I read on the wiki that it is best to use the impedence of a speaker at its xover frequency not its nominal impedance.. so in the case of the Audax ap17ozo its nominal imp is 6 ohms... its impedence at the crossover frequency I'd like to use 3000hz is 11.6 ohms... I will use it in a 3 way setup and that would be the high crossover.. now my question is if I put in a zobel network to control the impendence at high freq... and if I calc correctly.. Rz is 1.25 x Rnom = 8 ohms.. and the cap is Le/Rzsquared = 11.6 uf.. will this effect the speaker impendence at 3000hz?? in effect knocking down the 11.6 ohms impedence with the zobel network installed... that is what it is for.. right???
Bud
Bud
The purpose of an ideal zobel network is to exactly cancel the inductance.
The ideal zobel resistor value is the DC resistance of the driver.
Consequently the impedance of an ideally Zobelled driver is its DC resistance.
A non-ideal zobel network can be used to reduce the variation of impedance.
🙂 /sreten.
The ideal zobel resistor value is the DC resistance of the driver.
Consequently the impedance of an ideally Zobelled driver is its DC resistance.
A non-ideal zobel network can be used to reduce the variation of impedance.
🙂 /sreten.
streten
Thank you for the reply... so are you saying I shouldn't design the xover to the 11.6 ohm value which is the impendance of the audax at 3000hz... but to the 6 ohm impendance with the zobel circuit compensating for the inductance...
Thanks
Bud
Thank you for the reply... so are you saying I shouldn't design the xover to the 11.6 ohm value which is the impendance of the audax at 3000hz... but to the 6 ohm impendance with the zobel circuit compensating for the inductance...
Thanks
Bud
Midrange is SEAS MCA15RCY, tweeter is Monacor DT-254. Crossover frequencies are 500Hz, 4Khz pure 2nd order filters in this 3-way speaker.
I used for Zobel at the midrange 1,5ohm+10uF because people and speaker designers mostly used these values. Somebody used 1,8 ohm+9,2uF other used 1,2ohm+8,2uF or 1,5ohm+12uF.
But according to an online calculator need 7,2ohm+14uF.
My question why people not used values according to the suggested calculation? Other question with my values I cannot damage the midrange or the amplifier? Am I safety?
What exactly the R and C influence? Is it really better to keep the suggested values or not?
Thank you.
I used for Zobel at the midrange 1,5ohm+10uF because people and speaker designers mostly used these values. Somebody used 1,8 ohm+9,2uF other used 1,2ohm+8,2uF or 1,5ohm+12uF.
But according to an online calculator need 7,2ohm+14uF.
My question why people not used values according to the suggested calculation? Other question with my values I cannot damage the midrange or the amplifier? Am I safety?
What exactly the R and C influence? Is it really better to keep the suggested values or not?
Thank you.