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In Reply to: RE: Quad ESL 63 Vs. 2805 Impedance Peak posted by Roger Gustavsson on April 22, 2024 at 01:50:15:
Oops - copied the 2nd link twice. Fixed.
I knew the size of the peak was level-dependent but not its location; Stereophile: "...unusually, the *height* of this peak will depend on the drive level; the impedance in this region increases with increasing level."
The location of the peak being level-dependent also seems odd given this statement: "The peak in the bass is related to the diaphragm's fundamental "drumskin" resonance..."
The resonance freq should not change with level, yes?
Despite all that, you must be right - it must be a matter of varying levels.
So, apparently, S-phile used very different levels in measuring impedance in the two speakers. The 63 review specifies a level of 10mV; the 2805 doesn't specify it.
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Follow Ups
- RE: Quad ESL 63 Vs. 2805 Impedance Peak - PaulF70 10:36:41 04/22/24 (1)
- RE: Quad ESL 63 Vs. 2805 Impedance Peak - Volker 22:42:38 05/05/24 (0)
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