RMS1202

1U DUAL-ZONE MIXER-AMPLIFIER

Item ref: 953.154UK

User Manual

Version 1.0

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing an Adastra RMS1202 dual-zone mixer-amp as part of your sound system.

This low impedance or 100V power amplifier has the advantage of selectable global or individual inputs and a paging mic input.

Please read this manual to gain the best results from your product and avoid damage through misuse.

SAFETY SYMBOL AND MESSAGE CONVENTIONS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

AVIS

RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR

This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit

This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.

SAFETY NOTICE

1.

Prior to use, read through this manual

2.

Keep the manual in good condition

3.

Pay attention to safety warnings

4.

Observe all operating requirements

5.

Do not use the device near water or wet areas

6.

For cleaning, only use a lint-free, dry cloth

7.

Install according to the specifications

8.

Place away from heat sources or heating appliances

9.

Use mains lead provided and avoid damage to cable or connectors

10.

Unplug power from mains during stormy weather or if unused for long periods

11.

In case of malfunction, water ingress or other damage, consult qualified service personnel

12.

Do not place in damp areas or near liquids or moisture. Do not spill liquids on the housing

13.

Please pay attention to warning symbols during transit and placement

14.

Terminals marked with the symbol are HAZARDOUS LIVE and should only be connected by qualified personnel

15.

Ensure that the apparatus is connected to a mains socket with a protective EARTH connection

16.

Ensure correct operation of the mains switch

Warning

To prevent the risk of fire or electric shock, do not expose any components to rain or moisture.

If liquids are spilled on the casing, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use.

Avoid impact, extreme pressure or heavy vibration to the case

No user serviceable parts inside – Do not open the case – refer all servicing to qualified service personnel.

Safety

• Check for correct mains voltage and condition of IEC lead before connecting to power outlet

Placement

• This unit can be used free-standing or fixed int o a 19” rack

• Ensure adequate support and access to controls and connectors when rack-mounting

Cleaning

• Use a soft cloth with a neutral detergent to clean the housing as required

• Do not use strong solvents for cleaning the unit

953.154UK User Manual

Front panel

Rear panel

1. BASS EQ – Paging Mic input

2. TREBLE EQ – Paging Mic input

3. Signal indicator – Paging Mic input

4. BASS EQ – Output channels

5. TREBLE EQ – Output channels

6. INPUT select – AUX or Individual Channel

7. Power on indicator

8. GAIN control – Paging Mic input

9. LEVEL control – Output channels

10. Status indicators – Output channels

11. PAGE MIC on/off select

12. Power on/off switch

13. IEC mains inlet and fuse holder

14. Cooling fan vents

15. 100V speaker output screw terminals

16. 4 Ω speaker output screw terminals

17. Channel 2 balanced input screw terminals

18. Channel 2 unbalanced input 2 x RCA sockets

20.

21.

22.

23.

24.

25.

Channel 1 balanced input screw terminals

Auxiliary line output 2 x RCA sockets

Auxiliary line input 2 x RCA sockets

Phantom power and Vox DIP switches

Paging mic VOX sensitivity control

Paging mic balanced XLR input

19. Channel 1 unbalanced input 2 x RCA sockets 26. 24V emergency mute terminals

Connection

Ensure the Power (12) is switched off until all input and output connections are in place.

Turn both output rotary level controls (9) fully down (anti-clockwise) to avoid loud noises when switching on.

Set the BASS and TREBLE Tone controls (1, 2, 4, 5) to the vertical position (zero)

Loudspeakers should be connected to the RMS1202 via screw terminals on the 2 removable modular connectors.

For standard low impedance speakers (4 Ω , 8 Ω , 16 Ω - i.e. not 100V type), use the bottom row of +/- terminals (16)

Connect + and – wires to each speaker as indicated, ensuring that there is no chance of strands shorting across terminals.

Important: Ensure that the load is no lower than 4 Ω for each output. This can be …

1 x 4 Ω speaker

1 x 8 Ω speaker

2 x 8 Ω speakers wired in parallel (4 Ω )

1 x 16 Ω speaker

2 x 16 Ω speakers wired in parallel (8 Ω )

3 x 16 Ω speakers wired in parallel (5.3

Ω )

4 x 16 Ω speakers wired in parallel (4

Ensure that the connected speakers can handle 120W from each output.

Ω )

If the speaker(s) being connected to an output channel are 100V type, use the top row of terminals (15)

When connecting multiple 100V speakers to this output, connect all speakers in parallel and aim to connect up to

90% of the maximum output power (i.e. 108W).

The wattage of each speaker can sometimes be adjusted via tappings on the speaker (check the speaker ’ s documentation if unsure)

For either speaker output, choose whether the speakers connected will be 100V type or standard low impedance (i.e. 4 Ω , 8 Ω , 16 Ω ) type.

