Thanks for all the replies so quickly. I have a mic (CAD Equitek E100)
set at the grill of my accordion, and my stage amp is a guitar amp.

Right now I'm running into a small Mackie 12 channel mixer, and from
that I send the main signal from the mixer to the snake, and an aux
send to my stage amp. I have no problems with feedback using this mic
with this setup, it's very one-directional and I have mounted very
close to the grill of my accordion.

I like this setup, for b/c it gives me a signal boost through the
boards mic pre, an xlr send to the snake, and a split to my amp with
the aux. However, it's very clunky and a lot to carry around for one
line. I thought their might be a more portable solution, but now that
I break it down more I guess the DI would not boost the signal at all
like the Mackie's pre's.

Suggestions?

-Rick