Designing a 4th order 3 way passive crossover

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#123
That's really going to depend on what you like 🙂

I have a few CD's that I always turn to when testing a new setup.

Dire Straights "Love over gold"
"Ella and Louis" (verve remaster)
Jenifer Warnes "Famous blue raincoat"
Nick Cave "The boatmans call"
Pink Floyd "The division bell" (this one will sound bad if you have anything not quite right)
White stripes "Elephant" (this one will sound VERY bad and rushing for the volume control if you have anything not quite right, and it may not just be the speakers...).

Tony.
 
#126
Commanderlake said:
Treble on the vocals on the Pink Floyd song sounds slightly fuzzy but I suspect that may be original, everything else sounds flawless.
I just wish I had some high end speakers to compare them to.
Click to expand...
There comes a time with acoustics when the issues just aren't obvious, since sound isn't visible, and I turn to guidelines to make decisions, which means putting faith in all the tests and papers describing studies that have been done. For the most part I'd say this hasn't let me down.

As an example, putting some damping material down the front edges of your speakers, or around the tweeters should demonstrate some of what might be achieved by rounding your cabinet edges to reduce diffraction.
 
#127
The fuzzy treble is what I was talking about..... I found with my speakers that the first iteration of the crossover sounded very good on a lot of material but it sounded bad on the Pink Floyd. I didn't determine exactly which thing was the issue, but the 2nd iteration of the crossover fixed it.

The things that were different in the 2nd iteration were:

  • 4th order acoustic slope as opposed to original 2nd order acoustic slope
  • much better phase tracking and very good reverse null compared to original.
I suspect that the biggest change was due to the move to 4th order slopes, Either the tweeter was getting IM distortion from the dense lower frequency content in the tracks, OR the breakup on the midrange was not adequately suppressed by the 2nd order filter. Probably it was a combination of the two.


If you have a good set of headphones have a listen to the Pink floyd and see if you hear the same fuzziness, if you do it could be the recording (I don't think so) or it could be your source/amp...


Tony.
 
#130
Hello all , I'm looking to build set of home spakers , rather large ported enclosures using two 12" woofers , high quality jbl compression drivers for mids , and high quality tweeter units - 1 for each enclosure . My goals are high power handling , resonably flat response , down to 22-25 hz , and crystal clarity and definition . I realize the disparity of sensitivity beween the low frequecy drivers and the horns , tweeters . I am looking for input/feedback suggestions concerning use of 4th order crossovers , also adequate circuit protection , and sensitvity matching
 
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