bandpass or ported?

[RollinRemz05 10+ year member]

Is there a difference?

Click to read more...

 

[bumpn99blaze]

yes

 

[yne721 10+ year member]

yes

care to enlighten him?

 

[yne721 10+ year member]

Now we will start with :

PORTED enclosures (Bass Reflex) : A PORTED enclosure will generally have a better low frequency extension for a given response shape,but would require a larger enclosure. If you made the enclosure as small as the sealed enclosure, but ported it to gain the low frequency response, the output would deviate from the desired flat response.

Ported enclosures are slightly more difficult to design than a sealed enclosure. When using a sealed enclosure, it is difficult to be so far off as to risk damaging the woofers. In any type of enclosure, the woofer relies on the enclosure for damping. If there is insufficient damping, the woofer's cone will move significantly more than it should. The ported box will provide virtually no damping below the port frequency, all of the control will be provided by the woofer's suspension. Below the tuning (port) frequency, it is possible to cause damage to the woofer well before power levels approach the maximum power ratings of the woofer.

common tunning frequencies :

Sound Quality : 20 up to 28 Hz.

Sound Quality Loudness : 30 up to 35 Hz

Sound Pressure LeveL SPL : 40 up to 80 Hz (test tones are played rather than normal music, to avoid Low frequencies, which damages the speaker).

Its commonly used for competition propose. and not everyday driving.(unless you like listening to test tones for everyday driving).

BandPass enclosures (Single Reflex): Bandpass enclosure can sound good and give you a flat response,but most of the bandpass enclosures(in the market), are not designed for a flat response, this means that they are built to produce a large peak at some frequency from 50 to 60 Hz, these enclosures will work well with Rap, but generally they dont sound good with other types of music.

if u use a banpass enclosure. it should be designed specificaly for your speaker.

P.S : its not always recommended.

hope that this info will help many to understand the different types of enclosures.and which type will perform better for their propose.

-zAK

that's the best I can do for you. i think next time you'd be better off asking this in the enclosures forum though

 

[MazdaSpeed99]

To simplify this.... Bandpass hides distortion, and ported does not. Bandpass really are not good enclosures to have.

 

[JimJ 5,000+ posts]

Bandpass really are not good enclosures to have.

Depends on the driver's EBP...some drivers are well suited to bandpass, and although you're right, if the enclosure is built properly the driver shouldn't be reaching Xmech anyway //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

4th-order bandpasses can have excellent SQ in their passband, but it's a tougher to make it work than a standard BR.

 

[helotaxi 5,000+ posts]

You can't make a broad categorization that bandpass enclosures are no good. Bad BP enclosures are no good, but the same can be said for ported and sealed. I would say at least 99% of the people on this forum have never heard a good bandpass. That doesn't mean that they aren't out there. When done right, a bandpass can play loud and accurate within its passband. Doing it right though is much more dificult that with any other box type. Mess it up a bit and best case it sounds bad, worse case it can damage the sub.

 

[adio 5,000+ posts]

whats a bandpasses frequency range???

 

[ravendarat 10+ year member]

whats a bandpasses frequency range???

Thats completly dependent on how the box is built. Its like asking what frequency a ported box is tuned to, it depends on how its built

 

[azbass 5,000+ posts]

You can't make a broad categorization that bandpass enclosures are no good. Bad BP enclosures are no good, but the same can be said for ported and sealed. I would say at least 99% of the people on this forum have never heard a good bandpass. That doesn't mean that they aren't out there. When done right, a bandpass can play loud and accurate within its passband. Doing it right though is much more dificult that with any other box type. Mess it up a bit and best case it sounds bad, worse case it can damage the sub.

them same 99% probably have a wrong sized and tuned ported box anyway. //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[adio 5,000+ posts]

i think it would be pretty fresh to have somethin kick aass/loud as hell and flat between 25 - 50Hz and then have a sharp drop

 

[bri487 5,000+ posts]

prefab bandpass ftw.

 

[80INCHES 5,000+ posts]

if u want to hear a bandpass that hit the lows well and get seriously loud at the same time...u need to hear my car

u can ask

neverenuffbass(i hope i wasnt too loud in your drive way)

slammed(he only heard 1 12)

melaza(he said thats too much bass for him..lol)

carchrism5(was in my car while i was giving his friends hairtricks)

trex160

i think btnhfan heard it but only when i was in the bass race lanes

i'm sure theres other folks i 4got

80

 

[bigbassman Premium Member]

if u want to hear a bandpass that hit the lows well and get seriously loud at the same time...u need to hear my caru can ask

neverenuffbass(i hope i wasnt too loud in your drive way)

slammed(he only heard 1 12)

melaza(he said thats too much bass for him..lol)

carchrism5(was in my car while i was giving his friends hairtricks)

trex160

i think btnhfan heard it but only when i was in the bass race lanes

i'm sure theres other folks i 4got

80

what kinda numbers you doin nowadays?

Loyd L.

 

[helotaxi 5,000+ posts]

Thats completly dependent on how the box is built. Its like asking what frequency a ported box is tuned to, it depends on how its built

That the particular sub is properly matched to the box is the MOST important thing. Tuning and passband is dictated by the sub.