First of all, sorry for asking these things again, I hope I donīt misuse this thread!
So the formula didnīt take the three inductances into account, right? So the 28hz tuning is without the crossover and in reality tuning frequency will raise from 28hz to 32hz because of the resistance of the inductors?
If I run the woofer without the passive crossover, I would have to shorten the ports a bit to reach a 32hz tuning, right?
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Sorry if I might mix up on things, but the thread-starter used a volume of 171 liters in the formula rather than your 135 liters.
Thatīs why he gets 28hz tuning and you get 32hz tuning with the same port-length?
Or does the 2404 enclosure uses a different woofer-type?
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Iīve looked at this page for the specs on the TAD woofers:
http://www.technicalaudiodevices.com/lf-units
QTS is 0,34 for
TL-1601a and
TL-1603, but is 0,31 for
TL-1601b. FS and VAS is very similar on all of them.
Thatīs why I was thinking
1603 is closer to
1601a than to
1601b...
Btw; can I simply copy the value of the
End correction factor or how do I determine this figure for the formula for the 1603 ?
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Subtracting the panel thickness of 22mm from the outside dimension, I get 202,5 liters for the internal volume for the 2402 enclosure. Of course bracing, driver displacement and midrange-horn displacement has to be subtracted of that 202,5 liters, but my guess wouldīve been this could result in 20-30 liters. To result in a netvolume of ~130 liters the insides must occupy nearly 70 liters! Is the 2402 braced that heavily?
Donīt get me wrong, I do not want to argue with you or doubt knowledge as you have build a copy yourself, I just want to understand.
Originally Posted by Dr.db
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