Re: unbalanced inputs to the 722

["Dan Dugan" dandugan_1999]

Derek Holzer, you wrote:

>OK, just tested my mics on a friend's 744 and heard the same thing. It's
>hard to hear over background noise, but it's present. Since it happens
>with two very diferent mics on two different SD devices, it leads me to
>believe that it's inherent in the design of the SD preamps. They just
>don't like unbalanced and/or high impedance input. So I ask again, have
>people noticed this and if so how have they dealt with it. I chose to
>use two DI boxes, but this is a large, clunky solution in the field.

I suspect it's the high source impedance. A proper preamp for a
high-Z source is quite a different animal--the grid of a vacuum tube
is ideal!

-Dan Dugan