Actually, the Sd has nothing to do with the size of your transmission line, it is the Vas that matters*.
*(except in the very vague general sense that Vas tends to be larger for larger drivers)
You best chances of doing a good TL ar eto get Martin King's QuarterWave modeling SW...
dave
*(except in the very vague general sense that Vas tends to be larger for larger drivers)
You best chances of doing a good TL ar eto get Martin King's QuarterWave modeling SW...
dave
...and roughly size it using Martin's alignment tables. Or Augspurger's, if you can find them, and which complement Martin's in some areas. You can then run your TL through his worksheets if you wished to model it. As Dave says, the Sd of the driver basically has no actual relation to the necessary cabinet volume or taper requirements.
Alignment tables: http://www.quarter-wave.com/TLs/Alignment_Tables.pdf
General TL information: http://www.quarter-wave.com/TLs/TL_Anatomy.pdf
Alignment tables: http://www.quarter-wave.com/TLs/Alignment_Tables.pdf
General TL information: http://www.quarter-wave.com/TLs/TL_Anatomy.pdf
The choice of taper ratio has the most effect, it effects the length of the pipe, an SL/So of 0.1 will be shorter than SL/So =1 for example.
As SL/So becomes smaller the TL becomes more like an MLTL or a reflex box - this is probably where the most effect on sound will be? (I haven't built or compared MLTLs)
As SL/So becomes smaller the TL becomes more like an MLTL or a reflex box - this is probably where the most effect on sound will be? (I haven't built or compared MLTLs)
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