Some drivers are fine in a downfiring orientation, others aren't suitable. It depends on the stiffness of the suspension. A downfiring orientation can cause the cone to sag, resulting in a loss of excursion and output.
Sag = Cms x mms x 9.8
mms is in kg
The sag should be less than 5% of driver xmax
Sag = Cms x mms x 9.8
mms is in kg
The sag should be less than 5% of driver xmax
Timely. I'm about to build a small downfiring LT sub, and I was wondering about sag.
ReplyDeleteThankyou.
I used this calculation before building my downfiring subwoofers.
ReplyDeleteA little bit of additional background reading for anyone interested in an adireaudio whitepaper
Only place I can find it hosted now is here - http://www.facstaff.bucknell.edu/esantane/movies/DriverOrientation.pdf
You can find just about any old website at the Way Back machine:
ReplyDeletehttp://www.archive.org/index.php
Just search for www.adireaudio.com.au
Look at the pages around 2003. You'll find any Adire info that they had in the past.