Posted by TC [ 66.97.92.70 ] on August 06, 2004 at 09:27:23:
In Reply to: Terry, could not really understand most of your post...maybe you can clarify? posted by akhilesh on August 05, 2004 at 23:05:44:
>The speaker, to the best of my knowledge becuase of conservation of energy, CANNOT generate any back EMF force on the amplifier. Maybe I am wrong. Please elaborate
==The speaker(load and circuit) does generate it's own electrical (inductance, resistance) signals that are introduced to the output loop of any amplifiers circuit. In low power ANY back EMF significantly affects the pprimary signal. This is usually ignored, but exists nonetheless. Since we are talking high efficiency, we are talking low power regardless of amplifier power.
The reason people biamp triamp whatever is to maintain direct connection to an output circuit to avoid the problems of passive components in a circuit (yes this has been done since amps and spkrs were invented). It always maintains ultimate possible clarity and provides for better control of the spkr. Most of the time this is an effort to increase dyanmic range and power output capability. You can always go passive but it's not -better-.
TC
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