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<blockquote data-quote="Haunz" data-source="post: 7170142" data-attributes="member: 576010"><p>You are kidding, right ?</p><p></p><p>As stated drivers using field coils have been done before. The main advantage is that you can get a lot more flux with a field coil then you can with a regular magnet. Also because there are no weight restrictions as with a voice coil a large electromagnet with a high turns ratio can be used, which can develop a large magnetomotive force with a relativley small amount of current.</p><p></p><p>The only disadvantage is that the manufacturing costs are going to be much higher, and the driver would require a seperate power supply... this is why you don't see speakers made like this today...</p></blockquote><p></p>
[QUOTE="Haunz, post: 7170142, member: 576010"] You are kidding, right ? As stated drivers using field coils have been done before. The main advantage is that you can get a lot more flux with a field coil then you can with a regular magnet. Also because there are no weight restrictions as with a voice coil a large electromagnet with a high turns ratio can be used, which can develop a large magnetomotive force with a relativley small amount of current. The only disadvantage is that the manufacturing costs are going to be much higher, and the driver would require a seperate power supply... this is why you don't see speakers made like this today... [/QUOTE]
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