Hello!
I'm looking into a driver with multiple concentric rings of voice coils in a field coil arrangement.
As you get into multiple layers, do issues come up with the frequencies driving the coils starting to go out of time and dampen each other?
I would think it would be something that would need to be tested, as the closest thing that I can think of off the top of my head is dual coil woofers, etc. like the ones you see in the old infinity q series
I'm looking into a driver with multiple concentric rings of voice coils in a field coil arrangement.
As you get into multiple layers, do issues come up with the frequencies driving the coils starting to go out of time and dampen each other?
I would think it would be something that would need to be tested, as the closest thing that I can think of off the top of my head is dual coil woofers, etc. like the ones you see in the old infinity q series
there was a pretty interesting woofer some years back with opposing voice coils and motors
http://www.codrive.com/tech.htm
not exactly what you thinking but interesting
http://www.codrive.com/tech.htm
not exactly what you thinking but interesting
thats rather clever, isn't it?!
Funnily enough I had been thinking last night about a sort of dynamic damping by using the audio signal on a secondary coil, only significantly smaller, and with reversed signals going through the coils, causing a slight "tug" on the driver in direct oppposition to its excursion. Doing so could theoretically increase power handling, which becomes a limiting factor when trying to make a large compression driver diaphragm.
Ideally to be able to produce anything even resembling a low freq. driver, its going to be as much surface area as you can get away with, while having uniform (stiff) movement, and low as possible excursion.
Its sort of like the speaker building law... high efficiency, low bass, or small cabs ; you can only pick two.
Funnily enough I had been thinking last night about a sort of dynamic damping by using the audio signal on a secondary coil, only significantly smaller, and with reversed signals going through the coils, causing a slight "tug" on the driver in direct oppposition to its excursion. Doing so could theoretically increase power handling, which becomes a limiting factor when trying to make a large compression driver diaphragm.
Ideally to be able to produce anything even resembling a low freq. driver, its going to be as much surface area as you can get away with, while having uniform (stiff) movement, and low as possible excursion.
Its sort of like the speaker building law... high efficiency, low bass, or small cabs ; you can only pick two.