Posted by John B. on December 02, 2001 at 15:51:23

I have the four pi thermionic plans, and I've already started assembling the boxes - parts are and will be on order. I fully intend to build the four pi's, but would like my knowledge as complete as possible.To this end, I do, however, have a question.

Using the spice tools and circuit models you provide; and other number crunching and plotting tools:

No matter how I analyze and model the system I seem to predict a 3 or so octave wide notch in the response centered at about 2000Hz. Am I correct? The notch is apparently crossover generated, and I can't find any component of the system which compensates, or for which it compensates.

I imagine this is probably a more complex issue than I am assuming - what with phase cancellations and so forth. But it bothers me :) and inquiring minds want to know.

Thanks.

• Compensation for compression horns - Wayne Parham 20:23:10 12/02/01 (3)
  • Wayne, I have a question... - Adam 20:58:14 12/02/01 (2)
    • Eminence PSD2002 crossover frequency - Wayne Parham 01:32:54 12/03/01 (1)
      • Re: Eminence PSD2002 crossover frequency - Adam 12:27:58 12/03/01 (0)