sealed box or ported question

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   Hi

   I am making some front loaded 18" boxes I was wondering what would happen if didn't port them? can somebody tell me  the pro's and cons of sealed and ported boxes?

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jruiz4659 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 31 October 2005 Location: United States Status: Offline Points: 12	Post Options Post Reply Quote jruiz4659 Report Post Thanks(0) Quote Reply Topic: sealed box or ported question Posted: 10 November 2005 at 2:38pm
	Hi I am making some front loaded 18" boxes I was wondering what would happen if didn't port them? can somebody tell me the pro's and cons of sealed and ported boxes?

LunchieTey Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 06 February 2005 Location: Australia Status: Offline Points: 934	Post Options Post Reply Quote LunchieTey Report Post Thanks(0) Quote Reply Posted: 10 November 2005 at 6:20pm
	It depends on the driver. If it's prosound 18's then you'll have low output and likely overexcursion unless the box is small(even less output) It's(sealed) almost never considered for sound reinforcement
	Speaker addict

kevinmcdonough Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 27 June 2005 Location: Glasgow Status: Offline Points: 3756	Post Options Post Reply Quote kevinmcdonough Report Post Thanks(0) Quote Reply Posted: 11 November 2005 at 4:34pm
	Sealed boxes are generally more 'HI-FI' in that they usually have a flatter frequency output over the range they produce. The bottom of their range is usually higher, but they're bass roll off is generally more gradual from this point. Ported boxes are usually much louder (as much as 10db in one system i looked at) and have a lower bottom end depending on where you tune the port, but once they reach this they roll off a lot sharper. kev