On Sat, 07 Aug 2004 09:29:42 +0100, "Dave Plowman (News)"
wrote:

In article ,
Stewart Pinkerton wrote:

You can easily tell differences among video
cables, but no one has *ever* been able to prove an ability to *hear*
differences among cables.

I thinks you've left out 'adequately specced cables'. Some old valve
equipment had high output impedance, and using some interconnects could
result in a treble loss. You can also get effects with some types of
pickup cartridges.

To actually get treble loss from an interconnect, its characteristic
impedance must be lower than the terminating impedances. Most
(excluding woven Goertz) speaker cable has a characteristic impedance
in the 70 to 100 ohm range, and can't possible cause such an effect.
Of course you may reduce the treble *lift* inherent in such cables.

Of course at lower audio frequencies the impedance deviates markedly
from that value by virtue of resistive terms becoming dominant, but
the change is still higher, rather than lower impedance, so the top
cut still can't happen.

d

Pearce Consulting
http://www.pearce.uk.com