953.160UK User Manual
Introduction
The RM406 is a versatile and powerful mixer amplifier with 4 input channels which can be assigned in a matrix
to any of 6 zone outputs. In addition to external signal sources, the RM406 has and integrated Bluetooth
®
receiver, FM tuner and USB/SD audio player for comprehensive audio playback options. Please read the
following instructions to get the best results from the equipment and avoid damage through misuse.
Connection and setup
With the RM406 power switched off (36), connect the rear IEC inlet (47) 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 (37) and that the mains outlet is switched on.
The RM406 has 4 input channels and an integral multi-source audio player.
Channels 1, 2 and 3 are designed for either microphones or line level sources (such as a CD/mp3 player or
output from a mixer) via combo connectors on the rear panel.
These can accept either XLR or 6.3mm plugs for balanced or unbalanced signals.
DIP switches
Mic/Line inputs 1, 2 and 3 each have 2 DIP switches on the rear panel (52, 53, 54) to set the input level
and/or ac20V phantom power for use with condenser microphones.
Set the level correctly for the type of input source connected (Mic or Line)
If the source connected is a condenser microphone which requires phantom power, make sure that the
phantom is switched on for that channel.
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.
Priority and Emergency Activation
The Mic/Line 1 input also has a Priority switch (55), which attenuates all other channels when Mic/Line 1
signal is detected and returns them to normal when Mic/Line 1 signal is silent.
For buildings with a main emergency alarm panel (for fire alerts etc.), the RM406 has Mute contacts on the
rear panel (46), which will mute all audio except for channel 1 when activated by a 24V trigger voltage.
This leaves channel 1 active for evacuation announcements in the case of an emergency.
(The 24V contacts can be connected with either po/- or -/+ to operate)
The screw terminal plug can be pulled out to make connection easier. 2-core bell wire is appropriate for this.
Connect a 24Vdc output from the alarm control panel observing the correct polarity shown on the contacts.
Signal Inputs and Outputs
Connect microphones or line signals to Mic/Line 1, 2 and 3 inputs (43, 44, 45) using good quality signal leads.
A stereo or mono line level source can be connected to the Auxiliary channel 4 input on 2 RCA connectors (42)
For checking the output of any zone, an assignable Monitor output can be connected to headphones from the
front panel 6.3mm jack (34) or as a line output (e.g. to active speakers) from RCA connectors at the rear (51)
Each zone output has a dedicated RCA signal output on the rear panel (41), which can be connected to the
line inputs of active speakers or amplifiers. These are in addition to the speaker outputs detailed below.
An antenna input (46) is provided on the rear panel for connection to an external aerial for FM tuning.
