--- In Dan Dugan <> wrote:
>
> Ken Durling, you wrote,
>
> >This year I'm trying a new approach, still with a laptop, involving
> >Shure WL-183 (lavalier omnis) which unaltered connect through a belt
> >pack pre with a 9V battery.
>
> I'm assuming you have the Shure MX1BP preamps. I have a pair of
> those. On my first test I thought they added some noise, on a second
> examination they didn't. I was wrong once, but which time?
Yep, them's the ones. I''m voting for the second time. :-)
>
> >An XLR cable runs from the belt pack to
> >my US-122, which is the USB to the laptop. My question is this: both
> >the belt pack and the US-122 contain preamps - I haven't noticed any
> >problems but is there anything to watch out for having two pres in the
> >line? Do they just add up?
>
> The gains do add. I expect the noise of the first preamp (MX1BP) will
> be the critical one, and as long as it's quieter than the mic's own
> noise (which I think it is...I think) that's ok.
>
> >If so, I imagine gain and noise might
> >both increase together? Would I be better of to remove the batteries
> >and just use the US-122s phantom power?
>
> Doesn't make any difference whether the battery is in there or not
> when phantom power is supplied, that is what it uses.
Right, for phantom power, but I was thinking that removing the 9V
from the MX1BP would also remove that preamp from the circuit, forcing
it to use only the pres in the US-122. Could that not concievably
result in a reduction of noise?
Ken
P.S. - I'm planning to come by Saturday night, if it's still on.
What, if anything, of all this would be helpful for me to bring? I
could bring anything from the whole rig, to just some sample
recordings to nothing but a notepad.
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