I would like to make 12db per oct xovers (passive line level) according to this website. I'm having trouble picking starting values. Could someone help me make sense of this?
http://www.t-linespeakers.org/tech/filters/passiveHLxo.html
This is for a car system and I need a xover for about 3.1 khz.
My Head Unit boasts a pre-out of 4v/100k ohm (Pioneer deh-p7500mp)
My amp (aura 2300) claims an input impedance of 14k.
do I just arbitrarily pick a starting value or are these numbers relevant?
Thanks
http://www.t-linespeakers.org/tech/filters/passiveHLxo.html
This is for a car system and I need a xover for about 3.1 khz.
My Head Unit boasts a pre-out of 4v/100k ohm (Pioneer deh-p7500mp)
My amp (aura 2300) claims an input impedance of 14k.
do I just arbitrarily pick a starting value or are these numbers relevant?
Thanks
Preacher said:My Head Unit boasts a pre-out of 4v/100k ohm (Pioneer deh-p7500mp)
Obviously your pre-out impedance should read 100 ohm instead of your stated 100k ohm. If that is true, you might start with 0,5-1kOhm for R1.
Thank you for the help; That makes sense to me. I didn't expect to see that impedance from my amp.
If I want a xover freq of 3.1 khz for the lowpass I came up with
c1= 3.42 uf
c2= .342 uf
I'm guessing that anything between 2 and 5 volts would be acceptable voltage for the caps. Would I use standard audio crossover capacitors (non-polar)?
If I'm missing something in my values please let me know. How close will this get me to the target frequency? Are these pretty accurate crossovers?
Geoff
If I want a xover freq of 3.1 khz for the lowpass I came up with
c1= 3.42 uf
c2= .342 uf
I'm guessing that anything between 2 and 5 volts would be acceptable voltage for the caps. Would I use standard audio crossover capacitors (non-polar)?
If I'm missing something in my values please let me know. How close will this get me to the target frequency? Are these pretty accurate crossovers?
Geoff
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