Coupled cavity peak vs Z in Karlson type - ping Moray - freddyi

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Coupled cavity peak vs Z in Karlson type - ping Moray

75.109.11.25

hey Moray James - not sure how would factor into discussion with MP - maybe best to leave out as is confusing and not germane to original concepts. seems to me there would be some predictable cavity possibilites upon response.
wish my old K15 were built right - may have been accident when they fell apart and I reglued them without thinking - front shelf is too long gapping only 3.125" fromn wingess and chokes HF fron reaching upper half of chamber screwing up tonal balance more than usual
a few examples
32"x16"x21" coupler with 23 degree baffle and 10 degree port board
Effect upon same coupler of adding a 6" cap forming a 20l stub connected to front chamber at top via a ~2" gap
Effect of 6" cap versus no cap
Further effect on 32" tall coupler by adding a 14" high cap connected to front chamber
via 2" slot
Oops - looks like 14" added too much and de-tuned (?)
Simple bandpass simulation of above situation
1958 6 slit tyle K12 with 70hz fs rated coax
Acoustic Control 115BK with EV 15L
Stock Karlson 15
Low tuned Karlson 15
Test coupler 42 inches tall and about 10% higher in bulk than K15
Sealed case of a 3 cubic foot rear chamber with 18" woofer wings on vs off
- dispersion window is kinda odd
Impedance of sealed klam 18 - the 2nd peak is of interest

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Topic - Coupled cavity peak vs Z in Karlson type - ping Moray - freddyi 15:36:25 12/12/06 (0)

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