The Adastra RM1202 rackmount 2-zone
mixer-amplifier is
designed to offer high quality, dependable service for mobile and
installed systems.
The RM1202 is a versatile and powerful mixer amplifier with 5 input
channels which are assignable to 2 independent zone outputs. In addition
to external signal sources, the RM1202 has and integrated
Bluetooth® receiver, FM tuner and USB/SD audio player for
comprehensive audio playback options..
Front Panel
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| 1. |
Media player |
12. |
SD card slot |
| 2. |
Mic 1 level control |
13. |
USB port |
| 3. |
Mic/Line 2 level control |
14. |
Mic 1 zone assign buttons |
| 4. |
Mic/Line 3 level control |
15. |
Mic/Line 2 zone assign buttons |
| 5. |
Line 4 level control |
16. |
Mic/Line 3 zone assign buttons |
| 6. |
Line 5 / Media Player level control |
17. |
Line 4 zone assign buttons |
| 7. |
Zone 1: Bass EQ |
18. |
Line 5 / Media Player zone assign buttons |
| 8. |
Zone 1: Treble EQ |
19. |
Zone 2: Bass EQ |
| 9. |
Zone 1: Master Volume |
20. |
Zone 2: Treble EQ |
| 10. |
Zone 1: Level Indicator LEDs |
21. |
Zone 2: Master Volume |
| 11. |
Power on/off switch & LED |
22. |
Zone 2: Level Indicator LEDs |
Rear Panel
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| 23. |
Voltage selector |
31. |
Line 5 input (2 x RCA) |
| 24. |
Mains power inlet (IEC) |
32. |
Line 4 input (2 x RCA) |
| 25. |
Mains fuse holder |
33. |
Mic/Line 3 input (6.3mm jack) |
| 26. |
24Vdc power terminals |
34. |
Mic/Line 2 input (6.3mm jack) |
| 27. |
Zone 1 speaker output terminals |
35. |
DIP switches |
| 28. |
Zone 2 speaker output terminals |
36. |
Mic.1 input (XLR) |
| 29. |
Zone 1 Line output |
37. |
FM antenna connector |
| 30. |
Zone 2 Line output |
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Connection and Setup
With the RM1202 power switched off (11), connect the rear IEC inlet (24)
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 (23) and that the mains outlet is switched on.
Alternatively, the RM1202 can be operated by 24Vdc power for mobile
applications (boats, fairgrounds etc.)
For this type of application, connect the 24Vdc power source to the DC
input terminals on the rear panel (26)
The RM1202 has 5 input channels and an integral multi-source audio
player.
Channel 1 is a dedicated microphone input via a balanced XLR connector
with switchable priority.
Channels 2 and 3 are designed for either microphones or line level
sources (such as a CD/mp3 player or output from a mixer) via 6.3mm jack
connectors on the rear panel.
Channels 4 and 5 are line inputs via RCA connectors with channel 5
shared by the onboard media player.
An antenna ‘F’ connector (37) is provided on the rear panel for
connection to an external aerial for FM tuning.
DIP switches
Adjacent to the XLR microphone input for channel 1 is a bank of 4 DIP
switches (35).
The right-hand switch is marked ‘VOX’, which sets priority for Mic.1.
When this is switched on, any sound through Mic.1 will temporarily mute
other inputs.
The next DIP switch enables +20V phantom power on the Mic.1 XLR input.
Some condenser microphones require this phantom power to operate.
The 2 remaining DIP switches are used to set channels 2 and 3 to Mic or
Line level.
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.
Signal Inputs and Outputs
Connect the main paging microphone to Mic.1 XLR input (36) and enable
phantom power if required.
Connect microphones or line signals to Mic/Line 2 and 3 inputs (33, 34)
using good quality jack leads.
Line level sources can be connected to Line 4 and 5 RCA inputs (31, 32)
Zone 1 and Zone 2 have individual RCA signal outputs on the rear panel
(29, 30), which can be connected to the line inputs of active speakers
or amplifiers. These are in addition to the speaker outputs detailed
below.
