Bandpass

[audioholic 5,000+ posts]

So much for not over complicating this, eh?

Imma, you made your point, you know how t-lines work. Unfortunately, as Ive already stated, unless designed and built as such, it will not be tuned not will it exhibit any useable features displayed by a t-line. You are seeing way too much in a simple drawing.

BTW, a cave with sufficient cross area would, again, exhibit no restriction on air flow and thus exhibit no tuning beyond simple wave interaction results.

You can care, or chose not to care, about what Ive built. If you want to ignore direct experience and reply on your theories, be my guest. Im simply saying, ive done it, it does not need nor will it likely exhibit t-line traits unless designed as such. When a speaker moves, it excites the air molecules and they will resonate. Does this make every setup a t-line? No.

 

[Immacomputer 10+ year member]

I dont think i could make it any longer than 4 foot deep, and 38"wide.

Well then you would probably not notice too much of anything as about the only thing you would boost would be above like 70hz.

 

[ThatChevyGuy 5,000+ posts]

Ok so lets say i make the chambers 1.4 cubes a peice, 2.8 for a side ( yay you can add). Whats the rule with the subs facing each other? closer together? farther apart? which is best for loud deep bass?

 

[Immacomputer 10+ year member]

So much for not over complicating this, eh?
Imma, you made your point, you know how t-lines work. Unfortunately, as Ive already stated, unless designed and built as such, it will not be tuned not will it exhibit any useable features displayed by a t-line. You are seeing way too much in a simple drawing.

BTW, a cave with sufficient cross area would, again, exhibit no restriction on air flow and thus exhibit no tuning beyond simple wave interaction results.

When I say "tuning" I'm not speaking from a helmholtz resonator perspective. It's not about creating a tuning point but a high pressure area and a high velocity area and that has nothing to do with airflow.

 

[BrianChia 10+ year member]

It behaves as a front loaded horn with rear chamber and a sealed 4th order bandpass design as well... there are no definite lines between enclosure alignments. It is a continuum not a hierarchy. Ported boxes act as rear loaded horns and transmission lines too. Make the port big and long and the lines begin to blur.

But this design would most likely exhibit characteristics most similar to a basic sealed box not a purpose built 1/4 wave design.

 

[audioholic 5,000+ posts]

When I say "tuning" I'm not speaking from a helmholtz resonator perspective. It's not about creating a tuning point but a high pressure area and a high velocity area and that has nothing to do with airflow.

If 'velocity' has nothing to do with airflow, what exactly are you describing the 'velocity' of? (airflow my friend //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif )
This is all very interesting, but I have a date. Later all, have a good evening.

 

[ThatChevyGuy 5,000+ posts]

Where's 80 at?

 

[audioholic 5,000+ posts]

Uh... its not a bandpass. lol?

 

[iDesignBoxes 10+ year member]

hk

 

[Immacomputer 10+ year member]

If 'velocity' has nothing to do with airflow, what exactly are you describing the 'velocity' of? (airflow my friend //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif )
This is all very interesting, but I have a date. Later all, have a good evening.

What I meant was that accounting for ease of airflow has nothing to do with deciding if something could become a transmission line. You need one area of pressure and one area for velocity. The excitation of the air particles increase from the pressure side to the velocity side where there is noticeable airflow. The cross sectional area doesn't matter as far as getting a line frequency; it just means you need something to create an even higher pressure to excite the air.

 

[ThatChevyGuy 5,000+ posts]

Oh well im gonna build it anyway and fire it into my cabin.

 

[audioholic 5,000+ posts]

What I meant was that accounting for ease of airflow has nothing to do with deciding if something could become a transmission line. You need one area of pressure and one area for velocity. The excitation of the air particles increase from the pressure side to the velocity side where there is noticeable airflow. The cross sectional area doesn't matter as far as getting a line frequency; it just means you need something to create an even higher pressure to excite the air.

You cant get pressurization without restricting airflow. If you know how, Im all ears. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif