LR Baggs M1 - Manual (Page 3)

3 . I N S T A L L A T I O N
3.1 Installation overview: There are two ways to install the M1, by
using either of the two provided cables. For permanent installations,
use the strapjack harness. If the guitar doesn’t have a hole in the
tailblock, it will be necessary to drill one in order to use the strapjack.
For temporary or nondestructive installations, use the 10-foot
guitar cable, which is designed to run out of the soundhole
directly into your outboard gear. This is a high-quality cable; using
it will help ensure that the M1 sounds as good as we intended.
The other principal advantage of this installation is that it leaves
the instrument unaltered. For permanent installations, proceed to
the strapjack instructions; for temporary installations, skip to the
pickup installation in section 3.3.
3.2 Strapjack installation: If you plan to do a permanent
installation, be sure to try installing the M1 in the soundhole before
you drill the strapjack hole. The M1 will only fit in a soundhole larger
than 3.5” in diameter. Also, a few guitars have off-center soundholes
that will not allow the pole pieces to be directly under the strings.
If you have one of these, plug in the M1 using the 10-foot cord, and
see how well it works before you alter your guitar.
For proper installation, this jack requires a clean 1/2” hole in the
tail block of the instrument. If the guitar lacks this hole, start by
placing a piece of masking tape on the outside of the instrument
over the drilling area (to avoid chipping the finish), drill a small
pilot hole in the tail block and then follow with a step drill. Now
proceed with the installation.
Remove the strap ring, retaining nut and one washer from the
end of the jack. There should still be one star locking washer, one
flat washer and a nut remaining on the jack. Bring the jack down
through the soundhole into the body and insert it into the pre-
drilled hole in the tail block.