CA SERIES POWER AMPLIFIERS MODELS: CA2250/CA2500/CA4250/ CA6160/CA8125 Installation and User Guide
Clearly better sound WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. CAUTION: WARNING: SHOCK HAZARD – DO NOT OPEN AVIS: RISQUE DE CHOC ÉLECTRIQUE – NE PAS OUVRIR The lightning flash with the arrowhead symbol within an equilateral triangle, is intended to alert you to the presence of uninsulated dangerous voltages within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock.
Clearly better sound 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.
Clearly better sound 4 CA Series Installation & User Guide v1.
Clearly better sound Contents SAFETY INFORMATION ..................................................................................................... 6 Safety notes regarding installation.........................................................................................6 Conformities ..................................................................................................................................6 Safety Considerations and Information .................................................
Clearly better sound SAFETY INFORMATION Conformities This product conforms to the following European EMC Standards: Safety notes regarding installation BS EN 55035:2017 (Immunity) BS EN 55032:2015 (Emissions) • • • • Do not expose the unit to water or moisture. BS EN 61000-3-2:2014 (Harmonics) Do not expose the unit to naked flames. BS EN 61000-3-3:2013 (Flicker) • Do not touch any part or terminal carrying the hazardous live symbol while power is supplied to the unit.
Clearly better sound Overview Applicable Models Introduction This Installation Guide describes the installation and operation of the following models: The Cloud CA Series is a range of versatile multi-channel audio power amplifiers of advanced design, able to drive low impedance loudspeakers, or high impedance (100 V-line or 70 V-line) loudspeaker distribution systems directly. They are ideal for sound reinforcement applications in the retail, leisure, hospitality, commercial or industrial sectors.
Clearly better sound CA Series amplifiers - main features • Output stage can drive 70 V/100 V-line systems directly (transformerless), or low impedance loudspeakers (≥4 ohms) • • • • Output mode selectable per-channel • Automatic Power Down: <2.
Clearly better sound Front Panel Description 6 2 3 4 5 6 1 1. POWER SWITCH – press to turn the amplifier off: it turns on automatically on initial application of the AC supply. The integral white LED illuminates when the amplifier is powered, either in its active state or in Automatic Power Down (APD) mode. Each amplifier channel has four LEDs on the front panel, which function as follows: 2. POWERED (green) – illuminates when the channel is active, i.e.
Clearly better sound Rear Panel Description 12 10 1 4 3 12 5 8 2 11 7 6 9 Model CA8125 illustrated: Models CA6160, CA4250 and CA2500 differ only in the number of channels and DIP switch sizes 12 10 1 3 12 5 8 11 2 7 6 4 1. INPUTS CH 1 ... CH n – one 3-pin, 3.5 mm-pitch screwterminal connector per amplifier channel. The inputs are balanced. Connect the audio sources here. 2.
Clearly better sound Due to the units’ weight, the use of rack side rails is recommended. figures are model-dependent: see Specifications.) This state is indicated by the simultaneous illumination of the POWERED, PROTECT and PEAK LEDs for the relevant channels. If no input signal has been detected for 25 minutes the relevant channels will then enter a low-power Standby Mode. In this mode, only the white LED in the power button will be illuminated. The power consumption in Standby Mode is <2.
Clearly better sound Power sharing (high impedance output mode only) Models CA2500/4250/6160/8125: A fundamental design concept of CA Series amplifiers is the availability of Power Sharing when one or more channels is selected to HIGH Z mode, in order to drive 70/100 V-line loudspeaker systems. The maximum power output capability of all CA Series models except the CA2250 is 1 kW: the maximum power output capability of the CA2250 is 500 W.
Clearly better sound Connections and Adjustments Inputs Each amplifier channel has an electronically-balanced input on a 3-pin, 3.5 mm-pitch screw terminal connector 1 . Twin-core screened cable should be used when driving the amplifier inputs from a device with a balanced output. Single-core screened cable can be used when connecting to an unbalanced source. 1 The rear panel INPUT ROUTING DIP switches 2 are used to select input source for each channel, except Channel 1.
Clearly better sound INPUT ROUTING The input routing switches operate in the manner shown in the schematics below.
Clearly better sound Outputs The speaker output connector for each amplifier channel is a 2-pin, 5 mm-pitch screw-terminal type 4 . The plug-in connectors are suitable for cable cores up to 2.5 mm2. Connect as shown below: - + 70/100 V-line operation In high impedance mode, CA Series amplifiers can drive either 100 V-line or 70 V-line loudspeaker distribution systems directly. The system voltage is set by the rear panel SPEAKER LOAD 4Ω/70V / 8Ω/100V DIP switch 7 .
Clearly better sound High Pass Filters Most transformers fitted to 70/100 V-line speakers exhibit core saturation when fed with high-level signals at low frequencies. Transformer saturation creates unpleasant distortion and stresses the system. To counteract this, a correctly configured high pass filter is an essential part of any line distribution system. CA Series amplifiers have a high pass filter in each channel, selectable via the 65Hz FILTER DIP switch on the rear panel 5 .
Clearly better sound Technical Specifications Performance All Models Output Power: CA2250: total output power 500 W, both channels CA2500/CA4250/CA6160/CA8125: total output power 1 kW, all channels1 Outputs: Low-impedance: 4 ohms or 8 ohms (selectable) High-impedance: 70 V or 100 V (rms) Frequency Response: 20 Hz to 20 kHz, +0 dB/-1 dB High Pass Filter: -3 dB @ 65 Hz via rear panel switches Distortion: 0.
Clearly better sound Notes re Power Consumption and Heat Loss measurements: All measurements at 230 VAC 50 Hz power input NOTES Odd- and even-numbered channel groups can deliver up to 500 W simultaneously (CA2250 excepted), but in models with more than two channels, the available power is reduced proportionately when any channel is delivering more than its nominal rating. On Model CA2250, the maximum power of 500 W is shared between the two channels as required. 1. 2. 3. 4. 5. 6.
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