[TenTec] Headphone clicks

[Paul Christensen, Esq.]

> > Add a 100 ohm resistor in the headphone plug in series with the common
> > headphone ground.  This will desensitize the headphones enough to allow
you
> > to run a higher audio gain and drown out the click.
>
> And destroy headphones frequency response,
> if one cared for it. Headphones and speakers
> have to be driven by low impedance source in
> order to proveide the specified frequency
> response.

Not true.

It is true that the loudness level from the headphone element can be
adversely affected since current into the headphone element is
resistance-limited with the inclusion of the method above.  And accordingly,
an increase in source Z, as a result of the added resistive component will
decrease the source's low frequency  damping factor (i.e., df=Load Z/Source
Z) and may adversely affect the element's *transient response*, but NOT the
frequency response.

The frequency response provided by the headphone element as a result of the
additional source resistance may actually *improve* (at the expense of
loudness), owing to the increase in load Z that the low-source impedance
sees.  This is especially true of capacitor-coupled amplifier outputs.

-Paul, W9AC