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Thread: I need some help with building a 18 sub

  1. #1
    Senior Member dino's Avatar
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    I need some help with building a 18 sub

    Hello . I dont have the room for a huge cabinet . what is the smallest size cab I can use for max bass and also what size port do I use. thanks dino

  2. #2
    Senior Member spkrman57's Avatar
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    Need more info here....

    How low must it go?

    How loud must it be at the lowest notes?

    How large is your roomsize?

    What amp are you driving it with?

    What is the highest frequency the sub must operate up to?

    These answers will help us answer your question!

    Regards, Ron
    JBL Pro for home use!

  3. #3
    Moderator hjames's Avatar
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    Quote Originally Posted by dino View Post
    Hello . I dont have the room for a huge cabinet . what is the smallest size cab I can use for max bass and also what size port do I use. thanks dino
    You gonna put another 18 in that room?
    Hoo-boy!
    2ch: WiiM Pro; Topping E30 II DAC; Oppo, Acurus RL-11, Acurus A200, JBL Dynamics Project - Offline: L212-TwinStack, VonSchweikert VR-4
    7: TIVO, Oppo BDP103D, B&K, 2pr UREI 809A, TF600, JBL B460

  4. #4
    Senior Member dino's Avatar
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    Quote Originally Posted by spkrman57 View Post
    How low must it go?

    How loud must it be at the lowest notes?

    How large is your roomsize?

    What amp are you driving it with?

    What is the highest frequency the sub must operate up to?

    These answers will help us answer your question!

    Regards, Ron
    until I feel it hit me in my chest befor I hear it. room size is 12 by 12
    parasound hca 3500 but I might buy a crest ca-9 for the sub
    no higher than 300 hz

  5. #5
    Administrator Robh3606's Avatar
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    Hello Dino

    Download WinIsd and figure it out.

    Rob
    "I could be arguing in my spare time"

  6. #6
    Senior Member sourceoneaudio's Avatar
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    What driver? Then go from there.

    Also 300hz is to high, major hump up to that frequency with those other 18" drivers. I would say the highest I would cross it would be 70hz. I would rather have a hump up to 70hz than all the way up to 300hz. might sound like a giant boom box.
    Jeff-S1A

  7. #7
    Senior Member dino's Avatar
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    Quote Originally Posted by Robh3606 View Post
    Hello Dino

    Download WinIsd and figure it out.

    Rob
    thanks I did figure it out inside height 32 inch
    w-26.1
    d-22.6 = 10 cubic ft
    6 ports 4 inch in diam 15.2 inch long
    this is tune to 30hz

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