Posted by spkrman57 [ 131.64.9.116 ] on March 29, 2005 at 13:32:11:

In Reply to: Uniform DI verses Collapsing DI posted by Wayne Parham on March 27, 2005 at 16:34:02:

Wayne,
The "DI" factor loses me. I know I just tried out my 1st JBL compression driver(2426J). I used the 4 Pi-pro figures(15 ohm shunt and 33 ohm series/.33 ufd cap). I also used .68 ufd bypass caps on the PE 1.6 khz hi-pass crossover.

So far I think the caps are still new and not smoothed out(less than 2 hrs time on them). I find the JBL to be rather bright in the upper midrange/lower treble area used on the Martinelli horn. I know that the 2426J is a 16 ohm driver, but I have used Altec 8 ohm and 16 ohm drivers without changing up the crossover with little difference of sound.

I think the JBL with titanium diaphram is more brittle sounding than the aluminum of the Altec drivers I have used. I set up the crossover this time with easy "connect/disconnect" terminals to swap out the horns quickly.

I have my Altec 902B on my 650hz Edgar horn and will be trying it out tonight. I think the JBL needs less HF compensation than the Altec 1" drivers.

Ron

Replies:

• Re: Directivity Index, Collapsing DI, etc. - Wayne Parham 15:45:32 03/29/05 (8)
  • Re: Directivity vs Omni-directional - GarMan 08:39:24 03/31/05 (2)
    • Re: Directivity vs Omni-directional - mike.e 20:58:53 04/06/05 (0)
    • Uniformity - Wayne Parham 09:07:39 03/31/05 (0)
  • I understand a little bit better now! - spkrman57 13:01:41 03/30/05 (4)
    • Re: I understand a little bit better now! - Wayne Parham 18:58:56 03/30/05 (3)
      • Re: I understand a little bit better now! - spkrman57 07:35:56 03/31/05 (2)
        • Re: I understand a little bit better now! - Bill Martinelli 21:28:35 03/31/05 (0)
        • Re: I understand a little bit better now! - Wayne Parham 08:10:38 03/31/05 (0)