| Re: Alternate idea for 7Pi midhorn enclosure? [message #75406 is a reply to message #75400] |
Fri, 01 February 2013 08:01   |
JCDC
Messages: 43
Registered: August 2010
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Baron |
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| Wayne Parham wrote on Thu, 31 January 2013 14:34 |
... The size where the chamber is large enough to be effectively "infinite" is 0.35ft3. That's not a very large chamber, but again, this is a horn and the volumes are different for horns than they are for direct radiators.
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For some reason I thought I recall you saying that the rear chamber is sized to be "small" and provide a bit of a freq boost near 200Hz. ?!? Is this correct, or am I doing the very thing you mentioned--applying box theory to horns.
| Wayne Parham wrote on Thu, 31 January 2013 14:34 |
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The horn is essentially designed to have an open rear chamber, but we don't want the rear wave bouncing around, so we need it contained and damped.
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So would leaving the driver open backed and then covering it with a few layers of insulation be good? Or is the driver still producing lower freq (<200Hz) so the insulation is less effective ...
Hmm, the 8 Pi always seemed elegant to me (1 driver from 20-2000 and with two technologies); now it's even more intriguing!
Cheers,
Jeff
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