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RCA INPUT CONNECTIONS (UNBALANCED)
1
One for the left channel's audio input and one for the right
channel's audio input. From your mixer, insert the left channel's RCA
connector into the left channel's (L) INPUT connector. Connect the right
channel of your mixer by inserting the RCA connector into the right
channel's (R) INPUT connector on the amplifier.
2
XLR INPUT CONNECTIONS (BALANCED)
One for the left channel's audio input and one for the right
channel's audio input.
Balanced connections should be used as much as possible to reduce
AC hum and interference, especially with long runs of cable. The input
impedance is 20k Ohm for balanced connections.
From your mixer, insert the left channel's XLR connector
into the left channel's (L) INPUT connector. Connect the right channel
of your mixer by inserting the XLR connector into the right channel's (R)
INPUT connector on the amplifier.
3
LINK (FULL RANGE) OUTPUT CONNECTIONS
The link output connectors are wired in parallel with the inputs, allowing
connection of multiple systems in a "daisy-chain" fashion. Use these
outputs marked LINK (Left and/or Right) when you are connecting to
other speakers and/or to other powered loudspeakers.
NOTE: Make sure to power OFF the MATRIX-1500 and/or other
powered loudspeakers connected to the OUTPUT before turning
off the subwoofer power. This will prevent any unwanted transients
(thuds, lowpops) from coming out of the connected loudspeakers.
GROUND LIFT SWITCH
4
The MATRIX-1500 amplifier is equipped with a GROUND LIFT switch.
Powered loudspeakers are often fed by long run signal cables, connected
to power outlets different than the audio source's. This may create an
audible hum or buzz due to ground loops or other connection problems.
The GROUND LIFT switch will help you to avoid these issues.
It is a good idea to keep the GROUND LIFT switch in EARTH position
unless you have hum or buzz coming from your speakers. If you do
hear hum or buzz, toggle switch into LIFT position.
WARNING: NEVER BREAK EARTH CONNECTION IN YOUR AC
PLUG. IT MAY CAUSE PERMANENT DAMAGE TO THE AMPLIFIER
AND MAY CAUSE DANGER OF ELECTRICAL SHOCK TO YOU AND
OTHERS.
5
LED POWER INDICATOR
The green LED POWER indicator, located on the back of the amplifier,
will illuminate when the AC Power switch is in the "ON" position. The
LED POWER indicator will dim and turn off when the AC Power switch
is in the "OFF" position or AC mains power has been disconnected
from the loudspeaker.
If the POWER indicator does not illuminate when the loudspeaker is
powered on, verify the AC mains line cord is properly connected to
the loudspeaker and inserted into the AC outlet. Verify the AC outlet at
the venue of operation is functioning properly. In the event of the AC
mains outlet functioning properly, but the loudspeaker fails to operate,
the loudspeaker may require servicing.
Please contact support@B-52pro.com for service instructions.
7
PROTECT LED INDICATOR
6
If the power module overheats, the amplifier will go into "protection mode"
to limit further temperature rise. The amplifier will take about 30 seconds to
several minutes for the temperature to drop and resume operation.
direct sunlight for a prolonged period of time during operation, or
playing the loudspeaker past its operational limits.
If thermal overheating occurs, reduce signal level to avoid constant
illumination of the LIMIT LED INDICATOR. Make sure the air vents
on the back of the amplifier are not blocked.
LIMIT LED INDICATOR
7
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
distortion and the internal limiter is reducing gain.
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
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.
SIGNAL LED INDICATOR
8
input signal at the amplifier.
increase the gain if necessary. Check input connections and audio
source for signal. If no output persists, try a different signal cable
from your mixer to the MATRIX-1500.
connected, the amp may need servicing.
SATELLITE CHANNELS LEVEL CONTROL
9
Turn the right and left LEVELs control clockwise to increase gain
and counter clockwise to decrease gain of the satellite channels.
When operating with the GAIN set at 2/3 volume or below, it may be
possible to exceed the headroom of input circuitry. If this is the case,
reduce the input signal strength and increase the
gain of the amplifier.
10
SUBWOOFER LEVEL CONTROL
Turn the sub LEVEL control clockwise to increase gain and counter
clockwise to decrease gain of the subwoofer. When operating with
the GAIN set at 2/3 volume or below, it may be possible to exceed the
headroom of input circuitry. If this is the case, reduce the input signal
strength and increase the gain of the loudspeaker
amplifier.
NOTE: The subwoofer channel and satellite channels work in tandem.
e the satellite levels first and then adjust the subwoofer channel
for your prefererd balance.
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