Julf wrote: > Again, the "9th harmonic" is a totally arbitrary limit that results in a > *visually* nice square wave. For *sound*, what matters is *audible* > harmonics. There is no point in feeding the amp frequencies above 20 kHz > or so.
Hi Julf! Well, I have to agree that there is no point. If you can believe the specs, my amp is -0.5dB at 200,000Hz, my tweeters -6dB at 40,000Hz & my 62 year old ears are hanging in there, maybe SOMETHING (i.e. -?dB) at 15,000Hz at best (although I did catch the top tone on a sweep test the other week which surprised me - it came immediately after a spoken intro so it was definitely the highest one (& a very thin "whistle") but I don't know exactly what frequency it was. Anyway, I'm sure that I've NEVER been able to hear above 20,000Hz even as a teenager before bit started falling off. I was however under the impression that some amplifiers don't like ultrasonic frequencies & that sticking them in can induce non-linearity audible as IM distortion. Is this not correct? Dave :) ------------------------------------------------------------------------ Golden Earring's Profile: http://forums.slimdevices.com/member.php?userid=66646 View this thread: http://forums.slimdevices.com/showthread.php?t=106519 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
