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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Andy Turner" data-source="post: 204095" data-attributes="member: 10677"><p>I am still working on tuning this monster, which is not easy :0)</p><p>The results so far is far from good.</p><p></p><p>Until now I have put the speaker flat on it's back in the middle of my lawn with the mike hanging 1 meter above the horn, dead center of the speaker just above the HF950 horn.</p><p></p><p>I have tried tuning both with a dbx Driverack PA+ using all 2+3 PEQ's , and the input EQ and also a Powersoft with dsp, using only about 5-6 PEQ's, so I know I can just keep on adding filters. See the enclosed screen shots from REW.</p><p></p><p>dbx: </p><p>[ATTACH]204098[/ATTACH]</p><p>Powersoft: </p><p>[ATTACH]204099[/ATTACH]</p><p>Both results are not sounding right. Way too much 3-400hz, even though the measurements claims differently and further up in the frequency range I get some strange response with certain records. What am I doing wrong? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />~:-(~:sad:</p><p></p><p>When measuring the 12" horns alone still with the mike in the middle 1 meter above HF950 I get a steep roll of at 600hz?(Low pass turned off). When moving the mike to the side, just above one of the horn mouth's at about 30 cm I get a less steep roll off, but then some phase issues, making it difficult to use. </p><p></p><p>I think the d'apploito arrangement could call for a different approach when measuring? Is something going on that I don't know of? I know Peter Morris put them 4 meters up, - maybe that is the only way to get usefull data? And then how far from the mike?</p><p></p><p>I tried putting the mike out on 2, 4, and 8 meters, while the speaker standing upright on the ground and the mike at 50 cm. height and the results just kept getting more and more strange the further I got away, with a big whole in the mid frequencies. Very strange :roll:.</p><p></p><p>There's a lot to learn from this project, - let's start with having useful measurement data.</p><p></p><p>All help, input etc. will be very much appreciated.</p></blockquote><p></p>
[QUOTE="Andy Turner, post: 204095, member: 10677"] I am still working on tuning this monster, which is not easy :0) The results so far is far from good. Until now I have put the speaker flat on it's back in the middle of my lawn with the mike hanging 1 meter above the horn, dead center of the speaker just above the HF950 horn. I have tried tuning both with a dbx Driverack PA+ using all 2+3 PEQ's , and the input EQ and also a Powersoft with dsp, using only about 5-6 PEQ's, so I know I can just keep on adding filters. See the enclosed screen shots from REW. dbx: [ATTACH=JSON]204098.vB5-nodeid=204098[/ATTACH] Powersoft: [ATTACH=JSON]204099.vB5-nodeid=204099[/ATTACH] Both results are not sounding right. Way too much 3-400hz, even though the measurements claims differently and further up in the frequency range I get some strange response with certain records. What am I doing wrong? :(~:-(~:sad: When measuring the 12" horns alone still with the mike in the middle 1 meter above HF950 I get a steep roll of at 600hz?(Low pass turned off). When moving the mike to the side, just above one of the horn mouth's at about 30 cm I get a less steep roll off, but then some phase issues, making it difficult to use. I think the d'apploito arrangement could call for a different approach when measuring? Is something going on that I don't know of? I know Peter Morris put them 4 meters up, - maybe that is the only way to get usefull data? And then how far from the mike? I tried putting the mike out on 2, 4, and 8 meters, while the speaker standing upright on the ground and the mike at 50 cm. height and the results just kept getting more and more strange the further I got away, with a big whole in the mid frequencies. Very strange :roll:. There's a lot to learn from this project, - let's start with having useful measurement data. All help, input etc. will be very much appreciated. [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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