08-14-2017 Post does not mapped to Knowledge Tree kodomo Posts 69 Joined on 06-20-2015 Post #: 26 Post ID: 23362 Reply to: 23360 Why not 3 octaves Why dont you use your midrange horn with the JBL from 600hz to 4800hz? I think it would have a fairly flat and good response and tt wont be beaming. It works with the tractrix 1000, I have done it before. I then tried my Radian 475be with JMLC1400 from 4500 to 9000hz and its even better. So even 1400hz horn work without problems, and matches with the tractrix 200. Do not be afraid to try because of what has been said before. I have a much more open and coherent sound with this setup.

08-14-2017 Post does not mapped to Knowledge Tree martinshorn Germany Posts 114 Joined on 04-14-2017 Post #: 27 Post ID: 23363 Reply to: 23361 Nice flaws Hi. I got different oppinion bout the XO.For sure it has influence on the lobing. Definately, depending on which filter type u use, it will create different on- and off axis response. E.g. i like cutting the supertweeter at 8k with butterworth even order. will give you a +3db peak on axis, but a linear average (all axes) response.This is nice as the 8k peak gives a touch xtra resolution and stage size. The overall balance is still fine. The next favorite XO between mid & hi is 3 or 3.5k. Ears most sensitive in that region. Many people, listening to very loud female voice especially, like to dipthe response in that region (bbc dip). Thats according to Linkwitz the region where our ears got different response depending on the listening angle.So what i do, i cross at 3.5k with an linkwitz (or any other flat summing -6dB XO point) filter, that gives me linear on axis response, but an overall energy dip of -3dB xactly there. Which fades the indirect sound a tiny bit to smoothen "the shout". Another region of sensitivity is 200Hz. Below youre very sensitive to phase shifts, above less.  Also one should try not to have alisson effects of surrounding walls near the XO points. Generally. This is the worst of all. Last but not least, try to measure more. Not just RTA. But hi-res sinus sweep. Try outdoor measure. Gives you real hi-res curves and unvieles weak spots of the driver. Especially distortion. Try not to reach amplitude ripples on the top. Most of all, try to cross to highpass before the D3 odd harmonic raises. The measures will narrow your best options down more than you want cheersjosh

08-14-2017 Post does not mapped to Knowledge Tree Superlian Posts 2 Joined on 08-13-2017 Post #: 28 Post ID: 23364 Reply to: 23361 Crossover point Romy, Radian 475be performs best over 2K. It has some distortion around 1700 Hz. I think in general that 1 inch drivers should not be used lower than 2K. I understand your point that the practical implementation is more important than a "best practice" crossover point. Kodomo, i will try to borrow a JMLC1400 and test your solution. Martinshorn, very interresting ideas, i will also test them. THX for replies