Port dimensions?

Discussion in 'Amps and Cabs [BG]' started by Tom Crofts, Mar 7, 2002.

  1. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    I'm building a cabinet and need to know how to work out port dimensions. Do I need info on the speaker I'm gonna be using? Thanks.
  2. bben


    Feb 28, 2002
    Santa Fe, NM
    Yes, you need to know the "Thiele-Small parameters" for the speaker, which will determine first the overall box volume needed and then the port dimensions for tuning the box to the right frequency.

    You should read up on this first, otherwise you don't have much chance of success and will waste your time and plywood.

    I recommend "The Loudspeaker Design Cookbook" by Vance Dickason, readily available here in the USA, not sure about elsewhere.
  3. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    Yeah, I looked for that book over here but no one seems to have it, however I got the Loudspeaker and Headphone handbook and loudspeakers for musicians from the library...

    I read up on it a little bit, I'll try to find some more stuff on the web.