Hi guys,
I need some guidance in my first crossover design.
It seems that the electrical crossover will combine with the natural frequency drop-off of a driver.
I have a tweeter that begins what looks like a -10 dB/octave slope at 1600Hz. I would like to crossover at 2500Hz. Where does the combining effect take place? If I use a 2nd order Xover does the frequency begin to drop-off at a rate of 22 dB/octave immediately at 2500Hz or would this only occur if I crossed over at 1600Hz?
Thanx,
fred p
I need some guidance in my first crossover design.
It seems that the electrical crossover will combine with the natural frequency drop-off of a driver.
I have a tweeter that begins what looks like a -10 dB/octave slope at 1600Hz. I would like to crossover at 2500Hz. Where does the combining effect take place? If I use a 2nd order Xover does the frequency begin to drop-off at a rate of 22 dB/octave immediately at 2500Hz or would this only occur if I crossed over at 1600Hz?
Thanx,
fred p
Hi,
if you crossover over first order at 3Khz, then you have an overdamped 3rd order acoustic alignment.
(ignoring the capacitors interaction with the tweeters resonant impedance peak)
Around 3kHz the alignment is ~ first order, but below 1.5kHz the roll-off is 3rd order.
http://www.zaphaudio.com/ Have a good rummage around this site.
/sreten.
if you crossover over first order at 3Khz, then you have an overdamped 3rd order acoustic alignment.
(ignoring the capacitors interaction with the tweeters resonant impedance peak)
Around 3kHz the alignment is ~ first order, but below 1.5kHz the roll-off is 3rd order.
http://www.zaphaudio.com/ Have a good rummage around this site.
/sreten.
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