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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: 147163" data-attributes="member: 9926"><p>Re: 60 Degree DIY Mid Hi</p><p></p><p></p><p>Hi Peter,</p><p> </p><p>What you and we need – uncolored sound from speaker – therefore we need an accurate description of loudspeaker’s performance, and only of the loudspeaker but as much as possible complete description. There I should turn to the paper:</p><p><a href="https://soundforums.net/content/3636-Equalizing-loudspeakers" target="_blank">https://soundforums.net/content/3636-Equalizing-loudspeakers</a></p><p><a href="http://aplaudio.com/downloads/Equalizing_loudspeakers.pdf" target="_blank">http://aplaudio.com/downloads/Equalizing_loudspeakers.pdf</a></p><p> </p><p> </p><p>Due to high complexity of loudspeaker’s directivity, the one point (on axes) measurement is insufficient to describe loudspeaker’s performance (theoretically it possible to find a loudspeaker that is working all the way in piston motion and has equalized directivity). There for TDA EQ is using multiple points (25 as first idea) and making Impulse Response that is representing all that points at first processing step. That IR is stored in the result folder. The second step is to find the equalizer that corrects this IR by use of amplitude information of TDA processing.</p><p>TDA curves before and after EQ are helping us to understand that result.</p><p> </p><p>The result of TDA EQ and the result of anechoic measurement (classical steady state) should be very similar or even identical. But you should keep in mind the 3:1 rule even if you have your system flown 4m high for the real world conditions.</p></blockquote><p></p>
[QUOTE="Raimonds Skuruls, post: 147163, member: 9926"] Re: 60 Degree DIY Mid Hi Hi Peter, What you and we need – uncolored sound from speaker – therefore we need an accurate description of loudspeaker’s performance, and only of the loudspeaker but as much as possible complete description. There I should turn to the paper: [URL]https://soundforums.net/content/3636-Equalizing-loudspeakers[/URL] [URL]http://aplaudio.com/downloads/Equalizing_loudspeakers.pdf[/URL] Due to high complexity of loudspeaker’s directivity, the one point (on axes) measurement is insufficient to describe loudspeaker’s performance (theoretically it possible to find a loudspeaker that is working all the way in piston motion and has equalized directivity). There for TDA EQ is using multiple points (25 as first idea) and making Impulse Response that is representing all that points at first processing step. That IR is stored in the result folder. The second step is to find the equalizer that corrects this IR by use of amplitude information of TDA processing. TDA curves before and after EQ are helping us to understand that result. The result of TDA EQ and the result of anechoic measurement (classical steady state) should be very similar or even identical. But you should keep in mind the 3:1 rule even if you have your system flown 4m high for the real world conditions. [/QUOTE]
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60 Degree DIY Mid Hi - AKA PM60
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