Crossovers & LPads

Haggar · 4th December 2004, 09:48 AM

Just a clarification on crossover design. I understand how LPads don't change the crossover frequency with crossover networks, but if you don't use a LPad and just put a resistor in series with the speaker, does this resistence need to be included in the crossover calculation ? EG. If F = 1/(2Pi c R) and the speaker impedance is 8 ohms, and a 4 ohm resister is placed in series, should R = 8 + 4 ?

thanks guys

johninCR · 4th December 2004, 01:42 PM

Before the XO, no. Between the XO and driver, yes.

Bill Fitzpatrick · 4th December 2004, 03:37 PM

Unless it's a first order network as you described. In that case is doesn't matter where the resistor is placed in series.

4th December 2004, 09:48 AM	#1
Haggar diyAudio Member Join Date: Nov 2004 Location: Australia - Brisbane	Crossovers & LPads Just a clarification on crossover design. I understand how LPads don't change the crossover frequency with crossover networks, but if you don't use a LPad and just put a resistor in series with the speaker, does this resistence need to be included in the crossover calculation ? EG. If F = 1/(2Pi c R) and the speaker impedance is 8 ohms, and a 4 ohm resister is placed in series, should R = 8 + 4 ? thanks guys

4th December 2004, 01:42 PM	#2
johninCR diyAudio Member Join Date: Apr 2004 Location: Costa Rica	Before the XO, no. Between the XO and driver, yes. __________________ Everyone has a photographic memory. It's just that most are out of film.

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4th December 2004, 03:37 PM	#3
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	Unless it's a first order network as you described. In that case is doesn't matter where the resistor is placed in series.

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