User Guide for muzcentre models including: CA Series, CA Series 8 Channel Power Amplifiers, 8 Channel Power Amplifiers, Power Amplifiers, Amplifiers
CA SERIES POWER AMPLIFIERS MODELS: CA2250/CA2500/CA4250/ CA6160/CA8125 https://muzcentre.ru 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. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. 2 CA Series Installation & User Guide v1.0 IMPORTANT SAFETY INSTRUCTIONS Clearly better sound 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. Do not defeat the safety purpose of the polarized or grounding - type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. 12. Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the apparatus, when a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not expose the apparatus to dripping or splashing, and ensure that no objects filled with water, such as vases, are placed on the apparatus. L'appareil ne doit être exposé aux écoulements ou aux éclaboussures et aucun objet ne contenant de liquide, tel qu'un vase, ne doit être placé sur l'appareil. The mains plug is used as the disconnect device and it should remain readily accessible during intended use. In order to isolate the apparatus from the mains, the mains plug should be completely removed from the mains outlet socket. Le prise du secteur ne doit pas être obstruée ou doit être facilement accessible pendant son utilisation. Pour être complètement déconnnecté de l'alimentation d'entrée, la prise doit être débranchée du secteur. CA Series Installation & User Guide v1.0 3 Clearly better sound 4 CA Series Installation & User Guide v1.0 Contents SAFETY INFORMATION...................................................................................................... 6 Safety notes regarding installation.........................................................................................6 Conformities...................................................................................................................................6 Safety Considerations and Information.................................................................................6 High Voltage ..............................................................................................................................6 Mains Fuse ..................................................................................................................................6 Servicing ......................................................................................................................................6 Overview............................................................................................................................... 7 Introduction ...................................................................................................................................7 Applicable Models.........................................................................................................................7 CA Series amplifiers - main features.......................................................................................8 What's in the Box..........................................................................................................................8 Block Diagram...................................................................................................................... 8 Front Panel Description..................................................................................................... 9 Rear Panel Description..................................................................................................... 10 Installation......................................................................................................................... 11 Mechanical................................................................................................................................... 11 Ventilation.................................................................................................................................... 11 Power requirements and turning the amplifier on and off........................................... 11 Remote Power Down............................................................................................................ 11 Amplifier Protection.............................................................................................................. 11 Power sharing (high impedance output mode only)................................................... 12 Connections and Adjustments....................................................................................... 13 Inputs............................................................................................................................................. 13 Input Routing........................................................................................................................... 