Posted by Wayne Parham [ 151.193.213.24 ] on December 14, 2005 at 09:25:22:

In Reply to: 2500 hz hump posted by Paul C. on December 13, 2005 at 17:33:11:

There are a couple of things that cause midrange response to rise in a midwoofer. One is collapsing directivity and the other is cone flex resonance, modes where the cone is twisting and a resonance sets up on the membrane. Collapsing DI causes a flat line of rising response but resonance modes cause peaks. You can equalize collapsing DI in the crossover, and it is a useful feature when paired with a HF horn, because you can crossover in the frequency range where directivity is similar between the two subsystems. Breakup modes are a little trickier to work with, because they make the driver surface act a sort of like a chaotic array of sound sources that change with respect to frequency.

Replies:

• Re: 2500 hz hump - Spinjack 12:49:44 12/14/05 (8)
  • Re: 2500 hz hump - Wayne Parham 15:10:44 12/14/05 (7)
    • Re: 2500 hz hump - Matts 18:04:15 12/14/05 (6)
      • Re: BTW.... - Matts 18:05:25 12/14/05 (5)
        • Re: BTW.... - Paul C. 21:04:51 12/14/05 (4)
          • Re: BTW.... - Spinjack 08:57:47 12/15/05 (3)
            • bad breakup - tofo 23:41:10 12/16/05 (2)
              • Re: bad breakup - Spinjack 08:12:02 12/19/05 (1)
                • Re: bad breakup - tofo 19:04:39 12/19/05 (0)
• Re: 2500 hz hump - Paul C. 09:43:23 12/14/05 (0)