3 inch Port or 4 inch Port.

Discussion in 'Archived Threads 2001-2004' started by Tyler, Jun 19, 2001.

  1. Tyler

    Tyler Stunt Coordinator

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    I'm doing reaearch for a vented titanic 10" & when i put down a 4 inch port in the program that i use it says it will have to be 20 inches long but when i put down a 3 inch port it says i only have to make it 11 inches long.
    If i were to use a 4"wide port i would have to make the port bend into a 90d angle cause the port is so long.
    But if i use a 3" wide port i dont have to do any angels on the port i can just keep it strait.
    What size would be better.
    & both of the tunings are at the same tune of 25Hz
     
  2. Neil Joseph

    Neil Joseph Lead Actor

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  3. Brett Miles

    Brett Miles Stunt Coordinator

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    Also flared or straight?
     
  4. Tyler

    Tyler Stunt Coordinator

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    Both ends are flared
     
  5. John_Pech

    John_Pech Extra

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    As a general rule of thumb, the port diameter should be no less than 1/3 the diameter of the driver (sub).
    A 4" dia. port would be better than the 3", as the airspeed though the port would be lower, lowering the possibility for port noise. (chuffing)
    Hop this helps,
    JJP
    ------------------
    I got two turntables and a microphone
     
  6. John_Pech

    John_Pech Extra

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    Also, if you decide to use the 4" port and have to "bend" the port in order for it to fit into the enclosure, Make sure to use the largest radius elbow you can find, (not an extreme right angle elbow) to prevent turbulence in the port.
    Be sure to keep the opening of the port, inside the enclosure, at least 3" away from adjacent walls.
    Best regards,
    JJP
    ------------------
    I got two turntables and a microphone
     

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