13 Outputs......................................................................................................................................... 15 70/100 V-line operation...................................................................................................... 15 Low impedance operation................................................................................................... 16 Level Control................................................................................................................................ 16 Technical Specifications.................................................................................................. 17 Clearly better sound CA Series Installation & User Guide v1.0 5 Clearly better sound 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. · Do not perform any internal adjustments unless you are qualified to do so and fully understand the hazards associated with mains operated equipment. · The unit has no user serviceable parts. Refer any servicing to qualified service personnel. · If the moulded plug is cut off the AC power lead for any reason, the discarded plug is a potential hazard and should be disposed of in a responsible manner. Conformities This product conforms to the following European EMC Standards: BS EN 55035:2017 (Immunity) BS EN 55032:2015 (Emissions) BS EN 61000-3-2:2014 (Harmonics) BS EN 61000-3-3:2013 (Flicker) This product has been tested for use in commercial and light industrial environments. If the equipment is used in controlled EMC environments, the urban outdoors, heavy industrial environments or close to railways, transmitters, overhead power lines etc. the performance of the unit may be degraded. This product conforms to the following electrical safety standard: BS EN 62368-1:2014 Safety Considerations and Information All models in the Cloud CA amplifier range must be earthed. Ensure that the mains power supply provides an effective earth connection using a three-wire termination. Caution High Voltage Do not touch any part or terminal carrying the hazardous live symbol while power is applied to the unit. Terminals to which the hazardous live symbol refers require installation by a qualified person. Caution Mains Fuse CA Series amplifiers contain no user-replaceable fuses. Caution Servicing The unit contains no user-serviceable parts. Refer servicing to qualified personnel. Do not perform servicing unless you are qualified to do so. Disconnect the power cable from the unit before removing the top panel and do not make any internal adjustments with the unit switched on. Only reassemble the unit using bolts/screws identical to the original parts. RoHS and WEEE declaration Cloud Electronics Limited manages its business and collaborates with its suppliers to comply with the European Union restriction of the use of certain hazardous substances in electrical and electronic equipment, RoHS Directive (2002/95/EC), that came into force on 1st July 2006, and similar restrictions in other jurisdictions. The "crossed out wheelie bin" symbol on the product and represented above is there to remind users of the obligation of selective collection of waste. This label is applied to various products to indicate that the product is not to be thrown away as unsorted municipal waste. At the end of life, dispose of this product by returning it to the point of sale or to your local municipal collection point for recycling of electric and electronic devices. Customer participation is important to minimize the potential effects on the environment and human health that can result from hazardous substances that may be contained in this product. Please dispose of this product and its packaging in accordance with local and national disposal regulations, including those governing the recovery and recycling of waste electrical and electronic equipment. Contact your local waste administration, waste collection company or dealer. 6 CA Series Installation & User Guide v1.0 Overview Introduction 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. Models CA2500, CA4250, CA6160 and CA8125 are capable of delivering 1 kW of audio power. In high impedance (70/100 V-line) mode, this maximum power rating can be shared between channels in an intelligent manner, allowing the amplifiers to drive different types or numbers of loudspeakers in the various areas of a building or venue with maximum economy. Model CA2250 can deliver a maximum of 500 W of audio power, which may be similarly shared between its two channels. The range comprises five models which, with the exception of Model CA2250, differ only in the number of channels. The figure in the "POWER" column below represents the power that can be delivered to a four or eight ohm load when all channels are equally driven: MODEL CA2250 