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I need the cubic ft. for a pyramid PW677X subwoofer to make a ported box.the port length and diameter would help also.

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Posted on Jan 02, 2017

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SOURCE: I just bought a pair of pyramid pw1576s subs what

well if u bulid a box u need to leave air holes in it b/c if u dont they will blow

Posted on Sep 22, 2009

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1 Answer

What is the cubic feet needed to build box for audioban 12


You can use this speaker in either a ported or sealed box. A sealed box would be smaller, (sealed box volume: 0.5 to 1.25 cubic feet) the larger the box the more base you will get. With a sealed box your amp has to work double hard as it would in a ported box ( 1.3 to 3.2 cubic feet) You will get close to double the volume in a ported box. Tuning a ported box with the size and length of the port will determine the hertz the speaker will play at.

Sep 15, 2014 | AudioBahn AW1206T Car Subwoofer

1 Answer

What is the volume required for a ported box?


If you take the height times the width times depth divided by 1728 will give you box volumes.
you can get a speaker book at radio shack that gives you charts as to a box with a certain amount of cubic volume it will tell you for a 2" port or a 3" port to cut to a certain length for a certain frequency.
the book is called building speaker systems
speakers for your listening pleasure.
the number of the book radio shacks number is
62-1087a.
H x W x D=
answer / 1728= cubic volume.

Jun 21, 2010 | Pyle PL1590BL Car Subwoofer

1 Answer

I need to know the enclosure specs for the PSW615 alphasonik subwoofer... need volume for vented enclosure


Hello chetdyal,

For a ported enclosure with room for a port, you're going to need a box with about 3.0 CuFt internal volume. Using 3/4" material and outside dimensions, this translates into a box 25"(w)X18"(h)X15"(d) giving you 3.03 CuFt allowing a little volume for the sub and port displacement. For a tuned frequency of 38Hz, you'll need a rectangular port 2"X6" and 4.6" in length. A round or cylindrical port for the same tuning frequency would be 4" in diameter and 4.9" in length. Increasing the port length will lower the tuned frequency.

There's excellent volume and port calculators on The12v.com web site. I'd recommend that you browse some of the "box-building" information before you begin your build. The DIY Subwoofer site also has some great resources.

Keep in mind that a ported enclosure will tend to produce the loudest bass notes very close to the tuned frequency. So tune it higher or lower according to the music you will be playing.

Hope this helps.

Jun 08, 2009 | Alphasonik PSW615 Car Subwoofer

2 Answers

Building a box, need to know best dimensions for box and port


Hello dirt_digger6,

The specific sub you are asking about would seem to be the TS-302F which is the only 12" 800W Pioneer I have located.

Directly from Pioneer's support knowledgebase:
TS-W302F = Ported: 2.5 Cu.Ft. F3 = 39HzPort: 4  x 6.5 tuned @ 37 Hz with 12 % port noise.

An enclosure 16X18X21, constructed from 3/4" MDF will yield 2.69 Cu.Ft., allowing .19 Cu.Ft. displacement for the sub and port.
There's an excellent "box calculator" located here on the12v.com web site. You can measure the space you have to put the box and fiddle with the dimensions to get close to your ideal volume. There are also calculators on the12v.com which will allow you to calculate a port length based on port diameter (or width/height), enclosure volume, and desired tuning frequency.

Hope this helps.

May 07, 2009 | Car Audio & Video

1 Answer

Need specs on a ported box for 1 12"stroker 124


I used to be a Cerwin Vega dealer. How much space do you have? Ideally you would want at least 4 cubic feet per sub. If you shoot me an E-mail @ dynami28@charter.net I will be willing to discuss exact plans for your application. I now run a local business designing custom enclosures and electronics for home, marine, and auto. As for your Stroker- A general box design is going to need to be ported with alot of volume (cubic feet) the bigger the better. The actual port diameter and length will be determined after I have some basics from you. I will give you a free design to start with if you Email me the specifics like how much room do you have? how much power? dual 4ohm coils? car, p/u truck, van/suv? The more info the better. If you want something more custom please specify and I will be happy to help.

