EVOCA 30H
30W Outdoor Horn Speaker for PA Systems
6
5.1. Speaker Connection
EVOCA 30H horn speaker is equipped with a built-in line transformer with 5 pow
-
er taps, to better adapt each speaker to the type of line (constant voltage @ 70V,
100V and low-impedance @ 8Ω), the power of the amplifier, and the number of
speakers in the system.
When connect the horn to the line, pay attention to wire colors (red = positive;
black = ground) and then adjust rotary selector on speaker back. Please refer to
the following table.
Position
Power
Impedance
70V
100V
1
15W
30W
333Ω
2
7.5W
15W
666Ω
3
3.75W
7.5W
1.3kΩ
4
1.88W
3.75W
2.6Ω
5
OFF
OFF
OFF
6
30W
8Ω
6. UNDER-POWERING VS OVER-POWERING
Most speaker damages are caused by amplifiers with too little power (wattage).
Overdriven amplifiers clip output waveforms and send distortion to the speakers.
Clipping is usually audible; it may vary from a harsh sound to a fuzzy or unclear
sound.
If you hear this condition at loud volume levels, turn down the amplifier volume
until the distortion is no longer present. Damages caused by operating the speak-
ers at distorted volume levels are no covered by warranty.
NOTE: Total number of speakers multiplied by tap value cannot
exceed the output power (in watts) of the 100V or 70V amplifier. If,
for instance, you’re going to install 5pcs of EVOCA 30H speaker horn
with 30W power (position 1) on a 100V line, you need an amplifier
with at least 5x30=150W RMS power. A good rule of thumb is to use
an amplifier with 20% greater power; in this case, an amplifier with
180W or more.