Not sure if this the right forum to post.
Just a question about the impendence peak at a given crossover point. There is inevitable impendance peak induced at the crossover point, how does this effect the the sound/tonal balance of a system.
I'm modeling with two crossover ideas for my woofer. In theory atm
the first, using a smaller coil+cap and notch filters to attack baffle diffraction issues, which yeilds a much lower impendance peak, at the XO point, plus a small ones there.
the second, using a large coil+cap combination to attack the problem and gives me the required slope. Yeilds a much larger impendance peak though, also shifted below(Hz) the XO point
Both modeled slopes are very, very same, apart from a small 1 db gain at 1200Hz on one method.
As the question is gonna be, what tonal difference will i see between the two, and what other effects does a smaller peak have up against the larger peak. Actually does it even have any effect at all, if any, it doesn't appear to have any through these simulations. but something tells me it would. Any light shed would be helpful.
Just a question about the impendence peak at a given crossover point. There is inevitable impendance peak induced at the crossover point, how does this effect the the sound/tonal balance of a system.
I'm modeling with two crossover ideas for my woofer. In theory atm
the first, using a smaller coil+cap and notch filters to attack baffle diffraction issues, which yeilds a much lower impendance peak, at the XO point, plus a small ones there.
the second, using a large coil+cap combination to attack the problem and gives me the required slope. Yeilds a much larger impendance peak though, also shifted below(Hz) the XO point
Both modeled slopes are very, very same, apart from a small 1 db gain at 1200Hz on one method.
As the question is gonna be, what tonal difference will i see between the two, and what other effects does a smaller peak have up against the larger peak. Actually does it even have any effect at all, if any, it doesn't appear to have any through these simulations. but something tells me it would. Any light shed would be helpful.
How much affect will a function of your amplifier. If it is a good voltage source (low output impedance) frequency response anomalies will be minimal. More subtle will be how your amplifier reacts to the reactive parts of the load in dynamic conditions.
dave
dave
cheers for that planet10, it went straight over my head though. In alot of respects i'm still new to this, even though i've built a handfull of speakers in the last 10 years (all proven designs), some of the theory has evaded me.
So in short NO, if i have good stable amplifier?
a cheaper amplifier may lose the plot abit under some stress?
So in short NO, if i have good stable amplifier?
a cheaper amplifier may lose the plot abit under some stress?
A stable amplifier with a low output impedance. This does not guarantee that it is a good amplifier sonically.
Amplifiers are secified into an 8 ohm resistive load. A good designer will make sure that his amplifier maintains capability into what he considers a good range of target load. Often when a good job is done of this the (in many ways meaningless) specifiations slip.
The amount an amplifier costs is not directly correlated.
Also, if one has a speaker with large deviations in impedance, it does limit you to amps with low output impedance (unless impedance variations are complementary to FR), and there are some pretty stunning examples of those.
A good rule of thumb is to try to keep impedance as flat as is reasonable and phase as close to zero as you can (easiest with no passive XOs)
dave
Amplifiers are secified into an 8 ohm resistive load. A good designer will make sure that his amplifier maintains capability into what he considers a good range of target load. Often when a good job is done of this the (in many ways meaningless) specifiations slip.
The amount an amplifier costs is not directly correlated.
Also, if one has a speaker with large deviations in impedance, it does limit you to amps with low output impedance (unless impedance variations are complementary to FR), and there are some pretty stunning examples of those.
A good rule of thumb is to try to keep impedance as flat as is reasonable and phase as close to zero as you can (easiest with no passive XOs)
dave
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