LR Baggs M1 - Manual (Page 6)

and balance of the pickup. Raising the pole pieces will increase
the output of the strings; lowering them will decrease the output.
For the most powerful and articulate sound, we recommend
setting the pole pieces closer to the strings. However, if they
are too close, they will interfere with the strings’ movement and
produce a percussive clacking noise. Lowering the pole pieces will
de-emphasize the strings and emphasize the body sound.
We have provided two additional 3/4” pole pieces for use in the
B and little E string positions with nickel or electric guitar strings,
and one spare 3/8” pole piece for use with acoustic sets that have
an unwound “G” string.
When adjusting the pole pieces downward you will meet additional
resistance when you reach the bottom of the adjustment range.
Do not force the pole pieces any further! This could damage
the pickup permanently.
4.3. Mixing with other sources: The M1 is intended to provide a
complete sound from a single passive pickup. However, you may
still want to pair it with another transducer.
The prewired strapjack harness has stereo output capability. You
can connect the output wire from a mini-mic or another transducer
to the ring terminal of this jack. Then run a stereo cord to the L.R.
Baggs Mixpro or your favorite outboard gear.
The M1 can easily be substituted for other soundhole pickups in
an existing two-source setup. As with all two-pickup setups, you
should experiment with relative phase if possible. The two sources
will often mix much better in one phase than the other.