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In the Forum: Horn-Loaded Speakers
In the Thread: Midrange driver suggestions
Post Subject: JBL and their Progressive Transition WaveguidesPosted by Romy the Cat on: 1/3/2008
 el`Ol wrote: |
| JBL developed the PT-Waveguides not only because they are easier to produce. They also have less harmonic distortion than biradial horns. Disadvantage: They look far less funky. |
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Why JBL developed their PT-Waveguides and how “better” it might be is very easy question if to look at the JBL objectives. The JBL-like companies, particularly in their horns development, do practically nothing that might be applicable for home listening. The PT profile with its stressed off-axis advantages is not really innovative or “developed”. More shallow horns act more and more as a direct radiator and has wider radiation pattern, it also provides less LF EQ. JBL make a family of compression drivers that meant to work in those low EQ environments and then they “invented” a bogus term Progressive Transition. Sure for PA allocations where DJ need with two speakers to cover wider area of a dancing floor the PT horns are better but who care about sound quality for DJ applications? Interesting that those contemporary “PT-compatible” JBL drivers when they loaded into the “full-EQ horns” do not do very well. Do those drivers do well in PT setting? It is hard to say. Certainly the top of the line JBL PA system do very well, much more interesting than many of their competitors. Still, how serious should we accept those results for home use? I do not think that they are usable at all.
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