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8
6-2. Rotate and tighten the mounting tab axis screws (4 places) on the unit clockwise to their full stop in
order to grip the ceiling panel with the mounting tabs.
Step 7. Set the input power.
Turn the input selector switch (on the unit's front) to set
it to the desired input impedance.
(Factory-preset to 170 Ω.)
Important
Never set this switch to low-impedance (8 Ω or 16 Ω)
settings when using a high-impedance 25, 70, or 100 V
line. Failure to follow this instruction could result in
damage to the speaker or amplifier.
Step 8. Attach the front grille.
Align the tabs (4 places) on the back side of the
grille with the corresponding notches in the unit,
then rotate the grille to full stop in the direction
indicated by the "LOCK" arrow.
Tip
The front grille employs a double-locking system
that clicks into place once partway through
rotation, but only locks into position at its point of
full rotation. Always be sure to rotate the grille to
its full stop.
Mounting tab axis screw
Mounting tab
Use an electric screwdriver to tighten.
(Tightening torque: 6 – 10 kgf·cm)
Front grille (accessory)
Tab (4 places)
Notch
(4 places)
Speaker
unit
LOCK