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<blockquote data-quote="Kimo Lewis" data-source="post: 26699" data-attributes="member: 497"><p>Re: FBT Verve 12m</p><p></p><p>Just as a frame of reference, here are the manufacturer's specs for the FBT Verve 12m which uses some kind of B&C coax driver:</p><p></p><p><a href="http://www.fbtusa.net/files/Verve_12m_Polar_patterns.pdf" target="_blank">www.fbtusa.net/files/Verve_12m_Polar_patterns.pdf</a></p><p><a href="http://www.fbtusa.net/FBTVerve12mmonitortc.html" target="_blank">www.fbtusa.net/FBTVerve12mmonitortc.html</a></p><p></p><p>As you can see, the polars get very narrow at 2000 hz, and appears to be the same at 2000 hz as it does at 16000 hz. This also appears to be at the crossover region which is stated to be at 1.8k hz. The Q factor shows a very narrow pattern at crossover. My hope is we can do better at 2000 hz. But the narrowing at 2000 hz may be a result of the woofer and tweeter interaction and not the crossover. Who knows?</p><p></p><p>The amplitude response looks very respectable at plus or minus 2.5 db. We would be very lucky to have the same amplitude response.</p><p></p><p>The problem with all these measurements is the manufacture did not state how much smoothing was applied.</p></blockquote><p></p>
[QUOTE="Kimo Lewis, post: 26699, member: 497"] Re: FBT Verve 12m Just as a frame of reference, here are the manufacturer's specs for the FBT Verve 12m which uses some kind of B&C coax driver: [URL="http://www.fbtusa.net/files/Verve_12m_Polar_patterns.pdf"]www.fbtusa.net/files/Verve_12m_Polar_patterns.pdf[/URL] [URL="http://www.fbtusa.net/FBTVerve12mmonitortc.html"]www.fbtusa.net/FBTVerve12mmonitortc.html[/URL] As you can see, the polars get very narrow at 2000 hz, and appears to be the same at 2000 hz as it does at 16000 hz. This also appears to be at the crossover region which is stated to be at 1.8k hz. The Q factor shows a very narrow pattern at crossover. My hope is we can do better at 2000 hz. But the narrowing at 2000 hz may be a result of the woofer and tweeter interaction and not the crossover. Who knows? The amplitude response looks very respectable at plus or minus 2.5 db. We would be very lucky to have the same amplitude response. The problem with all these measurements is the manufacture did not state how much smoothing was applied. [/QUOTE]
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