How does this graph look?

[CJL 10+ year member]

The orange line is a 6th order bandpass and the green line is a regular ported box. Would the BP get louder than the ported?

Click to read more...

 

[qtipextra 5,000+ posts]

Only at those freqs. Ontherwise, it has a very quick dropoff, like most bandpass boxes do.

 

[negativezeroz 5,000+ posts]

Can't see the picture very well but like qtip said only at those freqs. The ported enclosure has a flatter response where the BP has nothing. But that is most likely mid-bass anyways.

What sub(s) are you gonna run?

 

[CJL 10+ year member]

Yeah where it drops off in in the 75+hz so im not to worried about that but does 6th order bandpasses increase power handling or is that a 4th order bandpass

 

[helotaxi 5,000+ posts]

Maybe. With one watt of input, yes. It's quite likely that the bandpass will have lower mechanical power handling and with more power you can get the ported ox louder. When a sub is hitting its mechanical limits in a ported or sealed box, you can hear it. A bandpass will mask the sounds of the sub in distress and it will beat itself to death before you know it.

 

[CJL 10+ year member]

So 600wrms subs in a BP cant handle 600wrms?

 

[helotaxi 5,000+ posts]

So 600wrms subs in a BP cant handle 600wrms?

Depends. I've seen plenty of subs that reach their mechanical limits well before their thermal limit. Depending on the tuning of the box and the singnal fed to the sub, you can easily overstroke it with very little power. A lot depends on the actual build of the sub as well. Usually unless you are playing below tuning, the cone moves very little in a ported or 6th order enclosure. The motor of the sub is mostly just presurizing the air in the enclosure and the inertia of the air going in and out of the port adds additional damping to the cone. Send too much power to the sub and the forces exerted by the enclosure and the motor can literally tear the sub apart. This is with the cone barely moving. A 6th order enclosure exerts even more pressure on the cone...

 

[CJL 10+ year member]

both are shit designs
I'm going to work now...

Why it that //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[helotaxi 5,000+ posts]

Why it that //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Don't mind him, he pops in to threads, replys with something totally non constructive and then departs.

 

[CJL 10+ year member]

I think i gonna try 1 of those boxes as soon as i figure out the formula,the graph looks like it should get hella loud for rap music //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[qtipextra 5,000+ posts]

personally, i'd go with the ported. It's be better all the way around.

 

[PowerNaudio 10+ year member]

if you can post a larger image to where i can see the freqs and the F3 i would be able to give you a better answer. but by looking at the picture most defenetly the bandpass box is louder, i cant see the freq values do i cant judge on wich one is better overall.

 

[joetama 5,000+ posts]

I would usually gernally say if you have a lower quality sub (NOT SQ and not that powerful), and don't really care about SQ and just SL then go with the Band-Pass (they just seem lower performance SQ wise to me).

The responce is pretty jagged and you might want to try to smooth it out a little more to get an even responce on the output also.

And, nice quote there in your SIG LOL!!!!

 

[helotaxi 5,000+ posts]

apparently horrible peaks in the frequency response = loud now?
oh well, whatever floats your boat....

horrible peaks at one frequency vs a fairly flat response...

hmm

Ever seen the response curve of an SPL enclosure? Just one huge peak. Guess what, horrible peaks do equal loud. May sound like utter trash, but it IS loud. The two are different things.

 

[PowerNaudio 10+ year member]

the question was wich one will get louder. nothing eals and acording to the peaks on the bandpass enclosure, is that the bandpass is showing that will go louder. plain and simple. if he wants an enclosure that get loud on music and sounds good.i would bring down the peak of the ported enclosure to about -6 db and go with that. reason for bringing that peak to -6db is because cabin gain will most likely bring that low end up in the +db area.