I had no improvement in gain when using PIP mics via a battery box to
an Olympus LS10. The signal strength and noise levels were about the
same with or without the battery box.
The one advantage I found though, for a battery box to LS10, was when
using a long lead (25 metres in my case), where I placed the battery
box at the mic end then ran the signal only (not the power) back
through the cable to the recorder. That way I had no crackling if I
happened to move the input plug going into the LS10. Previously when
running power from the LS10 to the mics via a 25 m lead, the input
plug was prone to crackle with the slightest bump.
Vicki
On 13/10/2010, at 11:52 AM, Dan Dugan wrote:
>> Most devices (cheap) that I've seen with PIP have terrible self
>> noise. Even if the device provides PIP, using a battery box can
>> really improve things noise wise.
>
> PIP is a consumer mic powering system, and of course you can find a
> lot of lousy mic preamps around. But don't blame PIP. There have
> always been recorders with excellent PIP preamps around, too.
>
>> From what I've heard a stronger voltage increases the dynamic
>> range and therefor the SNR. Not that I'd want to apply 48V to a
>> 5V device.
>
> Increases the gain some and the headroom a lot. Concert tapers
> (recording in incendiary SPLs) use up to 9V PIP, but I don't know
> if all mics can take that much. Mic headroom isn't very important
> for the levels we encounter in nature recording. For nature a Volt
> or two is sufficient.
>
> -Dan
>
>
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