Level Control - B-52 ACTPRO12M Instruction Manual

ACTPRO
ACTPRO AMPLIFIER REAR CONTROLS
1
POWER
2
PROTECT
3
LIMIT
4
SIGNAL
LEVEL
5
MIN MAX
HP OUTPUTS
L
R
7 OUTPUTS
L
R
INPUTS
L
8
R
PHASE
9
180
●
0
●
GROUND
LIFT
●
10
EARTH
●
POWER
ON
11
OFF
12
~115V 60Hz 2.5A
~230V 50Hz 1.25A
FUSE:
115V: T6.3AL 250V
230V: T3.15AL 250V
AC SELECT
13
B-52 ACTPRO Active Systems - Instruction Manual
10
THE BEAUTY OF POWER
ACT
PRO
18S
700-WATT POWERED SUBWOOFER
INTEGRATED SIGNAL PROCESSING
-
B 52
3. LIMIT LED INDICATOR
The red LIMIT indicator alerts the user that the
amplifier output signal is clipping and therefore
is being compressed by the built-in clip-limiter.
Momentary Bright Red Flashes
Indicates that the amplifier is clipping briefly
causing overdrive distortion and the internal
limiter is reducing gain.
ACTPRO amplifiers employ a sophisticated com-
pressor-limiter circuitry, which is nearly inaudible
at moderate overdrive conditions. It is normal to
see the occasional flashing of the red LIMIT LED.
Continuous Bright Red Light
Indicates continuous and gross overloading of
the amplifier. Such overloads are audible and
may lead to overheating of the amplifier and
shortening the life of the speaker components. If
the amplifier is grossly overloaded and the red
LIMIT LED is on the most of the time, the operator
should reduce the signal level so that LIMIT LED
only flashes occasionally.
4. SIGNAL LED INDICATOR
The green SIGNAL indicator alerts the operator
to the presence of an input signal at the loud-
speaker amplifier.
If there is no indication, check the gain settings
on the amplifier and increase the gain if neces-
sary. Check input connections and audio source
for signal. If no output persists, try a different sig-
nal cable from your mixer to the ACTPRO Series
loudspeaker. If the green SIGNAL LED remains
illuminated without a source connected, the amp
may need servicing.

5. LEVEL CONTROL

Turn the LEVEL control clockwise to increase gain
and counter clockwise to decrease gain. When
operating with the GAIN set at 1/3 volume or
below, it may be possible to exceed the head-
room of input circuitry on your ACTPRO loud-