Installation and Use
ATTENTION!!
Do not open the amplifier – all user-adjustable parts are external - refer servicing to
qualified personnel!
If replacing the fuse is necessary use only the same type and rating!
Do not expose the amplifier to rain or moisture!
This manual contains important information for correct and safe use. Read it carefully before
using the amplifier. Keep it for future consultation.
Connection to the mains supply
Before connecting the amplifier to the mains socket always make sure that:
-
The electric system and mains socket have an adequate grounding – compatible with
the safety regulations for your country (If you are uncertain consult specialized
personnel);
-
The mains voltage corresponds to that shown on the rear panel (accepted allowance is
up to +/-10%);
-
Power cord is not damaged and has no bare wires;
-
The on/off switch is in the off position.
Also make sure that the amplifier is off before disconnecting the power cord from the mains
socket.
Switching on and off
In your sound reinforcement system
always switch on the amplifier after all the other
equipment and always switch it off before
, if possible with gain control set at minimum – this
will avoid dangerous signal peaks.
Installation
The amplifier can be used in 19” rack mounting or separately.
Do not expose the amplifier to direct sunlight or any source of heat or rain.
Do not cover the amplifier during its operation.
All of these actions can cause faulty operation or even electric shock or fire.
Audio Connections
Always use good quality cables of the appropriate type.
Take care of cables and check their condition frequently. Grip them by the connector, do not pull
them forcefully and wind them without knots and sharp bends.
Front Panel
1
2
3
3
1. Power switch - used for turning on or off the amplifier
2. Gain control
3. LED indicators:
Green light of ON indicator indicates that the amplifier is on, no matter if there is any
input signal.
Green SIGNAL LED indicates the presence of the signal.
Red CLIP LED indicates clipping (=flattening the peaks of the waveform) of the
amplifier, i. e. that audio signal level exceeds the capacity of the amplifier channel. In
this case reduce the input signal level until the CLIP LED goes out..
Rear Panel
6
5
3
4
2
1
1. Power mains cord
2. Mains
fuse
3. Balanced INPUT connector
Input female XLR connector can receive balanced or unbalanced signal.
Note: Prefer using balanced cable; they are less prone to AC hum. Avoid mixing
balanced and unbalanced cables for one sound system as even one unbalanced cable
can unbalance the whole system and cause hum.
4. Unbalanced INPUT connector
RCA connectors
Note: It is possible to use balanced and unbalanced INPUT at the same time. Then
output signal is powered mix of both INPUTs. In this case the amplifier works as a
mixer.
5. SEND
connector
Input male XLR connector also can receive balanced or unbalanced signal.
Balanced INPUT and SEND connectors are connected in parallel. The same signal that
is present at the INPUT connector is present at the SEND connector.
6. OUTPUT connector
Terminal block is used for output signal. You can use 100V or 70V or 50V output.
5
6