DO NOT connect to both 4 Ω and 100V terminals for one output channel

DO NOT mix 4 Ω and 100V speakers on any single output.

THERE SHOULD BE NO CONNECTIONS VERTICALLY ABOVE OR BELOW EACH OTHER

953.154UK User Manual

The RMS1202 has 2 independent speaker output channels and can be used as a 2-way slave amplifier.

Set each AUX/CH switch (6) to the ‘ out ’ position for individual channel input.

If connecting input to a channel via the pair of RCA inputs (18, 19, 21), these will be summed to mono.

If connecting input to a channel via Euroblock terminals (17, 20), the green block may be removed from the panel for convenience.

Connect the signal “ + ” connection to the “ + ” screw terminal and the “ ” connection to the “ ” screw terminal.

If there is a separate “ ground ” connection (i.e. balanced cable), connect this to the “ G ” terminal.

Otherwise, for unbalanced connections, connect signal to “ + ” and ground to “ G ” (or link both “ ” and “ G ” with a piece of wire)

If 2 or more channels will share the same audio source, there is an option to connect this to the AUX input (21)

To route the AUX to any of the output channels, press the AUX/CH switch to the ‘ in ’ position for each channel to receive the AUX input.

For convenience, the AUX/CH switch (6) can be switched in or out whenever AUX or individual channel input is needed.

For announcements and alerts, there is a PAGING MIC XLR input on the rear panel (25)

Connect a microphone to this input if required and select the PHANTOM power DIP switch (23) to “ on ” if it is a condenser microphone which requires external phantom power from the XLR connector. Next to the PHANTOM power DIP switch is the VOX DIP switch for voice override. Switching this to the “ on ” position will cause all other inputs to be muted when a sound is detected through the paging microphone input. The amount by which this muting takes effect is adjusted using the “ VOX ” rotary trim control (24)

The paging mic input can be switched to either output channel by pressing in the PAGE MIC on/off switch. The paging mic is governed by a GAIN control (8) and BASS + TREBLE tone controls (1, 2). If the microphone is too quiet, increase the GAIN control or if it is too loud, turn this control down. Adjust the BASS and TREBLE controls to achieve the required tonal balance for the microphone output.

If available, connect a 24V trigger from an alarm panel to the alarm contacts (26) to mute all except channel 1 in an emergency.

Connect the rear IEC inlet (13) to the mains using the supplied mains lead (or an equivalent approved type).

Ensure that the supply voltage is correct for this equipment and that the mains outlet is switched on.

Operation

When all signal and speaker connections are made, power up the RMS1202 and gradually increase the LEVEL control (9) of each channel to check the output from both zones. Adjust the levels to the required amount and use the BASS and TREBLE controls (4, 5) to adjust the tone as necessary. For each EQ control, the 12 o ’ clock position is zero and rotating left decreases the amount of bass or treble, whilst rotating right increases the amount of bass or treble.

Test the paging mic input by gradually adjusting the GAIN control (8) to the level needed to hear the microphone clearly through all channels. Again, adjust BASS and TREBLE controls (1, 2) to ensure that the paging mic output is clear and intelligible. If the VOX function is being used, adjust the VOX control (24) on the rear panel to the sensitivity required to hear announcements over background music. If needed, test the emergency mute contacts (26) by applying 24V across the terminals as indicated – all inputs except for the paging microphone should be muted.

After use, turn down all LEVEL controls before powering down to avoid loud pops or clicks through the connected speakers.

Specifications

Power supply

Fuse

170-264Vac, 50/60Hz (IEC)

T3.15AL (250V)

Output Per Channel RMS @ 100V 120Wrms

Output Per Channel RMS @ 4 Ω 120Wrms

Output Per Channel RMS @ 8 Ω

Output Per Channel RMS @ 16 Ω

68Wrms

36Wrms

Inputs

Speaker outputs

Auxiliary output

Input sensitivity

1 x mic (XLR) + 5 line inputs (L+R RCA or +/-/GND terminals) + 1 Aux input (L+R RCA)

100V +/- for Ch1+Ch2 or 4-16

Line out (2 x RCA)

Ω

-24dBV (mic), -10dBV (line/aux)

+/- for Ch1+Ch2 (Euroblock screw terminals)

Frequency response

THD

SNR

Dimensions

Weight

100Hz

1.0%

– 20kHz

80dB (line), 75dB (mic)

482 x 252 x 44mm

5.04kg

Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or

Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life

The goods must be disposed of according to your local council guidelines.

Errors and omissions excepted. Copyright© 2022.

AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ

AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.

953.154UK User Manual