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Low Earth Orbit
DIY Audio
60 Degree DIY Mid Hi - AKA PM60
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<blockquote data-quote="Raimonds Skuruls" data-source="post: 146636" data-attributes="member: 9926"><p>Re: 60 Degree DIY Mid Hi</p><p></p><p></p><p></p><p>Hi Don,</p><p> </p><p>Nice job! Nice results!</p><p>Let’s go forward with accuracy!</p><p>Peter has already pointed to resonances. I would like to do that in more details.</p><p>Please take a look on your images attached.</p><p>You can see resonances in both diagrams: as smearings on TDA image and bumps on AFR image as well.</p><p>The AFR curve of TDA is not „showing” resonances in all details because the TDA process is for timing analysis – the resolution of AFR is sacrificed for high timing resolution.</p><p>Another story is with TDA EQ. It is capable to hook out AFR information to be used for EQ.</p><p>Let’s try how it works for your speaker. Please download the testsignal of TDA EQ</p><p><a href="http://aplaudio.com/downloads/TS_48_96k_25p.rar" target="_blank">http://aplaudio.com/downloads/TS_48_96k_25p.rar</a></p><p>Play it and record by use of measurement mic. Send recorded file to me.</p><p>It contains 25 sweeps. You should move the measurement mic all the recording time to cover some square (25 x 25 points) in front of your speaker to cover some + - 5...10 degr. around the axes.</p><p> </p><p>Good luck,</p><p> </p><p>Raimonds</p><p></p><p></p><p>[ATTACH]154428[/ATTACH][ATTACH]154429[/ATTACH]</p></blockquote><p></p>
[QUOTE="Raimonds Skuruls, post: 146636, member: 9926"] Re: 60 Degree DIY Mid Hi Hi Don, Nice job! Nice results! Let’s go forward with accuracy! Peter has already pointed to resonances. I would like to do that in more details. Please take a look on your images attached. You can see resonances in both diagrams: as smearings on TDA image and bumps on AFR image as well. The AFR curve of TDA is not „showing” resonances in all details because the TDA process is for timing analysis – the resolution of AFR is sacrificed for high timing resolution. Another story is with TDA EQ. It is capable to hook out AFR information to be used for EQ. Let’s try how it works for your speaker. Please download the testsignal of TDA EQ [URL]http://aplaudio.com/downloads/TS_48_96k_25p.rar[/URL] Play it and record by use of measurement mic. Send recorded file to me. It contains 25 sweeps. You should move the measurement mic all the recording time to cover some square (25 x 25 points) in front of your speaker to cover some + - 5...10 degr. around the axes. Good luck, Raimonds [ATTACH=CONFIG]154428.vB5-legacyid=13588[/ATTACH][ATTACH=CONFIG]154429.vB5-legacyid=13589[/ATTACH] [/QUOTE]
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60 Degree DIY Mid Hi - AKA PM60
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