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Technical and scientific discussion of amps, cables and other topics.

I may be confused about things in general, but I'm not confusing measurements and specs

Measurements will exceed the published specs for two-channel audiophile amps -- sometimes by a lot (NAD products), unless a shady manufacturer is lying.

Measurments are also done with resistors which only represent speakers whose minimum impedance never goes much below 8 ohms (My EPOS ES11 speakers are a rare example -- impedance never below 7ohms at any frequency). Using resistors may be good for measurement consistency among brands, but the numbers may not apply to the speakers actually attached to the amplifier.

Many measurements such as amp headroom may not be included among the manufacturers published specifications.

My first stereo was in 1966 with an early transistor amp and inefficient Rat Shack Minimus (the originals) speakers -- those were the days of pure baloney amp specs! We have resonable specs today and two-channel amps sometimes produce much more power than specs suggest at low distortion ... and then another +2dB to +3dB output at out-of-spec distortion levels.
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Richard BassNut Greene
Subjective Audiophile 2007


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  • I may be confused about things in general, but I'm not confusing measurements and specs - Richard BassNut Greene 09/21/0714:16:57 09/21/07 (0)

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