sealed vs ported debate. who is right

[Onebadsrt 10+ year member]

k so me and some guys that are helpin me build my box have a on going debate between which is better, we all agree that sealed does produce a little better SQ, but heres the disagreements.

1 says ported will sound awful with 3 750watt subs and that he can make a sealed box almost as loud and still hit low notes...... what do you think about that??

another is the oppisite that ported will still have good SQ and be MUCH louder than sealed could ever be. he swears at least4-5dbs. do you agree??

both these guys do audio for a living, im just in the middle tryin to figure out what to do lol

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[GAM3OVR 5,000+ posts]

usually for subwoofers that are build to work in both

a ported enclosure will yield less power handling, but a 3-4 dB gain in spl output

ported enclosure are all about efficiency. Get as loud as you can, for less power. (as the port works like a passive radiator)

 

[Etac 10+ year member]

a badly designed ported box will sound worse than a sealed.. a well designed ported box can come close to amtching the SQ of a sealed with higher (lower) output.. also depeneds on the sub, car

also sealed can usually take more power, as long as thermal limits arent in the way... a ported box will bottmo out easier below its tuning freqency

 

[WildSebring 10+ year member]

Not matter of whos right and wrong IMHO.

If you want a little more SQ and tight punchy bass, go sealed. If you don't have SQ in mind, the ported enclosure will be a little louder, but still retain a small amount of SQ, depending on power, subs and box.

But the ported will be louder, now 4-5dB's...? Maybe, all in the box.

 

[Onebadsrt 10+ year member]

well its gonna be 3 kicker cvx 12s, 750rms,

but they will only be powered buy 1 kicker vx1500.1

 

[gunz4me 10+ year member]

In that case, you should go with a ported box to house the 12s, assuming you have the room!

That is the other advantage to sealed enclosures because they usually do not require as much space as the same subwoofer would require in a ported enclosure.

Another plus to most sealed enclosures is that they have a gradual rolloff on the low frequency curve versus ported enclosures that usually flatline below the port tuning frequency.

 

[GAM3OVR 5,000+ posts]

kicker CVX?

Give em ported, or nothing at all

 

[dman4486 5,000+ posts]

Another plus to most sealed enclosures is that they have a gradual rolloff on the low frequency curve versus ported enclosures that usually flatline below the port tuning frequency.

Yes, but for a driver designed for both enclosures, the sealed roll off will begin at a very high frequency; where a vented enclosure can be tuned for extremely low roll off

 

[gunz4me 10+ year member]

Yes, but for a driver designed for both enclosures, the sealed roll off will begin at a very high frequency; where a vented enclosure can be tuned for extremely low roll off

True... I have seen some enclosures for 10" subs that border on 3.5 cubic feet (net) with the port tuned @ 23 Hz. They will play down to 20 Hz with no problems

 

[dman4486 5,000+ posts]

True... I have seen some enclosures for 10" subs that border on 3.5 cubic feet (net) with the port tuned @ 23 Hz. They will play down to 20 Hz with no problems

sigcheck

 

[JimJ 5,000+ posts]

Yes, but for a driver designed for both enclosures, the sealed roll off will begin at a very high frequency; where a vented enclosure can be tuned for extremely low roll off

That issue can be alleviated somewhat by going with a very large enclosure, lowering the Qtc //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Onebadsrt 10+ year member]

wow, i dont know half of what yall are talkin about lol, but ill let them read this thread.

 

[nauc 10+ year member]

one of the things that = sq is having a flat response, meaning every frequency is reproduce at the same volume. thats why ported are usually inferior to sealed when it comes to sq cause they usually have a peak in the frequency response which is why theyre usually louder overall

heres the in car estimated frequency response for JL Audios 12w6v2 in sealed (yellow) and ported (red) in recommended size and tuning boxes

 

[mcsoul 10+ year member]

Ported 5 cubes net, tuned at 30Hz, 72sq^in of port area (6"x12" x 35.75"deep L-port)

and your set.

The ported guy is right, in the entire 25-40hz range you should see at least a 4-5db increase.

The box size is your major consideration. If you can fit ported, go for it.

 

[dman4486 5,000+ posts]

one of the things that = sq is having a flat response, meaning every frequency is reproduce at the same volume. thats why ported are usually inferior to sealed when it comes to sq cause they usually have a peak in the frequency response which is why theyre usually louder overall
heres the in car estimated frequency response for JL Audios 12w6v2 in sealed (yellow) and ported (red) in recommended size and tuning boxes

what program?

edited......me = stupid for not reading scales:crap:

and also, look at the response in the most common musical range. the lines are very similar except the ported is louder

 

[nauc 10+ year member]

what program?


edited......me = stupid for not reading scales:crap:

BBP http://www.ht-audio.com/pages/Products.html

 

[dman4486 5,000+ posts]

and for what car is that????//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

there are too many variables for that to be relevant in this thread

 

[nauc 10+ year member]

and for what car is that????//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

its just a default car, you cant pick and choose. it basically adds like 12dbs per octave starting at around 50hz

 

[photocrazy8 10+ year member]

lets see...

first off mock up programs have no use due to the fact of cabin gain, imp rise etc

second ported vs sealed is not really a debate on which is "better" each has an application where there are advantages and disadvantages...

third, PR>all

 

[nauc 10+ year member]

"there are too many variables for that to be relevant in this thread"

its just an example of what typically happens between sealed vs ported. sometimes seeing graphs helps a person to see what goes on.