Mechanical Adjustments - Electro-Voice FRi+ 181S User Manual

Appendix A: Mechanical Adjustments
F R i
S P E A K E R
S Y S T E M S
Rotatable Horn Information
All FRi-Series full-range speakers come with a high-
frequency, constant-directivity horn that is fully rotatable.
Depending on the model, the horn may be rotated up to
90 degrees to maintain the speaker's same horizontal
coverage angle with the cabinet on its side. This is
especially useful in low-ceilinged rooms and in the
construction of vertical line source arrays.
How to Rotate the Horns
Follow these six simple steps to rotate the horn:
1. Remove the grille assembly (as outlined in
Appendix B).
2. Stuff a clean, lint-free rag in the horn throat to
prevent debris and dropped screws from falling in
and possibly damaging the driver.
3. Remove the Philips head screws securing the horn
to the baffle.
4. Carefully lift the horn off the baffle, taking care
not to disturb the gasket, and rotate the horn
one-quarter turn.
5. Align the mounting holes and replace the screws.
Tighten the screws enough to compress the
gasket and provide a solid, air-tight seal, but
DO NOT OVER-TIGHTEN.
6. Carefully remove the rag and replace the
grille assembly.
15
40º
60º
40º
60º
40º
60º
40º
60º