Gee Whizz. Sorry for not spelling your name correctly in the two posts Tomasz.
That was very careless and rude of me – please accept my apologies. John K From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of Tomasz Kowalczyk Sent: Tuesday, 16 April 2019 20:30 To: neonixie-l Subject: Re: [neonixie-l] OT: audio levels W dniu piątek, 29 marca 2019 08:46:37 UTC+1 użytkownik charles napisał: On 2019-03-28 10:09 p.m., johnk wrote: the FTC in the States started cracking down and said that any power claims had to be based on teh RMS output (.707 of the peak) using a sine wave with Specified distortion. AND that the unit had to be conditioned at almost maximum power (75% if I recall, or Perhaps 90%)for several minutes before taking the measurement. SOME units sudenly could not show ANY power as the pre-conditioning was enough to cause them to shut down or Melt down. That would be 0,707 (1/sqrt(2)) voltage output on a resistive load. RMS power of a sine wave is 0,5 times peak power. I like to know maximum constant RMS output, because it tells me a lot about the amplifier and its capability. The peak power or "music power usually" lacks a definition (I can easily imagine a design that would allow for short pulse of higher power, but power supply/amplifier would fry up if it was to deliver this peak power for longer time). I like that FTC definition requiring amplifier to work with high output power before taking a measurement, which is watts RMS. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7c2c3bfe-e43d-4701-86c9-f9ecb39e735a%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/7c2c3bfe-e43d-4701-86c9-f9ecb39e735a%40googlegroups.com?utm_medium=email&utm_source=footer> . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/001e01d4f47b%241f3f64b0%245dbe2e10%24%40internode.on.net. For more options, visit https://groups.google.com/d/optout.
