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In Reply to: More Pics of K-Slot horn posted by RCA-Fan on July 07, 2004 at 05:04:46:
very sharp! which tweet is that? and is that the 208 or the 168? what did you do for a crossover?thanks and enjoy!
Follow Ups:
It is the fe208 sigma and a T900 tweeter.
see my "Gallery" for T900 x-over.
Looks like some great development work on that T900A crossover. What were the final values you used for R1? Overall, what was the goal - smoother roll off, lower crossover point, etc? I have a pair of these, but was thinking to just use a 1uf cap on them, but it seems that that may not be the best choice? Thanks for posting the graphics and any info you can provide re: your thought process on the development of that crossover.thanks
-Ed
I have sent graphs of what happens when you vary the components of network. The way
this network functions is that the .13mh inductor is very small compared to the capacitor.
This causes a gentle peak at the rolloff point which causes the upper dips to smooth out. By
varying the resistor connected to the coil, it allows the rolloff to become more gradual. In
this way you can "go between" a 12dB and 6dB slope allowing you match up with mating woofer. I
have also shown what happens when you vary the other components. You made have to
add an "L pad" to correct level. Do this with resistors, not a potentiometer.
Note this network is only good for an 8" high efficiency type driver in a backload horn.Bill
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