4th order bandpass

[ice]

how duz a 4th orderbandpass box work an or they good 4 spl ?:confused:

[TazDevil]

im sure others can explain how it "works" better than i.. but i can attest to it being a decent start for spl. i had one RF P3 15" off of like 300rms in a 4th order peaking at 39 hrtz, and was hitting mid 30s..

[kyleracer25]

how duz a 4th orderbandpass box work an or they good 4 spl ?:confused:

well bandpass boxs are good for playing like a range of notes and some notes the sealed side is better and same as for the ported side.....but i mean if ur trying to do numbers then they r good as long as u build and tune it right....but if u really wanna know more about 4th orders talk to Gmonk or MP3....they can help ya out....

[80INCHES]

4th order is a sealed rear chamber playing into a ported chamber
port is the tuning
im too lazy to type out wats wat ...but thats it in a nutshell
r they good for spl..if done right hell yea
most of the really loud folks overseas use 4th orders..and there in the 170's
80

[fredz89]

i got a 4th order in the trunk of my civic holding a btl 18, its loud as f*** but mines tuned too low so im not hitting as loud as i should be hitting but if i were to tune it a little higher i know id be in the mid 140s.
before this i had my 18 ported and i can def hear and feel the difference it catches all the lows so nicely and clearly

[ice]

duz any one have any photo's of some 4th order's to c if I can do 1 in the back of a dodge neon with 12 2xl powerbass 10's? :confused:

[BIG RED]

look up in memebers for for king of bass tommy, or pipo, or imamp3pimp or even noiseycricket

[PEDRO MODEAN]

http://i120.photobucket.com/albums/o175/pedromodean/KOB%20show/DSCF9125.jpg
http://i120.photobucket.com/albums/o175/pedromodean/11-07-09%20MTW%20show/d19b808b.jpg
http://i120.photobucket.com/albums/o175/pedromodean/11-07-09%20MTW%20show/a12e9967.jpg

[pimpedout97x]

tommys is 4th??

[PEDRO MODEAN]

tommys is 4th??

ive heard it was. am i wrong? sealed firing into that tunnel. would that constitute a port of some kind?

[pimpedout97x]

some say it does, but ive always considered it sealed.

[80INCHES]

look up in memebers for for king of bass tommy, or pipo, or imamp3pimp or even noiseycricket

wat about me?
lol

80

[Baracka Flocka Flame]

here are some vids of crickets car. hes running a 4th order.

http://www.youtube.com/watch?v=s9SCFlzbn4Y

http://www.youtube.com/watch?v=_VnxdclQSPk

[kyleracer25]

tommys is not a 4th order its called a diamond

[CBFryman]

ive heard it was. am i wrong? sealed firing into that tunnel. would that constitute a port of some kind?

No.

You need a chamber and a port to have helmholtz resonance which is the property of air that allows ported boxes of any kind to work.

[PEDRO MODEAN]

No.

You need a chamber and a port to have helmholtz resonance which is the property of air that allows ported boxes of any kind to work.

ok thanks for the clarification.

[NoiseyCricket]

dro wat up ! ANJ thanks for the props and biggin me up I appreciate you (no homo) and not a ref to the longest yard lmao

[CBFryman]

ok thanks for the clarification.

There may be some sort of quarter wave resonance but I dont know for sure because the energy is delocalized (Subs run the length of the line). Still, his diamond would only be useful down to ~80Hz due to its short length. More or less it is just an easy way to get a lot of sealed woofers in a small space. The frequencies it is reproducing are sufficiently low and the size is sufficiently small to where from an initial look I wouldn't guess that the design is giving any significant gains.


Tommy did what a physicist would do if they wanted to ensure they got loud. Isolate the back wave from the front wave so you dont have to worry about any cancelations anywhere. Then you just have to give it a lot of power and use efficient drivers.

[iamamp3pimp]

indeed it is the rear wave that is the cause of cancellation in most enviornments.

but

without it, most of us would be super lost.

[CBFryman]

Very true, but most of us dont have 24 subs and a dumpster sized enclosure lol.

[iamamp3pimp]

lmfao

[iamamp3pimp]

duz any one have any photo's of some 4th order's to c if I can do 1 in the back of a dodge neon with 12 2xl powerbass 10's? :confused:

no.