formula for rectangular port ?
http://web.archive.org/web/20070729...blications/msm-2001-2/msm2001-2-corrected.pdf
GM
http://www.diyaudio.com/forums/atta...12-enclosure-design-effective-port-length-jpg
More in-depth port end correction:
End correction formula for rectangular port ?
http://web.archive.org/web/20070729...blications/msm-2001-2/msm2001-2-corrected.pdf
GM
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