The line-in port supplies 2.5 volts to a powered microphone, so you won't
have as much headroom as you would with a dedicated preamplifier which
traditionally supplies 9 volts.

-----Original Message-----
From: rockbox-bounces_at_cool.haxx.se [mailto:rockbox-bounces_at_cool.haxx.se] On
Behalf Of Grant Hardy
Sent: Saturday, October 14, 2006 5:29 PM
To: 'Rockbox'
Subject: RE: question about the iriver h 340 line in connector

> Hi, no, they do not need. If you use, it will be okay as well, but you
> don't need it.
Really? How much "plug-in power" is provided via the line in port? I
believe I detected a noticeable difference between using a battery box or
not using one.

Grant

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