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Audio and Video Talk
General Discussion
REW Measurements of AlleyCat's Room- Take 2
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<blockquote data-quote="AlleyCat" data-source="post: 1172529" data-attributes="member: 2194"><p>For interest sake, here’s the measurement taken at the National Research Council Of Canada by Soundstage! Network of the <strong>Vivid B1 Decade </strong>:</p><p></p><p>[ATTACH=full]40420[/ATTACH]</p><p><a href="https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1527:nrc-measurements-vivid-audio-oval-b1-decade-loudspeakers&catid=77:loudspeaker-measurements&Itemid=153" target="_blank">https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1527:nrc-measurements-vivid-audio-oval-b1-decade-loudspeakers&catid=77:loudspeaker-measurements&Itemid=153</a></p><p></p><p>Also note from that review :</p><p></p><p>“In the charts plotted for the measurements of the original B1, a large cancellation of about 8dB was visible just below 400Hz when the microphone was placed directly in front of the speaker, on the tweeter axis -- the result of the outputs of the front and rear woofers summing out of phase. But that cancellation didn’t carry the entire way around the speaker. When the mike was pointed at the middle of either side of the speaker, from the same distance away as when measured on axis to the tweeter, the woofers’ cancellation was almost completely eliminated…..</p><p></p><p>Dickie was still working on the new woofers and crossover to mitigate this cancellation. Our measurements show that his work was worthwhile; the cancellation on axis is now only about 2dB -- a reduction of 6dB, which is significant.“</p></blockquote><p></p>
[QUOTE="AlleyCat, post: 1172529, member: 2194"] For interest sake, here’s the measurement taken at the National Research Council Of Canada by Soundstage! Network of the [B]Vivid B1 Decade [/B]: [ATTACH type="full" alt="1713791042399.gif"]40420[/ATTACH] [URL]https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1527:nrc-measurements-vivid-audio-oval-b1-decade-loudspeakers&catid=77:loudspeaker-measurements&Itemid=153[/URL] Also note from that review : “In the charts plotted for the measurements of the original B1, a large cancellation of about 8dB was visible just below 400Hz when the microphone was placed directly in front of the speaker, on the tweeter axis -- the result of the outputs of the front and rear woofers summing out of phase. But that cancellation didn’t carry the entire way around the speaker. When the mike was pointed at the middle of either side of the speaker, from the same distance away as when measured on axis to the tweeter, the woofers’ cancellation was almost completely eliminated….. Dickie was still working on the new woofers and crossover to mitigate this cancellation. Our measurements show that his work was worthwhile; the cancellation on axis is now only about 2dB -- a reduction of 6dB, which is significant.“ [/QUOTE]
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REW Measurements of AlleyCat's Room- Take 2
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