arnyk wrote: > What's practical? ;-) > > Square waves contain only odd harmonics, so the 9th order harmonic is > only the 4th actual harmonic. > > Rule of thumb is that square waves require handling up to the 9th order > harmonic, to even start looking much like a square wave. > > I consider square to be a fairly useless test because if you get a > funny-looking square wave, you can't tell that much about how the UUT is > misbehaving. It is quasi-interesting with tubed power amps because they > as a rule, are fairly poor performers. Since the days of SS power amps, > the performance is generally good enough that most people who tested > audio gear moved on.
Morning Arny! Obviously what is practical would depend on what you were actually trying to do: I just lifted the 9th order harmonic bit from the textbook I'm reading. Unless Pathos are spoofing about the frequency response of my amp (like you reckon they were with their quoted power figures), I presume the tubes are in a very linear mode of operation since they are only in the pre-amp stage. It would be of some significance should I ever find a 32bit/384kHz PCM recording that my DAC is supposed to accept (via USB 2.0) because the brick-wall filtering ought then not to occur until 192kHz. Whether the aluminium dome tweeters in my 805S's would emit unexpected audible artifacts is a total unknown... 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
