EAW CAZ2500 - Manual (Page 4)

4 – CAZ Series
3. FRONT PANEL FEATURES
1. POWER
Use this rocker switch to turn the unit on or off. This
connects/disconnects the AC power to the AC power
transformer.
The amplifi er is on when the top of the switch is pressed
in. It is off when the bottom of the switch is pressed in.
The Power LED will light when the power switch is on.
2. VENTILATION
Keep these ventilation slots free from any obstructions,
so the air may fl ow freely and cool down the power
transistors.
3. OL LEDs
This is short for “overload.” These red LEDs indicate when
the output of the amplifi er has reached the maximum, and
is right on the edge of clipping. Clipping is bad for speakers
and should be avoided.
It is okay if the OL LED blinks occasionally. It means that
the transient peaks of the music are just hitting the full
output of the amplifi er.
However, if the OL (overload) LED is blinking frequently or
continuously, turn down the source signal (i.e., the mixer’s
master faders) or the amplifi er’s Level controls.
4. SIG LEDs
This is short for “signal present.” These green LEDs
indicate when a signal is present after the Level
controls, at the output stage of the power amplifi er. If
the Level controls are turned all the way down (fully
counterclockwise), these indicators will not light.
5. LEVEL CONTROLS
These two knobs control the levels of Channels A and B.
The knobs are detented to make it easy to set both controls
to the same level. Usually, these controls are set all the
way up.
You might turn them down slightly if you have high-
effi ciency speakers. Also, you could use them to control the
level of line-level sources such as a CD player connected
directly to the amplifi er without a preamplifi er or mixer.
The amplifi ers are designed so that a +3.4 dBu (1.15V rms)
input signal drives the amplifi er to full power into 4 ohms:
CAZ800 = 300 watts per channel into 4 ohms
CAZ1400 = 450 watts per channel into 4 ohms
CAZ2500 = 750 watts per channel into 4 ohms
This equates to a gain of about 30 dB (30 dB, 32 dB, and 34
dB respectively). The graphics around the knob indicate full
gain of (about) 30 dB when the knob is all the way up (fully
clockwise).
After you have set the levels for the mixer (or other signal
source), adjust the Level controls on the amplifi er as the
fi nal adjustment to set the overall volume for the system.
In stereo and mono mode, use both level controls to control
the levels going to each speaker. In bridged mode, turn the
channel B level control down, and just use the channel A
control.
1
SIG OL SIG OL
30 - 30 -
ON
OFF
POWER
A B
dB dB O O O O
2 3
5
4