formica Posted February 19, 2005 Share Posted February 19, 2005 ---------------- On 2/18/2005 9:01:08 AM colterphoto1 wrote: i'll just keep quiet then ---------------- It's not a simple subject... it only shows your interest of understanding the physics behind what we are being told. Quote Link to comment Share on other sites More sharing options...
DrWho Posted February 19, 2005 Share Posted February 19, 2005 When we meet tomorrow I'll be able to show you all the graphs in WinISD and you can see for yourself how many things change with the design of the cabinet and the nature in which they change. There's a crap load of things to think about all at once and there is no one system that maximizes the optimum value for each of them...which means a great big happy game of compromises (yay) Quote Link to comment Share on other sites More sharing options...
WMcD Posted February 19, 2005 Share Posted February 19, 2005 I posted the article which Klewless mentioned on 11/22/04 in technical questions. Gil Quote Link to comment Share on other sites More sharing options...
John Warren Posted February 19, 2005 Share Posted February 19, 2005 ---------------- On 2/17/2005 8:54:23 PM colterphoto1 wrote: The valley is caused by the woofer having a good air load on it because it is pumping air through the port; At the same time, driver excursion is very much reduced." ---------------- No, in fact the radiation resistance (your air load) at Fb is essentially nil. At the resonance frequency of the duct, the cone has to move ever so slightly to cause the acoustic mass presented by the duct to resonate (recall it is a "resonant system"). Since the coil is barely moving, the back EMF generated by the interaction of the coil with the B-field in the gap is small and thus the impedance of the driver at Fb is very close to the DC resistance of the coil. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.