CA2500 CA4250 CA6160 CA8125 CHANNELS 2 2 4 6 8 POWER 2 X 250 W 2 X 500 W 4 X 250 W 6 X 160 W 8 x 125 W Clearly better sound Applicable Models This Installation Guide describes the installation and operation of the following models: · Cloud CA2250: 2-channel amplifier, low impedance and 70/100 V-line outputs, total rating 500 W · Cloud CA2500: 2-channel amplifier, low impedance and 70/100 V-line outputs, total rating 1 kW · Cloud CA4250: 4-channel amplifier, low impedance and 70/100 V-line outputs, total rating 1 kW · Cloud CA6160: 6-channel amplifier, low impedance and 70/100 V-line outputs, total rating 1 kW · Cloud CA8125: 8-channel amplifier, low impedance and 70/100 V-line outputs, total rating 1 kW Wherever the term "CA Series amplifier" or simply "amplifier" is used in this manual, it may be assumed that the information is applicable to all the above models. Where information is specific to one (or more) models only, clear reference to the relevant model type(s) will be made. NOTE: Cloud amplifier models CV2500, CV4250 and CV8125 are NOT covered by this Guide. Particular design attention has been paid to the amplifiers' energy efficiency. The Class D output stages dispense with line output transformers, and consequently offer great savings in weight and size over earlier designs. An automatic, two-stage power-down feature (APD) mutes the amplifier if no input signal has been detected for 15 minutes, and then enters an ultra-low-current standby mode if no input signal has been detected for 25 minutes; in this latter mode the power consumption is less than 2.5 W. The amplifiers also include a remote standby/wake up function, enabling them to be placed into standby mode - and subsequently poweredup again - by a simple external contact closure. The APD feature can be disabled by a rear panel DIP switch. Safety features of the design include output DC detection, overcurrent protection, and thermal monitoring. A switchon delay provides loudspeaker protection at power-up. All models use variablespeed forced-air cooling. CA Series Installation & User Guide v1.0 7 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 · Balanced line level inputs · Per-channel output level controls · Per-channel rear panel input switches for input routing, high or low impedance operation, 70 V/100 V-line selection and high-pass filter · Automatic Power Down: <2.5 W power consumption with all channels quiescent · Remote Power control input · Global disable of APD function · Variable speed forced-air cooling · Thermal protection, overcurrent limiting and DC offset protection · Switch-on delay for speaker protection during power-up · Universal PSU operates from 100 to 240 VAC Available Options: · CDI-CA2, CDI-CA4, CDI-CA8 Dante® input cards (providing 2, 4 and 8 Dante input channels respectively) What's in the Box Please check the shipping carton for damage before opening. If there is damage, please contact your Cloud agent and the shippers. The packing carton should contain the following items: · Cloud CA Series amplifier · Set of mating plug-in screw-terminal connectors · Mains cable(s) Block Diagram OPTIONAL AUXILIARY INPUT CARD INPUT ROUTING LIMITER SPEAKER LOAD CONFIGURATION 4 / 70V HI-Z 1 8 / 100V ON 1 LOW-Z ON AMP PROTECT 8 CA Series Installation & User Guide v1.0 Front Panel Description 6 2345 Clearly better sound 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., it has been "woken up" when the output signal level exceeds -65 dB relative to maximum output level (typical threshold: may vary with programme type). 3. SIGNAL (green) illuminates when the output signal level from the amplifier channel is at least 2.5 Vrms. 4. PEAK (yellow) illuminates when the channel's limiter is active, i.e., reducing gain. 5. PROTECT (red) indicates a fault condition. It illuminates when the power amplifier stage is shut down by the internal protection circuitry, which will occur if excessive current or DC is detected at the output terminals, or if the internal temperature becomes too high. Over-current or DC fault conditions can be cleared by removing the AC power supply for a few seconds, but when the cause is over-temperature, the amplifier will remain in its protected state until the temperature drops (which will generally occur if the input signal is reduced). 6. Ventilation intakes these should always be unobstructed when the amplifier is in use. CA Series Installation & User Guide v1.0 9 Clearly better sound Rear Panel Description 10 12 4 11 13 10 12 5 82 7 6 9 Model CA8125 illustrated: Models CA6160, CA4250 and CA2500 differ only in the number of channels and DIP switch sizes 12 11 13 12 5 8 27 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. INPUT ROUTING a 2-, 4-, 6- or 8-way DIP switch depending on model; exception is Model CA2250 which uses SW4 (CH2 INPUT ROUTING) of the single 8-pole DIP switch. The factory default setting is with all switch sections up: in this state each amplifier channel will be fed by the same-numbered input connector. See page 13 for full description of function. Note that section SW1 on Models CA2500/4250/6160/8125 has a different purpose. 