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<blockquote data-quote="Peter Morris" data-source="post: 147983" data-attributes="member: 652"><p>Re: TDA Users</p><p></p><p></p><p></p><p>It looks the same for both the 60 and 90 degree version. I just used one position for the mic which was about 4.0 to 4.5m high. The speaker was about 3.5m high pointing up. Its hopefully a free field measurement with no reflections.</p><p></p><p>I used Systune initially, and fine tuned the response with TDA EQ. I also tried a different approach this time. I EQ the natural roll off of the double 12" to match an exact 12dB 100Hz Butterworth to about -9dB. I then applied a 12dB Butterworth high pass. Two Butterworth responses in series is a 24dB LR <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />. This gave me much better low frequency time domain behaviour than I had before. The DIYs now integrate perfectly and seamlessly with the subs.</p><p></p><p>It was interesting to hear the difference from what I did with Systune, and then with some slight adjustments from TDA. It went from really nice to very real.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 147983, member: 652"] Re: TDA Users It looks the same for both the 60 and 90 degree version. I just used one position for the mic which was about 4.0 to 4.5m high. The speaker was about 3.5m high pointing up. Its hopefully a free field measurement with no reflections. I used Systune initially, and fine tuned the response with TDA EQ. I also tried a different approach this time. I EQ the natural roll off of the double 12" to match an exact 12dB 100Hz Butterworth to about -9dB. I then applied a 12dB Butterworth high pass. Two Butterworth responses in series is a 24dB LR :-). This gave me much better low frequency time domain behaviour than I had before. The DIYs now integrate perfectly and seamlessly with the subs. It was interesting to hear the difference from what I did with Systune, and then with some slight adjustments from TDA. It went from really nice to very real. [/QUOTE]
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