Closed Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 15 of 42

Reload Thread: Critique the Box

  1. #1
    acreature's Avatar
    acreature is offline Mach1smo



    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Critique the Box

    Overall Dimensions:
    (w)23-5/8" x (h)12" x (d)14-3/4"

    1 cu ft for Diamond Audio D310D4
    46-1/8" port length @ 2"x10.5"

    Should be tuned between 32-33hz


    Close? Or no cigar?







  2. #2
    Buck's Avatar
    Buck is offline always low Buck is a Supporting Member of the forum!



    Join Date
    May 2008
    Location
    Nashville
    Posts
    18,378
    Post Thanks / Like
    Mentioned
    253 Post(s)

    Re: Critique the Box

    Seems like a pretty long port what's the total cubic footage of the box?



    Alpine - ASE (local) - Batcap - C&D Tech - CT Sounds - DC - eD - Excessive Amperage - Rainbow

  3. #3
    Kangaroux's Avatar
    Kangaroux is offline I put on



    Join Date
    Dec 2010
    Location
    Maine
    Posts
    9,491
    Post Thanks / Like
    Mentioned
    82 Post(s)

    Re: Critique the Box

    Quote Originally Posted by Buck View Post
    Seems like a pretty long port what's the total cubic footage of the box?
    It's 1 cube. OP, I would make the port 1.75" wide, that should cut down your length a good bit.




  4. #4
    hispls's Avatar
    hispls is online now CarAudio.com Veteran



    Join Date
    Sep 2009
    Location
    Cape Cod, Massachusetts
    Posts
    6,125
    Post Thanks / Like
    Images
    15
    Mentioned
    105 Post(s)

    Re: Critique the Box

    Quote Originally Posted by Buck View Post
    Seems like a pretty long port what's the total cubic footage of the box?
    He said 1 cube.
    I don't like a port with that many bends in it, but whatever. Should function better than prefab.




  5. #5
    Buck's Avatar
    Buck is offline always low Buck is a Supporting Member of the forum!



    Join Date
    May 2008
    Location
    Nashville
    Posts
    18,378
    Post Thanks / Like
    Mentioned
    253 Post(s)

    Re: Critique the Box

    Apparently I can't read. It looks alright to me, may want to cut down on the port area some.



    Alpine - ASE (local) - Batcap - C&D Tech - CT Sounds - DC - eD - Excessive Amperage - Rainbow

  6. #6
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    1cu ft

    I figured the cu ft plus driver displacement, then calculated the port at 2" wide x 10.5 tall, and worked the port around the original 1cu ft box.

    I wanted a wider slot (2") than the 1.5". The 1.5" had me at about 33-36 inches in length. Can't recall exactly, but the narrower the slot, the shorter the port.

    Hope I am not confusing.

    Per the 12volt "Slot Port Length Calculator":
    port width @ 2", port height @ 10.5", box cu ft @ 1, @ 33hz = 48 inches of port.

    Per carstereo "Calculate Your Vent Length":

    Same specs as above = 47 inches of port.

    I could not get WinISD to save what specs I had for the D310D4, so didn't use it.


    edit, just saw that you saw, ha!




  7. #7
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    Quote Originally Posted by hispls View Post
    He said 1 cube.
    I don't like a port with that many bends in it, but whatever. Should function better than prefab.
    Agreed.

    I didn't want to risk a smaller width port and gain port noise. At 1.5", I would still have at least two corners. Unless I widened the box and lessened the depth, I see no alternative.

    Ideas?




  8. #8
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    Quote Originally Posted by Kangaroux View Post
    It's 1 cube. OP, I would make the port 1.75" wide, that should cut down your length a good bit.
    I'll try to work that out. I reckon killing off that last choke point front left (speaker side) and opening it up would make a noticeable difference?




  9. #9
    hispls's Avatar
    hispls is online now CarAudio.com Veteran



    Join Date
    Sep 2009
    Location
    Cape Cod, Massachusetts
    Posts
    6,125
    Post Thanks / Like
    Images
    15
    Mentioned
    105 Post(s)

    Re: Critique the Box

    Quote Originally Posted by acreature View Post
    Agreed.

    I didn't want to risk a smaller width port and gain port noise. At 1.5", I would still have at least two corners. Unless I widened the box and lessened the depth, I see no alternative.

    Ideas?
    Passive radiator?




  10. #10
    Buck's Avatar
    Buck is offline always low Buck is a Supporting Member of the forum!



    Join Date
    May 2008
    Location
    Nashville
    Posts
    18,378
    Post Thanks / Like
    Mentioned
    253 Post(s)

    Re: Critique the Box

    Dude the turns in the box aren't going to make that much of a difference plus he bent them in the right way. All he needs to do imo is bring down the port area a little.



    Alpine - ASE (local) - Batcap - C&D Tech - CT Sounds - DC - eD - Excessive Amperage - Rainbow

  11. #11
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    Quote Originally Posted by hispls View Post
    Passive radiator?
    I have never messed with that idea. Not sure if I want to after doing a quick read. Above my pay grade and skill level.




  12. #12
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    Quote Originally Posted by Buck View Post
    All he needs to do imo is bring down the port area a little.
    Slimming the port to 1.75 drops me to 41-42 in of port.




  13. #13
    Buck's Avatar
    Buck is offline always low Buck is a Supporting Member of the forum!



    Join Date
    May 2008
    Location
    Nashville
    Posts
    18,378
    Post Thanks / Like
    Mentioned
    253 Post(s)

    Re: Critique the Box

    The length of the port is to achieve tuning. The port isn't too long, just too much port area. You see what I'm saying? You're dropping square inches, not port length.



    Alpine - ASE (local) - Batcap - C&D Tech - CT Sounds - DC - eD - Excessive Amperage - Rainbow

  14. #14
    Kangaroux's Avatar
    Kangaroux is offline I put on



    Join Date
    Dec 2010
    Location
    Maine
    Posts
    9,491
    Post Thanks / Like
    Mentioned
    82 Post(s)

    Re: Critique the Box

    The general rule of thumb for port area is 12-16 sqin. per cubic foot. You have 1 cube, so you need 12 - 16 sqin. of port. With a 1.75" wide port, you have roughly 19 in^2 of port area -- which isn't necessarily a bad thing. Ideally for smaller boxes you want to keep the port ratio to 1:8. The minimum port width I would do with a port that's 10.5" tall is ~1.25".




  15. Likes jolly_26 liked this post
  16. #15
    acreature's Avatar
    acreature is offline Mach1smo

    Threadstarter


    Join Date
    Jul 2006
    Location
    The most eastern of the US coast
    Posts
    176
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Critique the Box

    Quote Originally Posted by Buck View Post
    The length of the port is to achieve tuning. The port isn't too long, just too much port area. You see what I'm saying? You're dropping square inches, not port length.
    Lord. My head hurts. I'll keep my day job.




  17. Likes SuperSaeYoung liked this post
Closed Thread
Page 1 of 3 1 2 3 LastLast

Similar Threads

  1. how do i put the sub in the box?
    By anthonyfg in forum Wiring, Electrical and Installation Help
    Replies: 3
    Last Post: 04-22-2002, 04:04 PM
  2. Thinking outside the box
    By mykeys in forum Subwoofers
    Replies: 8
    Last Post: 04-02-2002, 11:51 AM
  3. Replies: 1
    Last Post: 03-15-2002, 04:16 AM
  4. how far from the bottom of the box should my ports be?
    By Unregistered in forum Wiring, Electrical and Installation Help
    Replies: 2
    Last Post: 01-25-2002, 09:00 PM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum