R
otatable horn
The CM-9 feature a rotatable horn that allows the speaker to be flown vertically or horizontally and still maintain
the required dispersion. The default positioning of the horn is for horizontal installation. If vertical installation is
required remove the grill and unscrew the horn base-plate. The horn can now be rotated 90 degrees to achieve the
required dispersion.
H
orn protection
The horn features a thermal protection circuit that increases the impedance when the current exceeds a safe level.
The increased impedance reduces current to the horn, thus protecting it against damage. The audible result is
lower output from the horn. When this happens,
do not increase the high frequency level on the EQ or tone control,
as
this may cause damage to the protection circuit and possibly also the diaphragm.
When the current returns to a safe level, the protection circuit restores full signal current to the horn, and the audio
output returns to normal.
The thermal protection is very efficient as it combines good protection with excellent sound quality. The
components in the protection circuit are all linear and thus have no influence on the sound when not engaged.
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