frontfiring or downfiring for sealed??? - AVS Forum

AVS Forum > Audio > DIY Speakers and Subs > frontfiring or downfiring for sealed???

DIY Speakers and Subs

crackyflipside's Avatar crackyflipside
03:18 PM Liked: 10
post #1 of 5
02-19-2006 | Posts: 2,186
Joined: Oct 2005
Im going with a 12" sevo sub and I would like to know which placement of the driver is better for home theater with a sealed enclosure?

Front firing
http://www.stealthsoundsystems.com/SUB-12A.jpg

Down firing
http://www.3dsoundsurge.com/reviews/..._bottom_sm.jpg
bobgpsr's Avatar bobgpsr
04:31 PM Liked: 10
post #2 of 5
02-19-2006 | Posts: 2,733
Joined: Jun 2004
A bit tongue in check ---- downfiring is better for less intermod (doppler) distortion. ;)

Another factor is that the cone is safely out of the way --- from tots.

More serious is that all subs will eventually sag so some opine that not down/up firing is better for longevity. And gravity takes the center of the voice coil out of its most optimum neutral position, thereby sacrificing some Xmax (which can make it more subject to distortion at max power/SPL levels).
Darin's Avatar Darin
05:37 PM Liked: 10
post #3 of 5
02-19-2006 | Posts: 5,999
Joined: Aug 2002
FWIW, I did the calculations to figure a driver's suitability to vertical mounting for the TC sounds drivers the Rythmik kit uses, and they were WELL within the acceptable "sag" limit. Can't remember the exact amount, but it was at LEAST 1/4 the "acceptable limit.
kramskoi's Avatar kramskoi
05:49 PM Liked: 26
post #4 of 5
02-19-2006 | Posts: 507
Joined: Dec 2005
as noted, their may be some miniscule drawbacks to down-firing but i think it's more a matter of aesthetics. The subwoofer operates over such a limited range (especially depending on the x-over point and slope) that doppler/IM distortion, though real, is almost negligible in the real world. Personally, i've always been fascinated with watching the driver push and pull. ;)
crackyflipside's Avatar crackyflipside
07:47 PM Liked: 10
post #5 of 5
02-19-2006 | Posts: 2,186
Joined: Oct 2005
Quote:
Originally Posted by kramskoi
as noted, their may be some miniscule drawbacks to down-firing but i think it's more a matter of aesthetics. The subwoofer operates over such a limited range (especially depending on the x-over point and slope) that doppler/IM distortion, though real, is almost negligible in the real world. Personally, i've always been fascinated with watching the driver push and pull. ;)
So very true. I see myself going the front firing route for aesthetics also, but I also cant stand seeing those cloth grills covering up the perrty drivers. :D
Closed Thread DIY Speakers and Subs

Subscribe to this Thread

Powered by vBadvanced CMPS v3.2.3