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Original Message

RE: Free chart for all of you

Posted by psn on January 11, 2022 at 08:58:34:

6bq5,

1: speakers and room interaction

Paul Klipsch would write technical papers and use the anechoic figures for sensitivity, but use the adjusted indoor room gain figures for consumer specs and advertising. Someone eventually criticized him using these latter figures, claiming they were improper or misleading.

Paul's response was to look into it and agree! He noticed that the old standard of measuring sensitivity at four feet had been changed and made metric by the general industry, changing that distance to one meter (just a bit over three feet)... so he remeasured and corrected the Heritage figures. This was the change from 104 to 105dB/W/m. :)

2: what are you listening to

Yes, critical listening, records only, La Scala speakers, I alternate between two amps, 48 year old Sansui and a 2A3 SET.

merdy,

Nice chart! In particular to my question, I find this part confusing:

"RMS Watts = Amps x Amps x Ohms = True Power"

"Peak Watts = Volts x Amps = Apparent Power"

My calculations show these two are equal. I also find technical people writing that RMS is appropriate for voltage and current, but not for watts...