This is right along with what's been said, although I was a little surprised at the reasoning behind the input pads..
The V3 does have input pad jumpers which attenuate the input by 20dB.
The reason for this was to allow the V3 to be used as stand alone AD
converter that could handle a +4dBu signal from a professional device
like a sound board feed. It would seem quite silly to me to use it in
this fashion with another mic preamp as you would be using redundant
circuitry. ...Unless, of course, one desired the sonic imprint of
another mic preamp.
I hope this answers your question.
Sincerely,
Michael