12" Tapped horn |
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Djim69
New Member Joined: 29 August 2010 Location: Benelux Status: Offline Points: 6 |
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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Cone motion has to increase at a 12dB/oct rate.
53hz * 0.707 (one half octave) = 37.5hz Therefore the maximum output for a given cone displacement must be 6dB less for a half octave of bass extension. Note: You must be comparing apples with apples, ie: tapped horn vs tapped horn, or sealed box vs sealed box. A 2 cu ft 2nd order sealed box with an F3 of 30hz can only be 0.18% efficient (84.55dB). A 2 cu ft 4th order vented box with an F3 of 30hz can only be 0.36% efficient (87.56dB). A 2 cu ft 6th order vented box with an F3 of 30hz can only be 0.90% efficient (91.54dB). |
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djk
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