--- In Klas Strandberg
<> wrote:
>
> Interesting that they try to explain something, but I have never
seen a mic
> amp with the kind of adjustable "level-control" which they say is
common.
>
> Yes, at line levels, perhaps, - or a -20db attenuation, yes, but
not a
> "level control" for microphone level. Have never seen it and I
think every
> ordinary designer would shake his head.
>
Klas,
it's called marketing...after all, how many prospective
purchasers know that it is not common.
an unsuspecting buyer might assume that all others
are of inferior quality, at least that seems to be the intent
of those who market in this manner.
to be fair, however, it is perhaps not normally the
designer who promotes in this manner, and it is perhaps
more typical outside your country. In the US, it is quite
normal to stretch the truth, and to put your product in
the best light possible.
I much prefer to give my business to straight-shooters,
and I am even willing to pay a premium, if necessary.
cheers,
clay
> Besides, if such an attenuation was possible they are wrong. Many
preamps
> generates the minimum
> noise at max gain. In such a case, it is best to run the amp at
max gain
> and adjust the incoming level, to avoid distortion.
>
> If you make a good preamp today, the gain level control comes with
the
> design. The only thing that differs a HQ from others is that a HQ
has a
> rotating switch for gain (like 20db steps) instead of a step-less
> potentiometer. And it is 20 db between the steps, not 18,63.... or
> something which you get from using standard resistor values.
>
> But I am surprised that I have never seen these unbalanced preamps
before!
> The need for them has been for long.
>
> The only remaining question is the noise level. As I have said, it
is not
> difficult to design a low-noise mic amp, but.... for some reason
they exist. ?
>
> Klas.
>
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