3. LEVEL one recessed preset-type control per channel: adjusts the output level of the channel. 4. SPEAKER OUTPUTS one 2-pin, 5 mm-pitch screwterminal connector per amplifier channel. Connect the feeds to the loudspeaker systems here. Note that the same connectors are used for both low impedance and high impedance (70/100 V-line) operation. 5. 65Hz FILTER a 2-, 4-, 6- or 8-way DIP switch depending on model; exception is Model CA2250 which use SW1 and SW2 (CH1/CH2 65Hz HPF) of the single 8-pole DIP switch. The factory default setting is with all switches down and filters active. The filter frequency is 65 Hz: frequencies below this will be attenuated. 6. SPEAKER LOAD: HIGH Z/LOW Z - a 2-, 4-, 6- or 8-way DIP switch depending on model; exception is Model CA2250 which use SW7 and SW8 (CH1/2 Hi-Z/Lo-Z) of the single 8-pole DIP switch. In the HIGH Z position (up), the channel's output stage is configured for driving 70/100 V-line systems. In the LOW Z position (down), the channels output stage is configured to drive low impedance speakers (4 or 8 ohms). 7. SPEAKER LOAD: 4/70V / 8/100V a 2-, 4-, 6- or 9 Model CA2250 8-way DIP switch depending on model; exception is Model CA2250 which uses SW5 and SW6 (CH1/CH2 4/70v or 8/100V) of the single 8-pole DIP switch. The function of these switches depend on the setting of the HIGH Z/LOW Z switch [6]. In high impedance mode, the switches configure the channel's output stage for either 70 V-line (up) or 100 V-line (down) operation. In low impedance mode, the switches configure the channel's output stage for either a minimum load of four ohms (up) or a minimum load of eight ohms (down). 8. AUTO POWER DOWN ON/OFF - set this switch to ON (down) to enable the amplifier's Automatic Power Down (APD) function. When enabled, channels will mute after 15 minutes if no input signal is detected; if no signal is detected for 25 minutes, the channels will enter Standby Mode. Note that the APD ON/OFF switch uses the first pole of the INPUT ROUTING DIP switch bank on Models CA2500, CA4250, CA6160 and CA8125; on Model CA2250 it uses SW3 of the single 8-pole DIP switch (APD ON/OFF). 9. REMOTE POWER DOWN a 2-pin, 5 mm-pitch screwterminal connector allowing remote control of the amplifier's Automatic Power Down (APD) function. A contact closure at this connector will force APD, placing the amplifier in Standby Mode, resulting in low power consumption. Note that the REMOTE POWER DOWN input is always operative, i.e., regardless of the setting of the AUTO POWER DOWN switch 8 . 10. Expansion bay for retrofitting an optional Dante® input card, Part Nos.: CDI-CA2 (2 channels), CDI-CA4 (4 channels) or CDI-CA8 (8 channels). 11. AC input standard IEC receptacle. Use the AC power cable supplied with the amplifier. 12. Ventilation exhausts - these should always be unobstructed when the amplifier is in use. 10 CA Series Installation & User Guide v1.0 Installation Mechanical The amplifiers are designed to be mounted in a standard 19" equipment rack. The front panel is fitted with rackmount ears for this purpose. All models require 2U of vertical rack space. See notes below regarding spacing and ventilation. Due to the units' weight, the use of rack side rails is recommended. Ventilation CA Series amplifiers are force cooled by an internal, thermostatically-controlled fan: temperature is sensed within the amplifiers' power output modules. The fan is inoperative at temperatures below 45 °C. Above this temperature its speed is determined by the hottest amplifier module and increases proportionately to a maximum speed when the highest module temperature reaches 56 °C. Note that the amplifier protection circuitry will operate at internal temperatures of 75 °C or above: see Amplifier Proctection for more details. Always allow adequate space around the amplifier to allow a free flow of air through the unit. Ensure that cable bundles or other items do not obstruct any vents.The airflow intake is at the front panel (filtered), with exits in the rear and left-hand side panels. It is recommended not to mix CA Series amplifiers with other equipment employing forced-air cooling which acts in the opposite direction within the same rack. CA Series amplifiers have been designed to operate in an ambient temperature range of 0 °C to 35 °C. While satisfactory operation outside of this recommended temperature range may be achievable in a particular installation, no guarantee can be given regarding full adherence to the performance specifications (see the Appendix section of this manual). Installers should always endeavour to fit the CA Series amplifier