Ok i came across this fantabulous project called the V3 utilizing the P17WJ's and a D25AG35's. I am eger to start bulding this project but the problems i have when doing up my own drawings is the internal height and volume measurments.
As im Australian and us aussies use the metric system obviously i have to convert the measurments. This doesnt seem to be a problem though, but because an internal height of the divider is not specified to seperate the compartments i have no idea of what the internal height is suposed to be.
I dont know if this question makes sense because as i read through it, it doesnt make much sense to me. Hopefully you get my drift. All i want to know is basically the internal dimesnsions of the compartment holding the drivers.
Thanks
Joel
As im Australian and us aussies use the metric system obviously i have to convert the measurments. This doesnt seem to be a problem though, but because an internal height of the divider is not specified to seperate the compartments i have no idea of what the internal height is suposed to be.
I dont know if this question makes sense because as i read through it, it doesnt make much sense to me. Hopefully you get my drift. All i want to know is basically the internal dimesnsions of the compartment holding the drivers.
Thanks
Joel
Your question made sense as soon as I read the article.
LOL, how long ago did Australia go Metric? About ten years ago I was talking to a woman just over from England who said that everyone over there still talked about inches and yards. The Canadians just switched a few years ago. Oh well.
From the article: "The cabinets are constructed of laminated panels - a 3/4" layer of pre-veneered MDF bonded to a 1/2" layer of particle board, ....The upper compartment holds the drivers, has a volume of 28.32 liters and is tuned to 45.5 Hz (via a 3" diameter port, 6" in length)...." [italics mine]
So the walls are 1.25" thick. Therefore, the internal dimensions are 45" X 10.5" X 6.75". The port has a volume of 42 cu inches which we might as well add to the volume of the speaker compartement.
A square foot, (28.3 liters), equals 1728 cu inches. Add the 42 cu inches for the port, and we have a speaker compartemtnt with a volume of 1770 cu inches.
It is the length we want to cut down, so we divide 1770 cubic inches first by 10.5 inches, then again by 6.75 inches, to get a length of 25 inches. Your speaker compartement should be 25 inches tall. Insert your divider accordingly.
Let us know how this comes out! 🙂 🙂
LOL, how long ago did Australia go Metric? About ten years ago I was talking to a woman just over from England who said that everyone over there still talked about inches and yards. The Canadians just switched a few years ago. Oh well.
From the article: "The cabinets are constructed of laminated panels - a 3/4" layer of pre-veneered MDF bonded to a 1/2" layer of particle board, ....The upper compartment holds the drivers, has a volume of 28.32 liters and is tuned to 45.5 Hz (via a 3" diameter port, 6" in length)...." [italics mine]
So the walls are 1.25" thick. Therefore, the internal dimensions are 45" X 10.5" X 6.75". The port has a volume of 42 cu inches which we might as well add to the volume of the speaker compartement.
A square foot, (28.3 liters), equals 1728 cu inches. Add the 42 cu inches for the port, and we have a speaker compartemtnt with a volume of 1770 cu inches.
It is the length we want to cut down, so we divide 1770 cubic inches first by 10.5 inches, then again by 6.75 inches, to get a length of 25 inches. Your speaker compartement should be 25 inches tall. Insert your divider accordingly.
Let us know how this comes out! 🙂 🙂
kelticwizard said:
It was a bit longer ago than that, but everything is still a mix of units. Buildings are still framed with 2 x 4s (which are actually 1.5 x 3") and the kids in school have trouble telling you what an inch is.
dave
Thank you very much for that!
I will definatley keep everyone informed and also try to get a few snap shots as well 🙂
Still deciding what finish to have cause i dont like my chances of getting some good pre-verneered MDF.
