billfitzmaurice
Seasoned Veteran
Last Activity: Yesterday, 06:59 AM
Joined: 11-11-2006
Location: New Hampshire
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I have no issues with using full range drivers (they shouldn't call them point source, it's an improper application of the term) in an array, but not... -
And at 30 degrees off axis? 45 degrees? That's what usually determines how high any driver should be used. Since they don't show off-axis charts I'd take...Leave a comment:
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Fixed that for ya. A wise man never assumes that all others share his own limitations....Leave a comment:
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And the only way you could do it, Sheldon, is with what musicians and composers have referred to as charts for the last 4000 years, give or take. Acoustical...Leave a comment:
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Really, or someone who claims that he can use a musical instrument to play a song that he's never heard. Impossible! The only way you could do that is...Leave a comment:
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I said nothing about group delay. The problems that can arise with a crossover in the 300-700Hz range have been well known since the 1930s. Check your...Leave a comment:
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That's where our ears are most sensitive to the effects of delays between multiple sources.
Use a pair of eights instead....Leave a comment:
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Time align is most critical in the 300-700Hz range, to the extent that it can be very audible when it's off, so if you lack the ability to time align...Leave a comment:
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Anything below 800Hz can be an issue, so it's an area to be avoided.Leave a comment:
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I've seen that said many times as well, but my testing hasn't born it out. On the last major vented cab project I did I used round ports mounted in the...Leave a comment:
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It's more of an old wives tale, although there is some truth to it. BTW, a slot isn't square, and that's the source of the tale. All ports have a section...Leave a comment:
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Beryllium doesn't make a sound, no more than does paper, aluminum, titanium, magnesium, polypropylene or any other material that driver diaphragms are...Leave a comment:
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The DCR of a coil is proportional to the length of wire, but Le isn't, so that scenario doesn't work. In any event you'll never hear the difference within...Leave a comment:
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It's not worth the trouble.Leave a comment:
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If it's not flush mounted in a wall, or in the ground, it's not an IEC baffle, it's just a piece of wood....Leave a comment:
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Name one of their claims that is accurate.Leave a comment:
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The standard is just a 2x2 foot piece of plywood, placed in a non-reflective wall to measure driver raw response. With a finished cab there's no need...Leave a comment:
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I measure ground plane at 4 meters, translating the result to a 1 meter figure. That's not so practical for the suspended mic measurement, so I do that...Leave a comment:
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With a finished speaker you don't need a hole. Put the cab on its back, measure it, splice that measurement above the baffle step to a ground plane measurement...Leave a comment:
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That should be fine. I never use any kind of mass loading on panels, a well built cab doesn't need it. I do use it in my car doors, where that's the only...Leave a comment:
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