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ONBOARD ACOUSTIC GUITAR PREAMP
WARNING
INSTALLATION BY A QUALIFIED PROFESSIONAL REPAIRMAN IS STRONGLY
RECOMMENDED. FISHMAN TRANSDUCERS WILL NOT BE RESPONSIBLE FOR ANY
DAMAGES TO YOUR INSTRUMENT DUE TO IMPROPER INSTALLATION.
2. TEMPLATE
A drilling template is provided for drilling the control shaft holes. Cut out the
template outline. Check that it fits between the upper and lower linings
when held inside the guitar at the chosen location. Tape the template at the
location on the outside of the guitar. With a sharp scribe, pierce the tem-
plate at the marks. Remove the template. This should provide you with two
drilling centers marked on the side of the guitar. These centers will be
1.250 inch (31.8mm) apart. At each center, drill a .375 inch (9.5mm) hole
through the side of the guitar. We recommend using a sharp 3/8 inch spur
bit for this operation.
FIG. 1
3. SPACER BLOCK
We strongly advise that a
wooden spacer block (see
Figure 1) be used to add
strength to the mounting area
of the guitar and to more evenly
distribute the load of the pre-
amp. We do not recommend
using a hex nut and lock washer as the inside bearing surface to accommo-
date the thickness of the inside of your instrument because this could result
in possible damage to the instrument itself
4. PREPARING THE SPACER
Using the drilling template as a guide, make a rectangular wooden spacer
that is 2.00 inch x .750 inch x T (50.8mm x 19.0mm x T). T is the measure-
ment derived from the protruding bushing length minus the outside hard-
ware thickness (Figure 1) To derive T, insert the control shafts through the
3
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