>
> wondering if it'd be possible to swap out a resistor or something
> on the 183-3 to change the range from 1-4x loudness to 1-8x, 16 etc
>
> i am trying to use it to raise a line level signal
> from my audio interface output (edirol fa-101)
> to a usable level within my a-100 system

Just a guess, apologies if you are certain you've ruled this out.

I would think many people would complain if that particular interface
had super low output signals. I remember earlier on with my digital
recordings I was just glad to see the amplitude bar moving and not so
concerned that I was getting near the max (without clipping of
course). Now if your digital signal going to the interface is pretty
low to begin with, adding gain at the analog out won't make it up
properly since you are also boosting all the digital artifacts making
them more audible. 24-bit mode helps reduce that aspect, but you do
want to get the strongest possible non-distorting levels at all
points through the signal chain rather than a big boost at the end if
possible.