Stereo Operation
Both RCA connectors for Line 4 and Line 5 inputs are summed together to
merge the stereo signal into mono.
This is useful for installed systems where the complete music mix needs
to go to every speaker.
The RM1202 can also be used as a stereo 100V amplifier by connecting a
Left line input to Line 4 enabled to Zone 1 and Right line input to Line
5 enabled to Zone2. This would produce a left output to Zone 1 and Right
output to Zone 2.
Speaker Outputs
The RM1202 has a separate speaker output for each zone (27, 28)
connected via a single terminal block.
The block is removable to enable easy access to the screw terminals.
Each zone output can be used to power either 100V line speakers or
standard 4Ω or 8Ω speakers.
These configurations cannot be used together, so it is important to
decide which will be used at the start.
100V Line Systems
For 100V speakers, connect the selected zone output to the first speaker
in the zone using double-insulated speaker wire which has adequate
current rating to handle the total output of the amplifier.
Connect the “100V” output terminal for the selected zone to the positive
(+) connection of the speaker and “COM” output to the negative (-)
connection of the speaker. Connect further speakers in parallel to the
first speaker with all positive terminals and connected together and all
negative terminals connected together as shown below.
A 100V line speaker system can comprise of many speakers connected
together. The determining factor for how many speakers can be used on a
single amplifier is the power rating. For most purposes, it is advised
to connect as many speakers as needed with a combined wattage of no more
than 90% of the amplifier’s output power rating (in the case of the
RM1202, this is 120W per zone output)
The terminals of a 100V speaker are connected via a transformer and in
some cases, this transformer may be “tapped” for different power
ratings. These tappings can be used to adjust the wattage (and output
volume) of each speaker in a zone to help achieve the ideal total power
of the system for the relevant zone output.
Low Impedance Systems
Alternatively, each zone output of the RM1202 is capable of powering one
or more low impedance speakers.
There is an option on each zone for either a 4Ω or 8Ω speaker output to
determine the minimum impedance.
It is essential to select the correct output terminal when opting for
low impedance speakers.
For a single 8Ω speaker, connect the positive (+) wire to the “8Ω”
terminal and the negative (-) wire to “COM”
For a single 4Ω speaker or for 2 x 8Ω speakers connected in parallel,
connect the positive (+) wire to the “4Ω” terminal and the negative (-)
wire to “COM”
In either case, the connected load should have a combined impedance no
lower than stated on the terminal.
Lower impedance may cause irreparable damage to the amplifier.
The connected speaker(s) must also have a power handling to accept up to
120Wrms from the zone output.
Lower power handling may risk damage to the speakers.
Operation
When all connections to the amplifier are made, turn all rotary controls
down and switch on the power (11).
The power LED will illuminate. To check for correct operation of the
system, select an input source and output zone for testing. In the
following example, Mic.1 input and Zone 1 output have been selected.
Turn the Zone 1 Bass and Treble rotary controls (7, 8) to the
vertical (12 o’clock) position
Turn up Zone 1 Master volume control (9) part way for testing
Make sure that the Zone 1 assign button for Mic.1 channel (14) is
pressed in
Speak into the microphone connected to the Mic.1 input (36)
Gradually turn up the Mic.1 level control (2) whilst checking the
LED indicators for Zone 1 (10)
The microphone should now be audible through loudspeakers connected
to the Zone 1 speaker output.
Increase the Zone 1 output level to the maximum required volume for
that zone
Reduce the Mic/Line level to compensate
The above process can be extended to check all other input channels.
If preferred, the system can be checked using the onboard multi-source
audio player.
Full information on the operation of this feature is detailed below.
Repeat the above process for Zone 2 to check output to the speakers from
the enabled input channels.
Each zone has Bass and Treble controls to adjust the tonal content.
Bass controls the low frequency content and Treble controls the high
frequency content.
The vertical (12 o’clock) position is neutral, rotating to the left is
cut and to the right is boost.
Adjust both controls for each zone to give the desired tonal character
to the connected speakers.
Media player
The RM1202 is fitted with a built-in media player, which allows playback
of music or audio messages stored as standard compressed audio files on
either USB pen drive or SD card.