in a location where the recommended temperature range is not exceeded. Power requirements and turning the amplifier on and off Connect the CA Series amplifier to AC mains using the supplied IEC cable. The amplifier will operate on supply voltages from 85 to 265 V, 50 or 60 Hz. The amplifier will automatically power-up as soon as external power is applied; this ensures that it restarts correctly if the AC supply is interrupted. The front panel POWERED 2 , PROTECT 5 and PEAK 4 LEDs will illuminate briefly while internal diagnostics are conducted. The white LED integral with the power button will remain on after this sequence. The amplifier always powers-up into its active state, even if APD mode is enabled. CA Series amplifiers are highly energy efficient and have a two-stage Automatic Power Down (APD) feature. This puts odd and even channel groups into a reduced-power Mute state when no input signal to a group member channel has been detected for 15 minutes. (Actual power Clearly better sound 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 <2.5 W for all models. Note that APD mode may be disabled by setting the rear panel AUTO POWER DOWN switch [8] to OFF (up). The front panel power button to turn the amplifier off. 1 is a "soft" type; press Remote Power Down The amplifier may be "forced" into Standby Mode applying a short-circuit to the rear panel REMOTE POWER DOWN connector 9 . The connector is a 2-pin, 5 mm-pitch screwterminal type. The amplifier will "wake up" when the short-circuit is removed: wake-up time is typically 500 ms. This function can be useful in shutting down e.g., visitor attractions at museums and theme parks. REMOTE POWER DOWN is operational regardless of the setting of the AUTO POWER DOWN switch 8 . Amplifier Protection CA Series amplifiers' output stages incorporate comprehensive protection circuitry to prevent damage to loudspeakers, the output devices and other components in the event of a fault condition. The voltage and current at the output terminals of each channel is constantly monitored and the channel will enter Protection Mode and shut down if either DC or excessive current is detected. In this case, the relevant front panel PROTECT LED will illuminate. Power-cycling the amplifier by removing the IEC power connector and replacing it after 5 seconds will normally clear the fault condition, but if the PROTECT LED remains lit after the boot sequence, the amplifier may have developed a fault, and should be serviced. The internal temperature of the power modules is also constantly monitored, and if the temperature of an output module exceeds 75 °C, the channel will enter Protection Mode and the gain will be reduced by up to 3 dB: the front panel PROTECT LED 5 for the relevant channel will illuminate. If the temperature exceeds 85 °C, the protection circuitry will mute all amplifier channels, all PROTECT LEDs will be illuminated and all other LEDs off. A thermallyinduced protection state is normally an indication that the amplifier channel is being driven too hard, and reducing the input signal level will generally clear the fault. The protection circuitry is also activated immediately the amplifier is powered on. This is to prevent any voltage spikes due to start-up conditions from damaging the loudspeakers. The protection circuitry automatically times out after a short delay. All PROTECT LEDs illuminate at switch-on during the power-on sequence: this is normal. CA Series Installation & User Guide v1.0 11 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. To use the amplifier to its maximum effectiveness, installers wishing to use the high impedance output mode should have an understanding of how this maximum power figure is shared between channels. All models except the CA2250 use two separate internal power supplies, each rated at 500 W. The two supplies serve the odd- and even-numbered channels respectively. Each amplifier channel is capable of delivering 500 W, but this figure can only be realised if the other channels in its group (of odd or even-numbered channels) are unused. As other channels in the same group are called upon to deliver power, the maximum power available from any one channel is reduced. If all channels are simultaneously driven with equal input levels, and the LEVEL controls are adjusted to the same setting, the maximum, multi-channel power rating of the amplifiers can be stated as follows: · CA2500: 2 channels, 500 W/ch · CA4250: 4 channels, 250 W/ch · CA6160: 6 channels, 160 W/ch · CA8125: 8 channels, 125 W/ch The great advantage of the power sharing principle is that it allows installers to use some channels to drive speakers in areas where only low power is needed, and others for areas where more is needed. It should be apparent that the 2 channel CV2500 is somewhat independent of the power sharing principle, having only one odd