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6 – VR21 and VR51
VR21 and VR51 – 7
Horn Rotation Instructions
• The high-frequency horn can be rotated through 90 degrees to allow you to choose
the best horn pattern for your installation. From the factory, the horn is set to give
a 90 degrees horizontal pattern if the loudspeaker is mounted vertically. If you
mount the loudspeaker horizontally, you can rotate the horn through 90 degrees to
compensate. This is done as follows:
1. Using a medium phillips screwdriver, remove the 18 screws attaching the grille
to the enclosure, and gently remove the grille. Do not remove the foam grille
backing.
2. Using a 5/32" Allen wrench, remove the 8 bolts attaching the horn
to the enclosure.
3. Gently pry the horn assembly away from the enclosure (it may be
stuck due to the gasket seal). Support the horn assembly so it does
not drop when it comes free. Be careful not to pull on the speaker wires.
4. Rotate the horn assembly through 90 degrees (the horn is marked with 60 and 90
on the edges to show the direction of the pattern).
5. Reattach the horn assembly to the enclosure using the 8 bolts from step 2.
6. Replace the grille and secure the screws holding it to the enclosure.
Horn Replacement Instructions
• The standard horn has a beamwidth of 90 degrees x 60 degrees. This can be replaced
by a 60 degree x 45 degree horn supplied, as follows:
1. Follow steps 1, 2, and 3 above to undo the horn assembly from the enclosure.
2. Remove the two speaker wires by pressing down on the spring terminals on the
back of the driver, and gently
pulling out the wires.
3. Using a 10 mm wrench,
remove the 4 hex head
screws from the horn
ange, and remove the horn.
Note that the driver and
a transition piece remain
bolted together.
4. Use the same 4 hex head
screws to bolt the new horn securely in place of the original horn.
5. Reconnect the two wires, making sure the red wire goes to the red (positive)
terminal, and the black wire goes to the black (negative) terminal.
6. Mate the horn assembly to the enclosure in the desired orientation. The horn is
marked with 60 and 45 on the edges to show the direction of the pattern.