General Discussion General discussion about all things car audio, from pioneer, orion, alpine and eclipse.

ported vs sealed

Old 02-12-2007, 10:24 PM
  #1  
50 Watt CAFz'r
Thread Starter
iTrader: (1)
 
trystin123's Avatar
 
Join Date: Dec 2006
Posts: 94
ported vs sealed

i know alot of you will think this a dumb question but wat is the diff between ported and sealed like i know as much as holes and no holes but sound reasond like i have a infinity 12 in a ported box wat if i put it in a sealed box whats the diference
trystin123 is offline  
Old 02-12-2007, 10:31 PM
  #2  
500 Watt CAFz'r
iTrader: (4)
 
FusionMadsen's Avatar
 
Join Date: Jun 2006
Posts: 883
Sealed: Smaller box, more "full" sound (in my opinion). Great for SQ.

Ported: Larger box, ports, sound can be tuned to certain frequencies, Great for SPL and can sound GREAT if done right in SPL.
FusionMadsen is offline  
Old 02-12-2007, 10:43 PM
  #3  
50 Watt CAFz'r
iTrader: (1)
 
sirsleepsalot's Avatar
 
Join Date: Nov 2005
Posts: 233
A sealed box is really the simplest type of box to make. Just stay close to the recommended air volume, and you'll get "optimum" sound out of your sub. The air inside the box will act as an extra suspension element for the driver and make for a much more controlled sound. This comes at the cost of low-frenquency sounds. The sub won't play as low as with a ported box. The less air volume in the box, the tighter your sound will be, but, you're always sacrificing lower frequencies.

A ported box on the other hand, will use the port for extra resonnance in it's tuned frequency range. Generaly, this will extend the low frenquency range of your sub, but, since the air moves freely in and out of the box, the sub relies entirely on the amp and it's mechanical suspension elements (spyder and surround) for the controlled movement of the sub. This is why, generaly, a ported (or vented) box won't normaly have as much of a tight/defined sound as in a sealed box. A ported box is a lot more work to get right, it can make or break a sub.

I hope this helps a bit, you can do a search as well, I'm sure the topic's been covered time and time again...

An installer I know told me today about a different type of box. A transmission line or something like that... and, in theory it sounds pretty good, but, if I understood it properly, I'd need something like a 6 c.f. box for a pair of 6" woofers. But, It would give the same impact as a pair of 12" subs. But, a pair of twelves would only take up like 2 c.f.... I'll look more into this when I get some time...
sirsleepsalot is offline  
Old 02-12-2007, 10:55 PM
  #4  
50 Watt CAFz'r
iTrader: (3)
 
Join Date: Oct 2006
Posts: 192
Originally Posted by sirsleepsalot
since the air moves freely in and out of the box, the sub relies entirely on the amp and it's mechanical suspension elements (spyder and surround) for the controlled movement of the sub.
The port resonates in phase with the driver at the tuning frequency, providing the extra SPL at and around that frequency. Because the port's resonance is in phase with the driver, the driver moves very little.

Below or above that range, however, you are right in that the sub moves as if it were in freeair, although it's not *quite* as if it were in free air.
Viperoni is offline  
Old 02-12-2007, 11:03 PM
  #5  
50 Watt CAFz'r
iTrader: (1)
 
sirsleepsalot's Avatar
 
Join Date: Nov 2005
Posts: 233
True... I forgot about the fact that the resonnance frequency was it's point of highest effeciency...

I've been up for 20 some hours... gimme a break ! :P hehe
But, thanks for the clarification...
sirsleepsalot is offline  
Old 02-12-2007, 11:30 PM
  #6  
50 Watt CAFz'r
 
Join Date: Feb 2007
Posts: 89
there are also Bandpass Enclosures , i had one that worked awesome until the Plexiglas cracked and haven't gotten a new piece also its for duel 10" and i have a 12" now

it sorta depends on application
Brad The Best is offline  
Old 02-13-2007, 07:44 AM
  #7  
500 Watt CAFz'r
iTrader: (12)
 
df.dima's Avatar
 
Join Date: Jul 2004
Posts: 643

Last edited by df.dima; 02-13-2007 at 07:56 AM.
df.dima is offline  
Old 02-13-2007, 12:29 PM
  #8  
50 Watt CAFz'r
 
Join Date: Jan 2007
Posts: 149
Other than what has been said, contrary to popular belief ported boxes are not better for low end. large sealed boxes will hit the lows the best right down into the subsonic (<20hz) and play fairly flat as well to boot.
Keswick R/T is offline  
Old 02-13-2007, 01:00 PM
  #9  
500 Watt CAFz'r
 
Rockney's Avatar
 
Join Date: Jan 2004
Posts: 609
OMG.. hide this post before Dukk see's it..
Rockney is offline  
Old 02-13-2007, 02:43 PM
  #10  
Administrator
 
Dukk's Avatar
 
Join Date: Feb 2006
Posts: 16,855
Lightbulb

....but it was too late....


I see the SEARCH feature has been mentioned..
Dukk is offline  

Thread Tools
Search this Thread
Quick Reply: ported vs sealed


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.