I'm planning to build a speaker system using PVC pipe. I used an online calculator to figure the area (in inches) of a circle per instructions. Do I take this sum and multiply by inches (Per calculated I.D.) to get the internal area?
Calculate area of a circle and its circumference. What is Circle?
Example.. Thinking 6" I.D. PVC pipe..
A 6" circle has an area of 28.27" per the calculator. (Using a 3" radius)
My goal is ~.2 sq. ft. of internal area. (345.6")
If I divide the area of the circle into the desired internal area, I come up with 12.22" in length.
Does this sound correct?
Thanks in Advance!
Calculate area of a circle and its circumference. What is Circle?
Example.. Thinking 6" I.D. PVC pipe..
A 6" circle has an area of 28.27" per the calculator. (Using a 3" radius)
My goal is ~.2 sq. ft. of internal area. (345.6")
If I divide the area of the circle into the desired internal area, I come up with 12.22" in length.
Does this sound correct?
Thanks in Advance!
Areas are measured in square inches.
You are confusing >>area<< (in square inches) , with >>volume<< (cubic inches).
What do you actually need?
What formula or calculation will it be used in?
If he wants to know the volume of the speaker box to allow modeling of his vented speaker, then he needs the internal volume of the box and MUST subtract the EXTERNAL volume of the port and subtract the wasted volume of the speaker driver and subtract the volume of all internal braces and panels.
A cubic Foot is 1728 cubic inches
so 2 cubic foot = 3456 inches
Area of 6" pipe is 28.27 square inches
So length for 2 cubic feet is 3456 / 28.27 = 122.25 inches
Think you need a bigger diameter tube!
so 2 cubic foot = 3456 inches
Area of 6" pipe is 28.27 square inches
So length for 2 cubic feet is 3456 / 28.27 = 122.25 inches
Think you need a bigger diameter tube!
Thanks, guys..
My goal is (.2) sq. ft. of (Volume?) or area inside of the 6" PVC. I'm the new guy on the block so be easy on me.. 😉
I'm working with a 3.5" driver and this is the required (Volume or Area) it needs.
My goal is (.2) sq. ft. of (Volume?) or area inside of the 6" PVC. I'm the new guy on the block so be easy on me.. 😉
I'm working with a 3.5" driver and this is the required (Volume or Area) it needs.
12.22 inches looks spot on to me, but round it up a bit to allow for the driver and port area etc.
HTH,
Brian
HTH,
Brian
Thanks, godfrey. Guess I'd better learn the correct terms to run with the big dogs..
I already built a tool box "Boom Box" with the drivers but I plan to change the shape and be more scientific about it. I have almost .2 ft. of volume in half of the tool box divided in two separate chambers (half of the bottom of the tool box) ported with a 2" length of 1" I.D. PVC. (Driver/Port in each side) I overlooked the volume of the driver and the port and I don't have any room to expand, hence, the PVC challenge..
I already built a tool box "Boom Box" with the drivers but I plan to change the shape and be more scientific about it. I have almost .2 ft. of volume in half of the tool box divided in two separate chambers (half of the bottom of the tool box) ported with a 2" length of 1" I.D. PVC. (Driver/Port in each side) I overlooked the volume of the driver and the port and I don't have any room to expand, hence, the PVC challenge..
Here ya go, Cal. It's not pretty but it works. Not quite finished with it yet but it's sweet..
I built it for a test fixture. I purchased a couple of sets of speakers (unheard) and got stung! I now have a way to test, even if the seller doesn't have a way to hook them up..
The switch in the center transfers the output of the amp to the speaker connections and disconnects the internal speakers. I can tell if a speaker is junk or not with a few watts.. 😉
To Add..
The box is separated in the center with a piece of 3/4" plywood.. (8x8x6 Approx.)
I built it for a test fixture. I purchased a couple of sets of speakers (unheard) and got stung! I now have a way to test, even if the seller doesn't have a way to hook them up..
The switch in the center transfers the output of the amp to the speaker connections and disconnects the internal speakers. I can tell if a speaker is junk or not with a few watts.. 😉
To Add..
The box is separated in the center with a piece of 3/4" plywood.. (8x8x6 Approx.)
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Thank You! Am I to assume that you included the volume of the speaker?
That's OK, Cal. I took the cheap and easy route. That tool box laid out in the shed for years! I cleaned it up and got the tape measure out. It was luck that the dimensions were about right..
Yup.. Nuthin' like "Jammin' Junk".. 😉
Gonna git to work on some "Tubular Tunes". Thanks Everyone!
Gonna git to work on some "Tubular Tunes". Thanks Everyone!
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