EM172 based microphones - PIP voltage?

[inetd_conf]

I'm guessing this has been covered before, but I'm having no luck finding t=
he answer with a Google search or a search here:


 When using EM172 based microphones, what's a good PIP voltage?


 The reason I'm asking is that I finally looked at the datasheet for the BT=
-EM172, in which the Vcc value listed is 5Vdc with a Vcc range of 3-10Vdc.


 When I tested the PIP voltage being supplied by my recorders (DR-05 and a =
DR-70D) they were closer to 2.5-2.8 (I forget the exact numbers). Neither w=
as providing a full 3V, and certainly neither was providing 5V.


 Would I be better off using a battery box that provided a true 5V PIP volt=
age? Or am I making a mountain out of a molehill?


 Thanks,


 Tom