Fishman AURA ACOUSTIC IMAGING PEDAL User Manual page 8

Choose your pedal (continued)
Use with all medium-depth classical
and thin-body acoustic-electric
nylon-string guitars. Note: Use only
an undersaddle pickup with the
Nylon pedal.
These are typically jumbo or
dreadnought size instruments.
The heavier bracing for 1 string
guitars creates a unique sound and
has its own Aura Imaging Pedal.