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953.141UK User Manual
Connection and setup
Connect the rear IEC inlet (17) to the mains using the supplied mains lead (or an equivalent approved type).
Ensure that the voltage is correct as indicated on the voltage selector (16) and that the mains outlet is
switched on.
Alternatively, the amplifier can be powered by a 24V battery, such as a lorry or boat battery, by connecting
the “+” and “-” of the battery to the 24Vdc INPUT (18) on the rear panel. Ensure that DC cables are capable
of handling the current (10A min. recommended)
Ensure the POWER (14) is switched off until all input and speaker connections are in place.
The RMC120 has a total of 5 input channels. MIC 1 input (26) is fed to a dedicated microphone channel.
Connect the main announcement microphone to this channel using a balanced XLR lead.
DIP switches
MIC 1 channel has an option for +20V phantom power for condenser
microphones and paging microphones with chimes.
MIC 1 also has the option of VOX control, which attenuates the line
input channels 4 and 5 by -40dB when MIC 1 signal is detected and
returns them to normal when MIC 1 signal is silent.
These features are set by DIP switches (25) as shown here.
Moving the DIP switch down will switch the feature ON.
MIC/LINE 2 (24) and MIC/LINE 3 (23) jack inputs can be set to MIC or
LINE sensitivity to suit the type of input being used. Moving the
relevant DIP switch down selects LINE sensitivity. Moving the DIP
switch up selects MIC sensitivity.
Be sure to make these DIP switch settings when the amplifier is
switched off. Making any changes when the amplifier is powered up may cause loud bangs through the
system which can damage the speakers.
Connect microphones or mono line inputs to MIC/LINE 2 and MIC/LINE 3 inputs using good quality 6.3mm
jack leads. Make sure the correct sensitivity is selected for the type of input source.
Connect any other line level audio inputs to the LINE 4 (22) and LINE 5 (21) connectors on the rear panel
using good quality RCA leads. Since RM series amplifiers are mono output, stereo signals will be summed
together.
LINE 5 input can be used in place of the integral CD/USB/SD/FM player.
Further mixer-amplifiers or slave amplifiers can be connected from the rear LINE OUT sockets (20), again
using a good quality RCA lead. This output carries the full mix of all channels 1 – 5 as produced through the
speakers.
Speaker outputs
The RMC120 can be used either as a 100V line amplifier or standard low impedance power amplifier. These 2
configurations cannot be used together, so it is important to decide which method will be used at the start.
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