ported vs sealed
#1
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
#3
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 6¾" 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...
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 6¾" 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...
#4
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.
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.
#7
have our search feature broken on the forum?
http://www.canadiancaraudio.com/online/general-discussion/20224-sealed-ported.html
http://www.canadiancaraudio.com/online/enclosure-design-construction-help/16606-ported-vs-sealed.html
http://www.canadiancaraudio.com/online/general-discussion/2901-sealed-ported.html
other:
Speaker Enclosure Volume Calculator
JL Audio
JL Audio
http://www.canadiancaraudio.com/online/general-discussion/20224-sealed-ported.html
http://www.canadiancaraudio.com/online/enclosure-design-construction-help/16606-ported-vs-sealed.html
http://www.canadiancaraudio.com/online/general-discussion/2901-sealed-ported.html
other:
Speaker Enclosure Volume Calculator
JL Audio
JL Audio
Last edited by df.dima; 02-13-2007 at 07:56 AM.