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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Peter Morris" data-source="post: 208466" data-attributes="member: 652"><p>The roll off is 12 dB but the shape probably will not match a Butterworth especially in this case where the LF section is more or less a 4th order band pass tuned around 500Hz. </p><p></p><p>This tuning produces a peak of about 8-10 dB that has to be corrected, but you do get more SPL and in this case the pattern control I wanted because of the the location of the two LF exits. </p><p></p><p>I EQ-ed it flat with the Butterworth shape roll off so that when I applied another 12 dB Butterworth (electrical crossover) I ended up with a 24 dB LR.</p><p></p><p>In practice I just took my best guess, added a 12 dB Butt electrical filter and fine tuned the end result to 24 dB LR</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 208466, member: 652"] The roll off is 12 dB but the shape probably will not match a Butterworth especially in this case where the LF section is more or less a 4th order band pass tuned around 500Hz. This tuning produces a peak of about 8-10 dB that has to be corrected, but you do get more SPL and in this case the pattern control I wanted because of the the location of the two LF exits. I EQ-ed it flat with the Butterworth shape roll off so that when I applied another 12 dB Butterworth (electrical crossover) I ended up with a 24 dB LR. In practice I just took my best guess, added a 12 dB Butt electrical filter and fine tuned the end result to 24 dB LR [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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