Mar 23, 2009 | Cerwin Vega IT-15.0 Car Subwoofer

1 Answer

Size of boxes


Wow you are in luck, I used to be an Audiobahn dealer. Designing sub enclosures is my fulltime job. So here you go.-
If you are looking for sound that is very smooth, and has a very low end shaking everything setting off car alarms. You will need a PORTED BOX that is 3 CUBIC FEET FOR EACH SUB WOOFER. It actually calls for 2.7cu.ft but after you add speaker displacement and bracing it should be at least 3 cu.ft. The port can be either round or square made of plastic or 3/4" wood respectively. My port suggestions are dependent on how much space you have. The shortest round port might make some noise (too much pressure!). So think about that first. Anyway the short port is 3" diameter and 15.5" long. The longer port is 4" in diameter and 28.25" long. The rectangular wood port can also be either (port measurements are inside diamensions) 3" w x 3" w x 18.5" long (short port) or 2 w x 10.5 h x 48' long. The second longer wood port is recommended most but will take up a lot of space. The fact that you have to subtract the port volume from the box makes for space issues in cars. Also the second wood port sounds better and won't make much wind noise, but takes up .75 cu.ft worth of space. So in plain english your box will have to have an internal volume of 3.75cu.ft. An example of this could be made of 3/4" thick MDF, have 1" x 1" internal bracing and measure (box dimensions are external and assumes the use of 3/4" MDF) 12" h x 18" w x 30" deep. The port is an integral part of the box fitting inside. I'm sorry I can't provide any drawings to make things easier. Now this box size is one that I ran through a computer program I use. So it is not the same as the manufactures recommendations. I will list those as well.
The second box is an example using a round short port and also uses 3/4" MDF, 1 x 1" bracing, the 3" dia x 15.5" long port, and measures 12" x 18" x 24" externally.
If space is an issue try checking out the information below. -I got it from Audiobahn-
If for some reason it doesn't show up or you need assistance let me know. Good luck and enjoy your new setup-I'm sure you'll be happily disturbing the peace soon!
-Dynami
Model # AW1006T
Ported
Air Space (Cu. Ft.) 0.65
Port Size (Inches) 2 x 6.5
Port Vel. (%) 48.31
-3dB (Hz) 31.5
Tune Freq. (Hz) 40
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.01
Total Vol. (Cu. Ft.) 0.75
Ported
Air Space (Cu. Ft.) 1.4
Port Size (Inches) 3 x 6.75
Port Vel. (%) 24.19
-3dB (Hz) 30
Tune Freq. (Hz) 39
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.024
Total Vol. (Cu. Ft.) 1.5
Ported
Air Space (Cu. Ft.) 2.4
Port Size (Inches) 4 x 6.25
Port Vel. (%) 14.39
-3dB (Hz) 29
Tune Freq. (Hz) 39
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.04
Total Vol. (Cu. Ft.) 2.5
EBP 74 80 80

Sealed NR NR NR
Minimum (Cu. Ft.) 0.5
Maximum (Cu. Ft.) 1
SPL (dB) 80
All sealed boxes already include the displacment for the subwoofer. NR = (Not Recommended)

Mar 08, 2009 | AudioBahn AW1006T Car Subwoofer

1 Answer

Orion hcca


The owner's manual states the ported box should be:
  • 4.00 cu ft.
  • Port diameter = 4"
  • Port length = 14"
It doesn't mention round vs. rectangular port. For more details, you may want to contact Orion.

Mar 20, 2008 | Orion 15" Competition Subwoofer H2 15D4...

1 Answer

MA Audio MA1800XL


Optimum Vented Box: 4.5 Cu/Ft
Round Port Diameter: (3) 4"
Square Port Area: 37 Sq/In
Port Length: 17"
Optimum Sealed Box: 1.75 - 2.5 Cu/Ft these are your options as you can see if your short on space your sub will love a 1.75 to 2.5 sealed box but if you have THE right ported box you will get better bass with less power but at the end of the day that sub will Pump wish i had one good luck hope this helps you info from manufacture cheers bronson

Mar 06, 2008 | MA Audio 800XL Car Subwoofer

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