Capacitance - Page 2

Brian Beck · 20th March 2008, 02:38 PM

Yes, the mass of the diaphragm plus the mass of the air on either side (as opposed to the resistance of the air) are part of a resonant system that goes inductive at certain frequencies.

Mike Beck · 17th April 2008, 08:16 PM

The diaphragm may take a small amount of energy to make sound but the majority of work is done by the amplifier charging and discharging the panel capacitance at the audio frequency. This causes two types of losses in the amplifier: switching loss and conduction loss which account for the heat generated by an amp driving an ESL. An ESL is very efficient if you don't include the amplifier loss. Another way to look at it: the amplifier sends current to the ESL but the ESL returns most of it which the amp must dissipate. This is often referred to as circulating current.

20th March 2008, 02:38 PM	#11
Brian Beck diyAudio Member Join Date: Dec 2004 Location: South Florida, USA	Yes, the mass of the diaphragm plus the mass of the air on either side (as opposed to the resistance of the air) are part of a resonant system that goes inductive at certain frequencies. __________________ Brian

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17th April 2008, 08:16 PM	#12
Mike Beck diyAudio Member Join Date: Aug 2005 Location: North Carolina	The diaphragm may take a small amount of energy to make sound but the majority of work is done by the amplifier charging and discharging the panel capacitance at the audio frequency. This causes two types of losses in the amplifier: switching loss and conduction loss which account for the heat generated by an amp driving an ESL. An ESL is very efficient if you don't include the amplifier loss. Another way to look at it: the amplifier sends current to the ESL but the ESL returns most of it which the amp must dissipate. This is often referred to as circulating current.