I will definatley keep everyone informed and also try to get a few snap shots as well 🙂
Still deciding what finish to have cause i dont like my chances of getting some good pre-verneered MDF.
http://www1.jaycar.com.au/productVi...xxx&pageNumber=&priceMin=&priceMax=&SUBCATID=
someone stole someones idea... sorta.. 🙂 lol
someone stole someones idea... sorta.. 🙂 lol
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Im sure there are lots of different types of speakers using these drivers in this configuration... No copying here... Only enchancing or modifying 🙂
Scribble:
Just to add on to our Metric conversion. The thought occurred to me that perhaps you don't want to make the walls of the enclosure 1.25" thick. Perhaps you want to make it out of MDF, which I understand comes in thicknesses of 18mm.
So: I shall give you both the outside and the inside dimensions of the enclosure in Metric, using 18 mm MDF-the light tan stuff which frequently gets called "particle board" over here.
Actually, I suspect Scribble can handle this part by himself. I just included these dimensions for other people reading this thread who would like to build this project.
Inside Dimensions: In mm. 1125 X 263 X 169. The divider is inserted so that the speaker compartment is 625 mm high.
Ouside Dimensions: In mm. 1161 X 299 X 205.
The Metric equivalent of a pipe 3" diameter by 6" long is 75 mm X 150 mm. If that size is not available, just start a thread telling the board which diameter pipes are available, and someone will work out the length for you. I have no idea what diameters PVC pipe are sold in Metric contries-whether it is equivalent to the inches they sell over here or not.
For non-Metric people, which is just about every non-scientist or non-engineer in the USA, if you want to build this speaker with 3/4" MDF, then here are the inside dimensions and outside dimensions.
Inside Dimensions: 45" X 10.5" X 6.75". The divider is inserted so that the speaker compartment is 25" high.
Outside Dimensions: 46.5" X 12" X 8.25".
And of course, the aforementioned 3" diameter by 6" long PVC pipe.
It looks like a snazzy project, I suspect a few people will be building them. Good luck, everyone! 🙂
Just to add on to our Metric conversion. The thought occurred to me that perhaps you don't want to make the walls of the enclosure 1.25" thick. Perhaps you want to make it out of MDF, which I understand comes in thicknesses of 18mm.
So: I shall give you both the outside and the inside dimensions of the enclosure in Metric, using 18 mm MDF-the light tan stuff which frequently gets called "particle board" over here.
Actually, I suspect Scribble can handle this part by himself. I just included these dimensions for other people reading this thread who would like to build this project.
Inside Dimensions: In mm. 1125 X 263 X 169. The divider is inserted so that the speaker compartment is 625 mm high.
Ouside Dimensions: In mm. 1161 X 299 X 205.
The Metric equivalent of a pipe 3" diameter by 6" long is 75 mm X 150 mm. If that size is not available, just start a thread telling the board which diameter pipes are available, and someone will work out the length for you. I have no idea what diameters PVC pipe are sold in Metric contries-whether it is equivalent to the inches they sell over here or not.
For non-Metric people, which is just about every non-scientist or non-engineer in the USA, if you want to build this speaker with 3/4" MDF, then here are the inside dimensions and outside dimensions.
Inside Dimensions: 45" X 10.5" X 6.75". The divider is inserted so that the speaker compartment is 25" high.
Outside Dimensions: 46.5" X 12" X 8.25".
And of course, the aforementioned 3" diameter by 6" long PVC pipe.
It looks like a snazzy project, I suspect a few people will be building them. Good luck, everyone! 🙂
Thanks for that kelticwizard
Yeah after getting the height i probably could do the rest by my self i suspect 🙂
But that is still very helpful info i can definatly use throught out the project.
I hope other people do undertake this project as it does look very interesting and i could share some experiances and reviews along the way.
Thanks heaps!
Yeah after getting the height i probably could do the rest by my self i suspect 🙂
But that is still very helpful info i can definatly use throught out the project.
I hope other people do undertake this project as it does look very interesting and i could share some experiances and reviews along the way.
Thanks heaps!
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