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Re: 4 July Hi-Fi

That is a B&C 18SW115-4. The high-pass is 24 dB/oct Butterworth at 25 Hz. The low-pass is 24 dB/oct Linkwitz-Riley at 90 Hz.

I attribute the nice "hole" to a near ideal environment: No nearby reflecting surfaces in front or behind (other than the flat, hard ground) and a nice straight crack down the middle of the concrete street for me to use to position the measurement mic exactly on axis.

Silas: Thanks for pointing out the snipping tool. I was so busy hating W7 that I didn't imagine that it could have any useful new features ~~:smile:

--Frank

<blockquote data-quote="Frank Koenig" data-source="post: 97221" data-attributes="member: 416">Re: 4 July Hi-FiThat is a B&amp;C 18SW115-4. The high-pass is 24 dB/oct Butterworth at 25 Hz. The low-pass is 24 dB/oct Linkwitz-Riley at 90 Hz.I attribute the nice &quot;hole&quot; to a near ideal environment: No nearby reflecting surfaces in front or behind (other than the flat, hard ground) and a nice straight crack down the middle of the concrete street for me to use to position the measurement mic exactly on axis.Silas: Thanks for pointing out the snipping tool. I was so busy hating W7 that I didn&#039;t imagine that it could have any useful new features <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />~<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile&nbsp; &nbsp; :-)"&nbsp; data-smilie="1"data-shortname=":-)" />~:smile:--Frank</blockquote>

[QUOTE="Frank Koenig, post: 97221, member: 416"] Re: 4 July Hi-Fi That is a B&C 18SW115-4. The high-pass is 24 dB/oct Butterworth at 25 Hz. The low-pass is 24 dB/oct Linkwitz-Riley at 90 Hz. I attribute the nice "hole" to a near ideal environment: No nearby reflecting surfaces in front or behind (other than the flat, hard ground) and a nice straight crack down the middle of the concrete street for me to use to position the measurement mic exactly on axis. Silas: Thanks for pointing out the snipping tool. I was so busy hating W7 that I didn't imagine that it could have any useful new features :)~:-)~:smile: --Frank [/QUOTE]

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