On Sun, 05 Feb 2012 22:49:36 +0000 (GMT), Stuart
wrote:

In article ,
zzzzzzzzzz wrote:
Certainly true. The fourth harmonic would be at what is considered to
be the "limit" (a few can hear significantly higher than 20kHz) of human
hearing. OTOH, the second harmonic of 15kHz is *way* outside the realm
of human hearing and as such doesn't matter at all.

I don't /believe/ any frequency beyond the upper limit of hearing matters
either, unless it gets hetrodyned down, but I would be interested in, and
open to, hard scientific evidence either way.

Heterodyning requires a nonlinear system (i.e. a multiplier). Audio systems
aren't nonlinear, at least by design. ;-)

Needless to say, care would have to be taken in the design of the
headphones used to ensure they could not affect the result.

None are flat and certainly none are flat from 50Hz to over 20kHz.
Earphones have ridiculous resonances, even the professional types.

Which is why I said they would have to be specially designed.

If they *could* be. Indeed, if they could be, someone would have done it.

Using the human ear in this way, as measuring instrument, could have
some quite interesting results though we would have to improve on
current techniques, which require the skull to be opened up for brain
surgery!

I'd like to see some serious double-blind tests on audiophool stuff.
Nothing I'd love more than to see Monster, and its ilk, bankrupt.
"Copper free", my as

As far as cables are concerned, the only thing that matters at audio
frequencies is the resistance, and that is simply measured. Keep it low to
maintain a good damping factor and all will be well.

Agreed. It doesn't take tremendous effort to make it "good enough". 14GA zip
cord is just right. ;-)