and one even channel. Model CA2250: Model CA2250 uses a single internal power supply rated at 500 W, which serves both Channel 1 and Channel 2. Power sharing in high impedance mode is similarly available, but only up to a total amplifier output power of 500 W. Each channel is capable of delivering 500 W, but can only do so if the other channel is quiescent. If both channels are simultaneously driven with equal input levels, and the LEVEL controls are adjusted to the same setting, the maximum, two-channel power rating of the CA2250 can be stated as follows: · CA2250: 2 channels, 250 W/ch NOTE: The principle of Power Sharing only applies to amplifier channels selected to HIGH Z mode i.e., used with 70/100 V-line loudspeaker systems. For channels selected to LOW Z mode, the minimum speaker loads 4 or 8 ohms must be observed. In these cases, the power capability of the channel should be taken from the table below when calculating the remaining power available for other channels: MODEL CA2250 CA2500 CA4250 CA6160 CA8125 CHANNELS 2 2 4 6 8 POWER (low impedance mode) 2 X 250 W 2 X 500 W 4 X 250 W 6 X 160 W 8 x 125 W 12 CA Series Installation & User Guide v1.0 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. 123 scn cold (-) hot (+) INPUT: BALANCED CONNECTION 12 3 scn INPUT: UNBALANCED CONNECTION hot (+) Clearly better sound Input Routing In common with other Cloud power amplifiers, each amplifier channel can either be fed with a signal from its own input (the factory default setting), or with the signal feeding another channel. This allows the same input signal to feed several channels without the need for input connectors to be wired in parallel. CA Series amplifiers with fewer channels are obviously restricted in the range of routing options available in comparison with models with more channels. The rear panel INPUT ROUTING DIP switches 2 are used to select input source for each channel, except Channel 1. Models CA2500, CA4250, CA6160 and CA8125 have a dedicated DIP switch bank for input routing: Model CA2250 uses SW4 of the single 8-pole DIP switch. The factory default setting is with all input routing switches UP, which connects the input to each amplifier channel to the same-numbered input connector, as indicated on the upper row of numbers. Setting a switch DOWN parallels the input of that amplifier channel with the input of the amplifier channel indicated below the switch. Notes: · Pole 1 of the DIP switch on Models CA2500/4250/ 1610/8125 is not concerned with input routing. · SW4 of the single 8-pole DIP on Models CA2250 selects the input source for Channel 2 only Amplifier channel is fed from samenumbered input OFF 2 INPUT ROUTING CH INPUT SOURCE 345678 ON 1 1 2 1 2 1 2 AUTO POWER DOWN CA8125 Amplifier channel is fed with signal selected to channel indicated below OFF 2 INPUT ROUTING CH INPUT SOURCE 34 OFF CH2 Hi-Z/Lo-Z CH1 Hi-Z/Lo-Z CH2 4 /70V or 8 /100V INPUT CH1 4 /70V or 8 /100V CH2 INPUT ROUTING ROUTING 2 CH INPUT SOURCE APD ON/OFF CH2 65Hz HPF CH1 65Hz HPF OFF 2 INPUT ROUTING CH INPUT SOURCE 3456 ON 1 1 2 1 2 AUTO POWER DOWN CA6160 Hi-Z 4 / 70V CH2 OFF OFF OFF ON 1 1 2 AUTO POWER DOWN CA4250 ON 1 AUTO POWER DOWN CA2500 Lo-Z 8 / 100V CH1 ON ON ON CA2250 CA Series Installation & User Guide v1.0 13 Clearly better sound The input routing switches operate in the manner shown in the schematics below. INPUT ROUTING CH INPUT SOURCE OFF 2 3 4 5 6 CH2 Hi-Z/Lo-Z CH1 Hi-Z/Lo-Z CH2 4/70V or 8/100V CH1 4/70V or 8/100V CH2 INPUT ROUTING APD ON/OFF CH2 65Hz HPF CH1 65Hz HPF Hi-Z 4 / 70V CH2 OFF OFF OFF Lo-Z 8 / 100V CH1 ON ON ON INPUT 1 INPUT 2 CH1 SW2 CH2 CA2250 ON 1 1 2 1 2 AUTO POWER DOWN INPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 SW2 SW3 SW4 SW5 SW6 CA6160 INPUT ROUTING CH INPUT SOURCE OFF 2 3 4 5 6 7 8 CH1 CH2 CH3 CH4 CH5 CH6 INPUT ROUTING CH INPUT SOURCE OFF 2 ON 1 AUTO POWER DOWN INPUT 1 SW2 INPUT 2 CH1 CH2 CA2500 INPUT ROUTING CH INPUT SOURCE OFF 2 3 4 ON 1 1 2 AUTO POWER DOWN INPUT 1 SW2 INPUT 2 INPUT 3 INPUT 4 SW3 SW4 CA4250 CH1 CH2 CH3 CH4 ON 1 1 2 1 2 1 2 AUTO POWER DOWN INPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7 INPUT 8 SW2 SW3 SW4 SW5 SW7 SW6 SW8 CA8125 CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 For all CA Series models, the routing options may be summarised as follows: · all amplifier channels may be sourced by the same- numbered input · Channel 2 may be sourced from either Input 1 or Input 2 · odd-numbered channels from Channel 3 upwards may alternatively be sourced from Input 1 · even-numbered channels from Channel 4 upwards may alternatively be sourced with whichever input is selected for Channel 2 14 CA Series Installation & User Guide v1.0 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: - + TO SPEAKERS LO-Z: 4 OR 8 OHMS HIGH-Z: 70/100 V-LINE Never make connections to the output terminals while the amplifier is powered. The output stages of CA Series amplifiers can be configured to drive either high impedance loudspeaker distribution systems (70 V-line or 100 V-line), or low impedance loudspeakers (4 ohms or greater). The selection of output mode is made independently for each amplifier channel with the rear panel SPEAKER LOAD HIGH Z/LOW Z DIP switch 6 . On Models CA2500, CA4250, CA6160 and CA8125, this is a dedicated 2-, 4-, 6- or 8-pole switch: on Model CA2250, output mode selection is made using poles SW7 and SW8 of the single 8-pole DIP switch. (The first example shown below is for the 4-channel CA4250; the principle is identical across the range.) 