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?
>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.
-Dan Dugan
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