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View Full Version : What causes box rise?



ascitiesburn69
12-15-2009, 07:52 PM
As the title says.
What causes a huge box rise?
Small box with a huge port? or huge port in general? or small airspace?
Discuss please. :D

tinmanchris217
12-15-2009, 08:03 PM
Old Thread (http://www.caraudio.com/forum/showthread.php?t=427166&highlight=impedance+rise) with lots of good info on it. Been discussed many times... but impedance is the dynamic resistance generally attributed to the AC current in the coil.

From my experience, small boxes cause more impedance rise, but also have a higher SPL peak.

One aspect to SPL tuning is finding a compromise between the two variables, to drop the impedance, to maximize amp power, while allowing the sub to efficiently produce a frequency.

SicAudio
12-15-2009, 08:05 PM
Old Thread (http://www.caraudio.com/forum/showthread.php?t=427166&highlight=impedance+rise) with lots of good info on it. Been discussed many times... but impedance is the dynamic resistance generally attributed to the AC current in the coil.

From my experience, small boxes cause more impedance rise, but also have a higher SPL peak.

One aspect to SPL tuning is finding a compromise between the two variables, to drop the impedance, to maximize amp power, while allowing the sub to efficiently produce a frequency.

^^^^^^^^^^^^^^^^^^^^
perfect answer
thread is now closed ;)

godhatescivics
12-15-2009, 08:09 PM
i heard that **** beads hanging from your port brings down box rise

aviator08
12-15-2009, 08:11 PM
Lol you have them 2?

MmatsDude
12-15-2009, 08:12 PM
Lmfao

tinmanchris217
12-15-2009, 08:13 PM
agreed, it stopped my box rise!

http://i94.photobucket.com/albums/l95/onequickcivic/analbeads.jpg

SicAudio
12-15-2009, 08:14 PM
must be a location thing lolz

godhatescivics
12-15-2009, 08:27 PM
must be a location thing lolz

agreed