70 V-line or 100 V-line operation SPEAKER LOAD HIGH Z 1234 ON 4 ohm or 8 ohm operation LO Z (CA4250) CH2 Hi-Z/Lo-Z CH1 Hi-Z/Lo-Z CH2 4/70V or 8/100V CH1 4/70V or 8/100V CH2 INPUT ROUTING APD ON/OFF CH2 65Hz HPF CH1 65Hz HPF Hi-Z 4 / 70V CH2 OFF OFF OFF 70 V-line or 100 V-line operation 123 4567 8 ON 4 ohm or 8 ohm operation Lo-Z 8 / 100V CH1 ON ON ON (CA2250) The output mode may be set independently for each channel. Set the switch UP for high impedance (70/100 V-line) operation and DOWN for low impedance operation. Clearly better sound 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 4/70V / 8/100V DIP switch 7 . On Models CA2500, CA4250, CA6160 and CA8125, this is a dedicated 2-, 4-, 6- or 8-pole switch: on Model CA2250, output mode selection is made using poles SW5 and SW6 of the single 8-pole DIP switch. (The first example shown below is for the 4-channel CA4250; the principle is identical across the range.) 70 V-line operation 4 / 70V 1234 ON 8 / 100V (CA4250) 100 V-line operation CH2 Hi-Z/Lo-Z CH1 Hi-Z/Lo-Z CH2 4 /70V or 8 /100V CH1 4 /70V or 8 /100V CH2 INPUT ROUTING APD ON/OFF CH2 65Hz HPF CH1 65Hz HPF Hi-Z 4 / 70V CH2 OFF OFF OFF 70 V-line operation 123 4567 8 ON 100 V-line operation Lo-Z 8 / 100V CH1 ON ON ON (CA2250) The voltage may be set independently for each channel. Set the switch UP for 70 V line operation and DOWN for 100 V line operation. In high impedance (70/100 V-line) mode, the transformerless output stage of each amplifier channel is designed to deliver a maximum of 500 W, as long as the other channels in the same odd- or even-numbered group (i.e., using the same internal power supply) are unloaded. When using multiple channels of a CA2500, CA4250, CA6160 or CA8125 amplifier, installers should ensure that the total loading on the oddnumbered channels does not exceed 500 W, and the total loading on the even-numbered channels, does not exceed 500 W. Model CA2250 uses a single power supply, and the total loading of both channels combined must not exceed 500 W. The wattage loading for each channel, can be calculated by adding together the tap wattage settings for all speakers connected to that channel. IMPORTANT: CA Series amplifier channels normally operate in a bridge configuration in both low and highimpedance modes: pairs of channels cannot be bridged externally to obtain a higher power output. CA Series Installation & User Guide v1.0 15 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 . On Models CA2500, CA4250, CA6160 and CA8125, this is a dedicated 2-, 4-, 6- or 8-pole switch: on Model CA2250, output mode selection is made using poles SW1 and SW2 of the single 8-pole DIP switch. (The first example shown below is for the 4-channel CA4250; the principle is identical across the range.) 65Hz FILTER OFF Filter off (flat response) 1234 ON ON (CA4250) Filter on (LF removed) CH2 Hi-Z/Lo-Z CH1 Hi-Z/Lo-Z CH2 4 /70V or 8 /100V CH1 4 /70V or 8 /100V CH2 INPUT ROUTING APD ON/OFF CH2 65Hz HPF CH1 65Hz HPF Hi-Z 4 / 70V CH2 OFF OFF OFF Filter off (flat response) 123 4567 8 ON Filter on (LF removed) Lo-Z 8 / 100V CH1 ON ON ON (CA2250) Low impedance operation In low-impedance mode, the output stage may be optimised for use with loads of either four or eight ohms with the SPEAKER LOAD 4 /70V / 8 /100V DIP switch 7 . In the 4 setting (switch UP) the load impedance must not be less than four ohms, and in the 8 setting (switch DOWN) the load impedance must not be less than eight ohms. However, higher impedances may be driven in both cases, though the maximum power output of the amplifier channel will not be available. Check the impedance of the loudspeakers to be driven by the amplifier; if using multiple loudspeakers, employ series/ parallel wiring as appropriate to ensure the combined impedance is not less than the impedance set with switch 7 . The power capability of an amplifier in low impedance mode should be taken to be the nominal channel power level for the particular amplifier model, assuming the load impedance matches that set by switch 7 . For example, a low-impedance channel of a CA8125 should be considered to be loading its power supply with 125W. Level Control Control of audio level in each channel is provided by the rear panel preset rotary