how's this for cabinet design?

[legendaryfrog]

do you have any suggestions?

he drawing is from Paint so its pretty bad.

 

[leadbelly]

What is it? It appears to use some kind of horn/wave loading, but the cross section jumps all over the place in the throat.

 

[legendaryfrog]

IGNORE THE FIRST PICTURE

this is "edited"

 

[leadbelly]

My question remains. 🙂

 

[freddi]

for that level of cutting complexity you might look a an accomplished designer's work - RCA-Fan (Bill Woods of Traynor and AH!) 20cm driver horn - no hard cuts - I think he tries to get a "sound" where his speakers will play good cello and bowed bass

Finished speaker
http://gallery.audioasylum.com/cgi/gi.mpl?u=21168&f=OakSpeaker_004.jpg_

http://gallery.audioasylum.com/cgi/gi.mpl?u=21168&f=PLAN.gif

http://gallery.audioasylum.com/cgi/gi.mpl?u=21168&f=BRACE.gif

http://gallery.audioasylum.com/cgi/gi.mpl?u=21168&f=PLANS-2.gif

 

[lndm]

Yes, as has been brought up, the pipe goes big, small, big, small, big. Its hard to look past that fact when this is so important.

I'd also like to know, what is it?

 

[legendaryfrog]

well.....its a speaker enclosure......

 

[leadbelly]

well.....its a speaker enclosure......

You might want to read up a bit on the very basics of speaker design. Speaker enclosures aren't designed by just roughly sketching dimensionless shapes for any driver. Maybe if you could tell us what kind of speaker you were trying to design (back loaded horn, transmission line, etc.) we could point you in the right direction.

 

[Richard Ellis]

Enclosures...

I think your confusing two different types of enclosures
The panel inside your tower is loosely the type of back horned design...these horns are set up to provide an increasing volume as the "start" of the horn is small & increases in volume & as the sound wave moves further away it increases in volume until it exits the enclosure in a relatively large "mouth".
The port you sketched is of a very different type called the " Bass reflex" design. That type of design takes into account alot of specifications of the particular driver being used.
With these specifications you will have a specific box volume, port size, Port length, and frequency "tuned" to the box.
___________________________________Rick..........

 

[lndm]

Perhaps the intention was a mass loaded transmission line?

legendaryfrog, did you see this design somewhere or did you come up with it? There are various enclosure types that are vastly different in function but which look the same to the untrained eye.

Perhaps you might just list what you would like to have in the bass region (loud, accurate, whatever), and we could suggest ways to get it. From your drawing I'm guessing that you're interested in a conventional transmission line.

 

[legendaryfrog]

just ignore this post. ive made a cyburg-needle already.

 

[lndm]

Here's a link to a mass loaded transmission line project.
http://www.quarter-wave.com/Project05/ML_TL_Enclosure.pdf
http://www.quarter-wave.com/Project05/Project05.html

You'll notice that it doesn't fold inside itself but it is the same, just that this design needs a shorter line. It uses a port at the end and resembles a bass reflex enclosure.

Pipes are good
http://www.diyaudio.com/forums/showthread.php?threadid=47403
http://www.diyaudio.com/forums/showthread.php?threadid=73194
I can see why you want to take this further.

 

[bjorno]

well.....its a speaker enclosure......

Yes it is and DIY made many times with great success.

B

 

[Cal Weldon]

Nice work Bjorno.

I think since LF has started with a simple drawing and has moved on and made another type of cabinet we may as well close this thread. If there are objections, email me.