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Low Earth Orbit
DIY Audio
60 Degree DIY Mid Hi - AKA PM60
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<blockquote data-quote="Peter Morris" data-source="post: 140458" data-attributes="member: 652"><p>Re: 60 Degree DIY Mid Hi</p><p></p><p>Here are some preliminary off axis plots with a 700Hz crossover. I went well beyond the nominal pattern of the box to see where things would fall apart - it was a bit windy and it made getting a good coherence a little difficult.</p><p></p><p>1) - 0 degrees to about 50 degree off axis in roughly equal increments</p><p></p><p>2) - 0 degrees to about 40 degree off axis in roughly equal increments</p><p></p><p>3) - 700Hz Vs 500Hz crossover - magenta line 500Hz, green 700Hz, the orange plot is zero degrees reference.</p><p></p><p>There is an issue around 1K2 where the vertical response gets a bit wide, but there is nothing I can do about it unless a much taller HF horn flare is used. The area between 500 to 900Hz can be improved by lowering the crossover to around 500Hz. The HF driver will happily operate there but I'm not sure how hard it will be able to be driven ... still work in progress ... maybe 600Hz with the 60 degree version will be the optimum ????</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 140458, member: 652"] Re: 60 Degree DIY Mid Hi Here are some preliminary off axis plots with a 700Hz crossover. I went well beyond the nominal pattern of the box to see where things would fall apart - it was a bit windy and it made getting a good coherence a little difficult. 1) - 0 degrees to about 50 degree off axis in roughly equal increments 2) - 0 degrees to about 40 degree off axis in roughly equal increments 3) - 700Hz Vs 500Hz crossover - magenta line 500Hz, green 700Hz, the orange plot is zero degrees reference. There is an issue around 1K2 where the vertical response gets a bit wide, but there is nothing I can do about it unless a much taller HF horn flare is used. The area between 500 to 900Hz can be improved by lowering the crossover to around 500Hz. The HF driver will happily operate there but I'm not sure how hard it will be able to be driven ... still work in progress ... maybe 600Hz with the 60 degree version will be the optimum ???? [/QUOTE]
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60 Degree DIY Mid Hi - AKA PM60
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