36-50 MULTI-ZONE MIXING AMPLIFIER Installation and User Guide 36-50 Installation and User Guide V1.
WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. CAUTION: Use of controls or adjustments or performance of procedures other than those specified may result in hazardous radiation exposure.
IMPORTANT SAFETY INSTRUCTIONS 1. Read these Instructions. 2. Keep these Instructions. 3. Heed all Warnings. 4. Follow all Instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturers’ instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers) that produce heat. 9.
Contents IMPORTANT SAFETY INSTRUCTIONS.................................................................................... 3 SAFETY INFORMATION.............................................................................................................. 6 Safety Notes regarding Installation............................................................................................................................. 6 Conformities.................................................................................
SETTING UP & OPERATION..................................................................................................... 16 Music Inputs................................................................................................................................................................... 16 Gain & level................................................................................................................................................................. 16 Local/remote control.........
SAFETY INFORMATION Safety Notes regarding Installation • Do not expose the unit to water or moisture. • Do not expose the unit to naked flames. • Do not block or restrict any air vent. • Do not operate the unit in ambient temperatures above 35°C • Do not touch any part or terminal carrying the hazardous live symbol while power is supplied to the unit.
• Cloud 36-50 (or 36-50T) Multi-Zone Mixing Amplifier • IEC mains lead (AC cord) with moulded plug appropriate to the territory Thank you for purchasing this Cloud Multi-Zone Mixing Amplifier. We are confident that you will be pleased with its performance, features, flexibility and reliability.
Optional system components The following components may form part of the audio system and may be ordered separately if required. They may also be retrofitted to a system at a later time. Separate datasheets are available for each of the individual components; download them at www.cloud.co.uk. RL-1 Series Remote Music Level Control 5 4 6 3 7 2 8 1 9 0 10 MUSIC LEVEL RL-1 Cloud PM Series paging microphones may be connected directly to the 36-50 using the mic input and access port.
Block Diagram The simplified block diagram above illustrates the basic signal architecture of the 36-50. 36-50 Installation and User Guide V1.
Front panel description 7 6 4 1 5 2 6 3 1 5 2 7 3 1. MUSIC SOURCE – 6-way rotary switch selecting which Line Input (1 to 6) will be the music source for each zone. See page 16. 2. MUSIC LEVEL – adjusts the music level in each zone. See page 16. 3. MIC – adjusts the level of the microphone connected to the rear panel mic input in each zone. See page 16. 4. Power – rocker switch with internal illumination. 5.
Rear panel description 1 2 2 3 4 5 2 7 6 10 11 2 8 15 10 11 8 9 14 12 13 1. LINE 1 to LINE 6 – 6 pairs of RCA (phono) sockets for connection of music sources. Inputs are stereo, summed internally to mono. See page 12. 2. GAIN – preset trim control for each line input, providing ±10 dB of gain adjustment for input level matching. See page 16. 3. MICROPHONE INPUT – balanced microphone input on 3-pin female XLR connector. See page 13. 4.
INSTALLATION Hardware considerations The 36-50 Mixing Amplifier is built in a 2U-high 19” rack mount enclosure. It is recommended that the 36-50 is installed in a 19” rack wherever possible.The units are approx. 300 mm deep, but at least 400 mm of rack depth should be available to allow for rear connectors and cabling. The 36-50 uses convection cooling and there are no thermal considerations other than ensuring that the ventilation grilles are not obstructed once the Mixing Amplifier is installed.
the connections are made. A variety of design techniques are in use to implement balanced outputs in audio equipment, and some designs require different wiring protocols to others. Installers are advised to check the manuals with each item for guidance on how the outputs should be connected to an unbalanced input. The mic input may be routed to either primary zone, or to the Utility Output, at any level in each.
PM4 PAGING MICROPHONE PAGING MIC INPUT Z3 Z4 Z5 Z6 Z7 Z8 1 2 ZONE ACCESS CONNECTOR 3 36-50 GND Z2 HOT Z1 0V COLD +V TERM8 TERM2 TERM1 0V Z1 Z2 Z3 Z4 Z5 Z6 Z7 Z8 +V CONNECT TO ZONE(S) IN USE SCN COLD HOT U2 AUDIO 0V Z1 Z2 UTIL 1 2 3 36-50 MICROPHONE INPUT Note that the default factory setting is for all three ACCESS port inputs to be permanently enabled.