LEVEL control 3 . It should be appreciated that this adjusts the signal level feeding the amplifier power stage and is thus essentially an output level control, not an input level or sensitivity control. The preset should be adjusted using a trim tool or small screwdriver. Zero output is obtained with the control fully anti-clockwise. Full output level is with the control fully clockwise; at this setting the maximum output power (70 Vrms or 100 Vrms in high impedance mode) will be produced for an input signal level of 0.775 Vrms (0 dBu). We recommend that the level for each channel should be set after installation is complete by commencing with the LEVEL controls at minimum. Installers should ensure that adequate, but not excessive sound levels are achieved with the programme material that will be used in practice. 16 CA Series Installation & User Guide v1.0 Technical Specifications Clearly better sound Performance Output Power: Outputs: Frequency Response: High Pass Filter: Distortion: Noise: Crosstalk: Inputs Connectors Sensitivity Input Impedance General Output connectors Power input Mains protection Normal operating temperature Power Consumption Standby & APD2 Mute3 Idle4 1/8th power5 1/3rd power6 Standby & APD2 Mute3 Heat loss Idle4 1/8th power5 1/3rd power6 Amplifier Protection Status Indicators Cooling Dimensions (W x H x D) Net Shipping Weight Net Shipping All Models CA2250: total output power 500 W, both channels CA2500/CA4250/CA6160/CA8125: total output power 1 kW, all channels1 Low-impedance: 4 ohms or 8 ohms (selectable) High-impedance: 70 V or 100 V (rms) 20 Hz to 20 kHz, +0 dB/-1 dB -3 dB @ 65 Hz via rear panel switches 0.019%THD+N @1 kHz, 1 dB below rated output -94 dBr, 22 Hz to 22 kHz, relative to full power Ch1 to Ch2: < -98 dB @1 kHz, -79 dB @10 kHz Other channel combinations: -107 dB @1 kHz, -98 dB @10 kHz (typical) 3-pole 3.5 mm-pitch plug-in screw-terminal connectors 0 dBu (0.775 Vrms) 10 kohms (balanced); 5 kohms (unbalanced) 2-pole 5 mm-pitch plug-in screw-terminal connectors 85 to 265 V AC, 50 to 60 Hz Internal fuses: CA2250: 1 x 250 V fuse, 20 x 5 mm, rating T4AH CA2500, CA4250, CA6160, CA8125: 2 x 250 V fuses, 20 x 5 mm, rating T4AH 0 °C to 35 °C (Note performance and specifications cannot be guaranteed outside this range) CA2250 CA2500 CA4250 CA6160 CA8125 0.795 W (12.43 VA) 1.919 W (24.29 VA) 1.925 W (23.77 VA) 2.284 W (23.55 VA) 2.353 W (23.77 VA) 11.24 W (21.09 VA) 17.87 W (36.85 VA) 22.37 W (41.97 VA) 26.87 W (48.15 VA) 25.91 W (48.7 VA) 17.07 W (28.13 VA) 24.33 W (43.6 VA) 33.72 W (53.87 VA) 43.45 W (66.54 VA) 53.8 W (78.77 VA) 88.33 W (105.8 VA) 165.1 W (193.5 VA) 170.0 W (192.3 VA) 170.2 W (205.8 VA) 183.5 W (219.8 VA) 200.9 W (213.5 VA) 388.0 W (415.4 VA) 391.0 W (416.0 VA) 378.5 W (403.5 VA) 387.5 W (411.8 VA) 2.9 kJ/hr (2.7 BTU/hr) 6.9 kJ/hr (6.6 BTU/hr) 6.9 kJ/hr (6.6 BTU/hr) 8.2 kJ/hr (7.8 BTU/hr) 8.5 kJ/hr (8.0 BTU/hr) 40.5 KJ/hr (38.4 BTU/hr) 64.3 kJ/hr (61.0 BTU/hr) 80.5 kJ/hr (76.4 BTU/hr) 96.7 kJ/hr (91.7 BTU/hr) 93.3 kJ/hr (88.5 BTU/hr) 61.5 kJ/hr (58.3 BTU/hr) 87.6 kJ/hr (83.1 BTU/hr) 121.4 kJ/hr (115.1 BTU/hr) 156.4 kJ/hr (148.3 BTU/hr) 193.7 kJ/hr (183.7 BTU/hr) 91.7 kJ/hr (87.0 BTU/hr) 108.3 kJ/hr (102.7 BTU/hr) 164.9 kJ/hr (156.4 BTU/hr) 179.5 kJ/hr (170.2 BTU/hr) 211.0 kJ/hr (200.1 BTU/hr) 122.5 kJ/hr (116.1 BTU/hr) 197.3 kJ/hr (187.1 BTU/hr) 210.0 kJ/hr (199.1 BTU/hr) 211.3 kJ/hr (200.4 BTU/hr) 242.7 kJ/hr (230.2 BTU/hr) Overcurrent DC Thermal monitoring Switch-on delay Power applied, Protection active, Signal peak, and Signal present Variable speed fan CA2250: 482.6 mm x 88 mm x 231.3 mm (19 in x 3.46 in x 9.11 in) CA2500, CA4250, CA6160, CA8125: 482.6 mm x 88 mm x 381.8 mm (19 in x 3.46 in x 15.03 in) CA2250: tbc CA2500, CA4250, CA6160, CA8125: 606 mm x 164 mm x 558 mm (23.9 in x 6.5 in x 22 in) CA2250 CA2500 CA4250 CA6160 CA8125 4.50 kg (10.1 lb) 6.75 kg (15.1 lb) 7.10 kg (15.9 lb) 7.55 kg (16.9lb) 7.95 kg (17.8 lb) tbc 8.75 kg (19.6 lb) 9.10 kg (20.4 lb) 9.55 kg (21.4 lb) 9.95 kg (22.3 lb) CA Series Installation & User Guide v1.0 17 Clearly better sound NOTES 1. 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. Notes re Power Consumption and Heat Loss measurements: All measurements at 230 VAC 50 Hz power input 2. Standby: amplifier in Standby and APD states (i.e., after 25 mins of no input) 3. Mute: amplifier in Mute state (i.e., after 15 mins of no input) 4. Idle: amplifier not in standby state, but no audio output 5. 1/8th power: constant sound level at 1/8 of the rated output power (audio mainly clean, only occasional clipping) 6. 1/3rd power: constant sound level at 1/3 of the rated output power (audio beginning to become compressed, limited or heavily clipped) 18 CA Series Installation & User Guide v1.0 www.cloud.co.uk www.cloudusa.pro3-Heights™ PDF Toolbox API 6.12.0.6 (http://www -tools.com) Adobe InDesign 15.0 (Macintosh)