optimal input source for sampler

[amble]

The record input impedance of my old mpc60 sampler is listed at 45k
ohm. what would be the optimal input source? line? mic? hi-z?
something else?

[Roy W. Rising]

"amble" > wrote:
> The record input impedance of my old mpc60 sampler is listed at 45k
> ohm. what would be the optimal input source? line? mic? hi-z?
> something else?

A 45K ohm input *impedance* suggests "hi-Z line level" as a *voltage*
(about -10 dBu). However, it might be hi-Z mic (about -60 dBu). Almost
certainly it would be overloaded by 600 ohm line level (+4 dBu) but an
inline attenuator could fix this. A lo-Z to hi-Z adaptor increases the
voltage, so that's not likely to be the answer, UNLESS it's a hi-Z mic
input and you're using a lo-Z mic.

--
~ Roy
"It's NOT the mic, it's NOT the preamp!"

[amble]

Thanks i should add that the input is switchable between -65 -45 and
-27dbm settings.


Roy W. Rising wrote:
> "amble" > wrote:
> > The record input impedance of my old mpc60 sampler is listed at 45k
> > ohm. what would be the optimal input source? line? mic? hi-z?
> > something else?
>
> A 45K ohm input *impedance* suggests "hi-Z line level" as a *voltage*
> (about -10 dBu). However, it might be hi-Z mic (about -60 dBu). Almost
> certainly it would be overloaded by 600 ohm line level (+4 dBu) but an
> inline attenuator could fix this. A lo-Z to hi-Z adaptor increases the
> voltage, so that's not likely to be the answer, UNLESS it's a hi-Z mic
> input and you're using a lo-Z mic.
>
> --
> ~ Roy
> "It's NOT the mic, it's NOT the preamp!"

[Roy W. Rising]

"amble" > wrote:
> Thanks i should add that the input is switchable between -65 -45 and
> -27dbm settings.
>
> Roy W. Rising wrote:
> > "amble" > wrote:
> > > The record input impedance of my old mpc60 sampler is listed at 45k
> > > ohm. what would be the optimal input source? line? mic? hi-z?
> > > something else?
> >
> > A 45K ohm input *impedance* suggests "hi-Z line level" as a *voltage*
> > (about -10 dBu). However, it might be hi-Z mic (about -60 dBu).
> > Almost certainly it would be overloaded by 600 ohm line level (+4 dBu)
> > but an inline attenuator could fix this. A lo-Z to hi-Z adaptor
> > increases the voltage, so that's not likely to be the answer, UNLESS
> > it's a hi-Z mic input and you're using a lo-Z mic.
> >
It appears you have your answer ... hi-Z mic. With that much gain range,
you could try a lo-Z mic without the adaptor.

--
~ Roy
"It's NOT the mic, it's NOT the preamp!"

[amble]

cool, thanks for your response.


Roy W. Rising wrote:
> "amble" > wrote:
> > Thanks i should add that the input is switchable between -65 -45 and
> > -27dbm settings.
> >
> > Roy W. Rising wrote:
> > > "amble" > wrote:
> > > > The record input impedance of my old mpc60 sampler is listed at 45k
> > > > ohm. what would be the optimal input source? line? mic? hi-z?
> > > > something else?
> > >
> > > A 45K ohm input *impedance* suggests "hi-Z line level" as a *voltage*
> > > (about -10 dBu). However, it might be hi-Z mic (about -60 dBu).
> > > Almost certainly it would be overloaded by 600 ohm line level (+4 dBu)
> > > but an inline attenuator could fix this. A lo-Z to hi-Z adaptor
> > > increases the voltage, so that's not likely to be the answer, UNLESS
> > > it's a hi-Z mic input and you're using a lo-Z mic.
> > >
> It appears you have your answer ... hi-Z mic. With that much gain range,
> you could try a lo-Z mic without the adaptor.
>
> --
> ~ Roy
> "It's NOT the mic, it's NOT the preamp!"