(i.e., music) should be muted in an emergency, to ensure that any emergency messages are clearly audible. REMOTE LEVEL CONTROL WIRING RL-1 REMOTE SOURCE + LEVEL 2 1 1 2 3 3 The MUSIC MUTE input is on a 2-pin 5 mm-pitch screwterminal connector. It should be connected to the appropriate alarm output on whichever building management system registers the alarm (typically the Fire System).
The low impedance outputs are still active, but should not have a load connected to them while the 70 V/100 V-line outputs are in use. In the 36-50T model variant, the CXL-3120 is pre-installed at the factory, and wired for 70 V-line operation. This can be changed to 100 V-line operation (per-output) if wished by moving on-board links.
Microphone input EQ Phantom power The various zones in a building often have different acoustic properties, and may also have different models of loudspeaker installed. The 36-50 is fitted with HF and LF EQ adjustments ([8] on page 11) for the music signal of each primary zone output to enable the audio frequency response to be best matched to each zone. The controls should be adjusted by listening; up to 10 dB of cut or boost at 10 kHz (HF) and 50 Hz (LF) is available.
Priorities The 36-50 offers several options for determining what happens to music signals when announcements are made. Mic-over-Music priority Fully automatic, voice operated priority is available for the mic input. This is selected by the rear panel PRIORITY button, which should be IN to enable priority operation.
OPTIONS AND ADDITIONAL INFORMATION RL-1 and RSL-6 Series remote control plates – general considerations Cloud RL-1 Series and RSL-6 Series remote control plates are available in three form factors, two fit single-gang UK or American electrical back boxes respectively; the third is a 50 x 50 mm “Media” module, suitable for “Euro-module” mounting frames available in most European countries. Back boxes of either the recessed type or surface-mounting type may be used, providing they are at least 25 mm deep.
Fitting loudspeaker EQ cards The 36-50 is compatible with various popular installed-sound loudspeakers; a single-channel loudspeaker equalisation module may be fitted to any or all of the three outputs as required, to optimise the frequency response of the channel to the loudspeaker type being used. The cards may be obtained from Cloud Electronics as optional accessories. Please check the Cloud website (www.cloud.co.uk) for makes and models of loudspeakers for which compatible EQ cards are available.
APPENDIX Table of internal jumpers and default settings The 36-50 has various internal jumpers, the setting of which may require alteration during installation. All the jumpers are on the main PCB. The table below lists each jumper and its purpose, together with the factory default setting.
PCB jumper locations The diagram below shows the locations of the internal jumpers (not to scale) on the main PCB. The jumpers have two possible positions; the black square in the symbol indicates the default setting. If any jumpers need to be changed, turn the Mixer Amplifier off and disconnect it from the mains. Undo the 8 screws securing the top cover of the unit and remove it. Use a pair of small pliers to gently remove the jumpers from the PCB headers and reposition them.
TECHNICAL SPECIFICATIONS Line Inputs Frequency Response Distortion Sensitivity Input gain control range Input Impedance Headroom Noise Equalisation Microphone Inputs Frequency Response Distortion Gain Range Input Impedance Common mode rejection Headroom Noise Equalisation Outputs 20 Hz to 20 kHz ±0.5 dB <0.05%, 20 Hz to 20 kHz 195 mV (-12 dBu) to 2.0 V (+8 dBu) 20 dB 47 kohms >20 dB -90 dB A-weighted (0 dB gain) HF: ±10 dB @10 kHz; LF: ±10 dB @ 50 Hz 100 Hz -3 dB (fixed filter) to 20 kHz ±0.5 dB <0.
Cloud Electronics Limited 140 Staniforth Road Sheffield S9 3HF England Tel: +44 (0)114 244 7051 Fax: +44 (0)114 242 5462 email: info@cloud.co.uk web: www.cloud.co.uk Cloud Electronics USA 2065 Sidewinder Drive, Suite 200, Park City, Utah 84060. United States of America. Toll Free: 0855 810 0161 Web: www.cloudusa.pro E-mail: sales@cloudusa.
