Hi all,
I’m using diy F1J’s to drive midrange and tweeter compression drivers in a 4 way active setup. As the amplifiers are considered as current sources, the normal voltage source xo formulas does not apply. The midrange has a XO freq of 500 Hz, and the tweeter 2.8kHz. Anyone know how to calculate series capacitor values slightly below those two frequencies?
I’m using diy F1J’s to drive midrange and tweeter compression drivers in a 4 way active setup. As the amplifiers are considered as current sources, the normal voltage source xo formulas does not apply. The midrange has a XO freq of 500 Hz, and the tweeter 2.8kHz. Anyone know how to calculate series capacitor values slightly below those two frequencies?
Thank you. I’ve read the article about crossovers. An ideal current source has infinite output impedance - the F1 has 80 ohms, but still much higher than the load impedance. From the article we learn that capacitors become inductors and vice versa when we deal with current sources. Should I put an inductor in series with the loudspeaker to protect the driver from DC?
You would put an inductor in parallel with the driver.
There is another article on FIRST WATT which discusses the
crossovers in more detail.
http://www.firstwatt.com/pdf/art_cs_xvrs.pdf
There is another article on FIRST WATT which discusses the
crossovers in more detail.
http://www.firstwatt.com/pdf/art_cs_xvrs.pdf
Thank you mr. Pass, I really appreciate your clarification. Having worked with only voltage sources previously, putting only an inductor in parallel with the driver initially sounds crazy, but I guess that’s what you mean by thinking inside-out working with a current source🙂
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