The media player also has an FM radio tuner function and Bluetooth
receiver as described below.
The output level of the media player is controlled by the LINE 5/USB
control (6) on the front panel.
| SOURCE |
USB / SD / FM tuner / Bluetooth input source selector |
|
Previous track or FM channel / volume down |
|
Play or pause current track / auto tune FM stations |
|
Next track or FM channel / volume up |
| REPEAT |
Repeat mode – off, single track or all |
| MUTE |
Mute media player output |
USB/SD
Push a USB pen drive into the USB port (13) and/or SD card into the SD
card input (12) and the audio files will start to play automatically.
Turn up the MEDIA control gradually to hear the output from the speakers
and increase to the required level.
If play does not start automatically, press the SOURCE button and
Play/Pause button () to check if the player is set to play from the
required memory device. If playback still does not start, try pressing
the Previous track and Next track buttons (, ). Otherwise, check that
the audio files are standard compressed type.
Normal playback will read through all tracks on the storage device.
Pressing the REPEAT button will step through the repeat modes.
RT1 = repeat current track RND = random play RTA = repeat all tracks
Pressing the Previous track button () briefly steps backwards through
tracks on the memory device. Press and hold this button to decrease the
playback volume.
Pressing the Next track button () briefly steps forwards through tracks
on the memory device.
Press and hold this button to increase the playback volume.
To pause the current track, press the Play/Pause button () and press
again to resume playback.
The LCD display will show the selected track number and then the elapsed
time during playback.
FM Tuner
Press the Source button to switch to the FM tuner function. For good FM
reception, it will be necessary to connect an external aerial to the
Antenna connector on the rear panel using good quality coaxial RF cable
terminated with an F-type connector.
To auto-tune available stations, press and hold the Play/Pause button to
begin auto tuning, which scans available stations and automatically
stores them as channels within the FM tuner.
Alternatively, to tune the station presets manually, press the
Play/Pause button briefly to enter manual tuning mode (MANU). Use
Previous/Next track buttons to select the desired frequency and press
REPEAT, then use Previous/Next track buttons to select the preset and
press REPEAT again to store the frequency in that preset (display will
show “OK”). Repeat for all ten presets P01 to P10.
Press MUTE to exit the manual tuning mode.
To step through pre-set stations, press the Previous or Next buttons.
Hold down the REPEAT button to delete a stored station.
Holding the Previous track or Next track buttons will adjust the output
volume of the player.
Bluetooth
The Bluetooth function allows connection of a smart phone or tablet to
the media player section for playback of stored files or streamed
digital audio.
In order to enable this function, it will be necessary to pair the
sending device to the receiver as follows.
Open the Bluetooth settings menu on the smart phone or tablet (or
other sending device)
Scan for Bluetooth devices and look for “adastra 0000” in the list
of available devices
(ensure that the RM amp is powered on and within reception range)
Select “adastra 0000” and the sending device should confirm that it
is connected as an audio device. (note that “0000” may be a
different number if it has been edited – see below)
Play audio from the sending device, ensuring that volume controls
are not turned down/muted
Turn up the LINE 5/USB volume control on the amplifier to the
required level.
The Previous, Next and Play/pause buttons will operate in Bluetooth as
remote playback controls. Holding the Previous track or Next track
buttons will adjust the output volume of the player.
The Bluetooth name can be customized to enable identification of
individual nearby amplifiers.
To customize the Bluetooth number press and hold the Play/Pause button
until adastra 0000 is displayed with one of the characters flashing.
Press Previous or Next buttons to edit the number and Play/Pause to
select another character. Hold Play/Pause to store the ID and exit.
Note: Android devices have the facility to re-name devices within the
Bluetooth settings menu.
If the Bluetooth ID has been re-named on the Android device, editing the
Bluetooth ID on the media player will not affect the name displayed on
that Android device.
Track navigation can be controlled from the paired device or from the
front panel of the RM1202.
Previous, Next and Play/pause buttons (, , ) will operate in Bluetooth
as remote playback controls.
Holding down the Previous or Next buttons will also adjust the volume of
the player.
