Audio & Video Tech General discussion of audio and video for the Ford Ranger.

port calculations

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Old Nov 23, 2008
  #1  
bpolly_2004's Avatar
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From: Huntsville mo
port calculations

my buddy is thinking of buying my 8 inch solo baric subs. he wants me to build him a ported box. he doesnt have enough room for the ports on the face of the box. so i thought of making one port for the 3 subs. the kicker specs for the dims are 2 x 9.5 x 21.25. how do i make one port for 3 woofers? basically what do i do to figure out the new port? do i add the numbers together or what?
 
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Old Nov 24, 2008
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bpolly_2004's Avatar
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From: Huntsville mo
anyone???
 
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Old Nov 24, 2008
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215ranger's Avatar
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From: oxford pa
its better for you to go sealed then port because ported requires more space
 
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Old Nov 24, 2008
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CBFranger's Avatar
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From: Tampa Bay Area
All three subs share a single chamber. The port calculations are the same. Use the entire net volume of the enclosure.
 
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Old Nov 25, 2008
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bpolly_2004's Avatar
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From: Huntsville mo
but i want to make one port. not one port for each sub. basically 3 subs 1 port.

he has the airspace just not enough room on the face of the box. and the way the box sets we cant put the port on the side of the box.
 
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Old Nov 26, 2008
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CBFranger's Avatar
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Then put it out the front or. 90 degree direction shift isn't going to affect the sound that much.

You'll need an ilistration or a pic for me to understand wtf you're talking about though. 3 subs, 1 port. all three subs share the same chamber and the port can go any which way.
 
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Old Nov 26, 2008
  #7  
rinconmanof90's Avatar
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From: Sanford, NC
I have 2 15s with only one big port. Ill get a pic of the box tomorrow. I have a 6 cubic ft box with a port that is 4"W, 16.5"D, and 18"L and its tuned to 35Hz.

Here is a box i found with 3 ED 8s and one port.
Name:  3subs1port.jpg
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Size:  19.2 KB
 
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Old Nov 27, 2008
  #8  
optikal illushun's Avatar
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From: Coal Region, MTC to be exact...heart of the coal region.
thats called a slot port, very useful for tight areas.
 
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