Hi, everybody
I'm confusing about a zobel network. I know what the zobel network is. It is used to correct an impedance of the speaker but I don't know "When to use it ?" I mean, How is the sound likes as the zobel should be added ?
Thank you
I'm confusing about a zobel network. I know what the zobel network is. It is used to correct an impedance of the speaker but I don't know "When to use it ?" I mean, How is the sound likes as the zobel should be added ?
Thank you
Zobel is not a must have and what it does to sound you
can check easily while measuring. Not only it's supposed
to vary impedance, it does the same to FR. You can get
away with or without it.
can check easily while measuring. Not only it's supposed
to vary impedance, it does the same to FR. You can get
away with or without it.
IMHO, the Zobel was needed in the past because with a flattened impedance the crossover could be easily calculated. This is not true anymore, because you can design the crossover with software that take into account the real impedance of the drivers. Look at reputable designs, you will hard pressed to find a Zobel, if you even find one.
Ralf
Ralf
Seems like everybody tried to tell me a zobel doesn't help in sound but in crossover design.
So, If I have a speaker that doesn't have any filter or network (that's mean it's directly connected to the amplifier) and then added a zobel network onto it.
Is there anything different in sound happened ?
So, If I have a speaker that doesn't have any filter or network (that's mean it's directly connected to the amplifier) and then added a zobel network onto it.
Is there anything different in sound happened ?
If you have a driver that doesn't need a crossover (very unlikely, but there are a few), why do you want to add a Zobel?
I don't have the tools at hand so cannot check, but I suspect that adding a Zobel will slightly alter the FR, thus altering the sonic.
Ralf
I don't have the tools at hand so cannot check, but I suspect that adding a Zobel will slightly alter the FR, thus altering the sonic.
Ralf
Zobel network is needed to correct some instabilities of the amplifier, because of (imprevisible) phase variations caused by wires or/and crossovers, drivers, etc. Problems are occuring at high fréquencies (10 Mhz or so...), and cause some sound harshness. This can vary from case to case, from time to time. No general rule exist. Usual values are 10 ohms and 0.1 µF in series.
Zobel network is like an insurance, one use it, hoping that it is useless !
Zobel network is like an insurance, one use it, hoping that it is useless !
I can be wrong, but this kind of Zobel is usually implemented in the amplifier. My TDA7240 amp has a 2R2 + 0.10uF Zobel, and this is mandatory to prevent oscillation.
Ralf
Ralf
Unless it is a funny valve amp with high output impedance then there will be no change in sound.
That is correct, Boucherot cell is another name for this kind of network.
Very impressive sounding! I'm going to use it from now on. Now it's back to my padded Boucherot cell.
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