PAGE 6
AMB SERIES AUDIO POWER AMPLIFIERS INSTALLATION AND OPERATION MANUAL
CONTROLS, CONNECTORS & INDICATORS
REAR PANEL
8
Balanced Input
A female 3-pin combined XLR connector is provided on each input:
Pin 1 = Signal Ground;
Pin 2 = Hot (non-inverting or in phase);
Pin 3 = Cold (inverting or reverse phase).
9
Signal Strapping
A male 3-pin XLR type connector is provided and wired in parallel with the
female input XLR for strapping / looping signal between amplifiers.
10
Binding Post Outputs
Touch proof binding posts (banana jacks) are provided for speaker output
termination with banana plugs or bare wire. The red post is used as positive and
the black post is used as negative. For bridge connection, use only the red posts.
11
Speaker Output Connector
A 4 pole Neutrik SpeakON connector is provided as an additional speaker
output. This standard of loudspeaker-to-amplifier connection allows access to
both channels of the amplifier via the one connector for bi-amp applications.
Channel 1 is considered the dominant channel and has both channels wired to
the speaker connector. See the installation section of this manual for detailed
information on speaker connector wiring.
12
Mains Connection
Your amplifier is fitted with an internationally recognised IEC mains inlet
connector.
Please ensure that the connecting mains lead for use with the IEC connector
is of an approved type and is of sufficient current carrying ability.
NOTE:
Your unit must always be earthed!
13
Circuit Breaker
The amplifier is fitted with a resettable circuit breaker.
If the circuit breaker trips, allow 3 mins for the contacts to reset thermally
before pushing the reset button to reset it mechanically.
14
Stereo/Bridge/Parallel Mono Switch
When set to STEREO, your amplifier operates as two independent channels.
When set to PARALLEL, your amplifier will only accept signal applied to
Channel 1’s input XLR. Channel 2’s output signal will come from Channel
1’s input but both channels will have independent attenuator control.
When set to BRIDGE mode of operation your amplifier will only accept
signal applied to channel 1’s input XLRs and the level of both channels
will be controlled by the Channel A attenuator. The output from Channel 2
will automatically be of the opposite polarity (reversed phase) and speaker
termination should be sourced from the red binding-post outputs.
Alternatively, the speaker could be connected to poles 1+ & 2+ of the
4 pole speaker connector (see Installation – Output Wiring on page 7).
12
13
10
11
14
9
8
