Posted by Ian [ 68.183.19.66 ] on May 04, 2007 at 21:23:19:

I made a prototype Pi midrange horn, but with a B&C 8PE21 driver and I have 2 problems. One is a huge dip in response at 1khz on axis. It moves to about 900hz and gets worse off-axis horizontally.

The other is an odd impulse response with a second positive pulse a short time(about .2ms) after the initial pulse. This may be reflection off the back of the enclosure, which is 4" deep, but I'm not sure.

I first measured the horn without an enclosure, but the 1khz dip seemed even worse, which I thought was due to backwave cancellation, but apparently not.

Replies:

• Impulse Response - Ian 21:24:35 05/04/07 (9)
  • B&C 8PE21 - Wayne Parham 18:43:49 05/05/07 (8)
    • Re: B&C 8PE21 - swett 22:54:06 05/07/07 (7)
      • Midhorn parameters and what changes what - Wayne Parham 12:00:27 05/08/07 (6)
        • Re: Midhorn parameters and what changes what - Ian 17:02:38 05/12/07 (5)
          • With top and bottom transitions - Ian 17:08:16 05/12/07 (4)
            • Re: With top and bottom transitions - Ian 17:11:13 05/12/07 (3)
              • Re: With top and bottom transitions - Wayne Parham 10:30:18 05/13/07 (2)
                • Re: With better top and bottom transitions - Ian 19:04:42 05/13/07 (1)
                  • Re: With better top and bottom transitions - Wayne Parham 12:27:49 05/14/07 (0)