Mass Loading Woofer

[Moondog55]

While researching I came across this article; others may find it useful, I have to admit the math is more than a little beyond me.

http://www.birotechnology.com/articles/mass.html

It answered a couple of my questions so it may help others

 

[bjorno]

FYI: Mass loading a driver by applying weights will result in a higher Qts and a lower fs and is often not a good idea or combination but a method that is changing Qm to lower Ots instead is often more useful:

http://www.diyaudio.com/forums/showthread.php?postid=976183#post976183


http://www.diyaudio.com/forums/showthread.php?postid=1120919#post1120919

b

 

[Moondog55]

Thanx Bjorno; but in this particular instance I was interested in raising Qts and Qms to adapt a particular driver to a sealed box, I have used passive methods in the past with mixed and variable results, but sometimes cash flow and budget retraints mean we have to use what is already on the shelf.
Much better to buy a driver that meets my needs but WAF gets in the way sometimes and SWMBO holds the purse strings this month