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Some time ago (too long ago really) I was asked by Karma Mobile Audio to design a speaker using their Allure line of drivers which currently include a 6x9, 6.5, and 1" soft dome tweeter. Karma's drivers are designed and built by Audible Physics for the US market. I reached out to Paul Kittinger for his aid in designing a MLTL for this build. I did not want a tall, tower but something that would be easy to build and have solid bass into the lower 40s at least. Well, Paul being Paul designed a cabinet to my dimensions that gets this "car audio" driver into the lower 30s! Simmed Fb is 33hz and F3/10 is 38/27! It is a single fold line with fill in the front lower portion of the line. I used batting because of its consistenecy vs loose fill.
The crossover is a pretty straight forward affair. Second order, third order electrical, woofer, tweeter respectfully resulting in third/5th order slopes and a 2.2khz crossover point. Note that there is no padding resistor on the woofer regardless of the fact that these have about 3-4db of BSC on the woofer! Though the crossover does allow for up to a two ohm padding ahead of the filter for listener preference. These are designed to sit fairly close to a rear wall, about 12" away.
The tweeter mounting is unlike any I have ever seen and is quite clever. There is a rear ring that is threaded onto the body. This makes the flush mount appear as if the tweeter is rear mounted. No real benefit for home audio, but very helpful in car audio! The woofer has both binding posts and terminals, plenty of cooling and a very unique grill if you choose to use it. Overall build quality is superb.
The crossover is a pretty straight forward affair. Second order, third order electrical, woofer, tweeter respectfully resulting in third/5th order slopes and a 2.2khz crossover point. Note that there is no padding resistor on the woofer regardless of the fact that these have about 3-4db of BSC on the woofer! Though the crossover does allow for up to a two ohm padding ahead of the filter for listener preference. These are designed to sit fairly close to a rear wall, about 12" away.
The tweeter mounting is unlike any I have ever seen and is quite clever. There is a rear ring that is threaded onto the body. This makes the flush mount appear as if the tweeter is rear mounted. No real benefit for home audio, but very helpful in car audio! The woofer has both binding posts and terminals, plenty of cooling and a very unique grill if you choose to use it. Overall build quality is superb.
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