Posted by ronbrady [ 205.208.199.6 ] on April 22, 2005 at 00:18:38:
In Reply to: Ideal freq. to tune Fostex 206 cabinet posted by Peter Swartz on April 21, 2005 at 23:04:17:
Hi Pete
I ran a quick simulation on WinISD for you for the 206E and it looks like it really doesn't want to fit a 45liter cabinet smoothly without quite a lot of series resistance to raise the qts. from .18 to .40. I have tried this trick in the past and it works but I think that it robs some of the detail from the mids and highs but it should produce good bass. My results are a port tuning of 40Hz with a 3"ID tube 5.15" long.This will give a port velocity of Mach 0.15 . This alignment will require at least a 6 Ohm audio grade resistor in series with the driver.
You should be happy with this combination unless you are expecting to use a low powered amplifier at which case your efficiency will suffer terribly especially if you intend to install a baffle-step correction circuit.
Good luck with your project
Ron Brady
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