User manual ELECTRO-VOICE CARDYNE I DATASHEET
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Manual abstract: user guide ELECTRO-VOICE CARDYNE IDATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly obeyed. All instructions concerning the handling of MOS - circuits have to be observed.
SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)
DESCRIPTION First of all, we would like to express our thanks and at the same time congratulate you on the decision to buy one of our CONTRACTOR PRECISION SERIES power amplifiers. ElectroVoice CONTRACTOR PRECISION SERIES amplifiers are made to meet the highest requirements of any CONTRACTOR application. Thus they provide on-board protection against thermal and capacitive overload, short-circuit and the occurrence of HF or DC at the output. [. . . ] Additionally, special circuitry prevents the output-stage transistors from being damaged by Back-EMF. During soft start, delayed switching of the power outputs is accomplished via relays and a limiter controls the initial current inrush, preventing the mains fuse from being blown during the power-on operation. The mechanical construction as well is carried out following the highest precision standards of the industry. The extensive comparator circuitry constantly monitors the input and output signals and activates the internal limiters whenever a non-linear operational state is encountered. This provides reliable protection of the connected loudspeaker systems against overload and clipping. The sound quality of the CONTRACTOR PRECISON SERIES power amplifiers is superb. Using comprehensive dimensioned power supply units with low-interference toroidal transformers gains a headroom that exceeds the nominal power handling capacity by far. No V/I-Foldback-Limiter circuits are employed within the power amplifiers, making it possible to operate the amps on complex loads up to ±90° phase angles without a problem. The electronically balanced inputs are provided via XLR-type and PHOENIX connectors which are also used to loop the signal through. In case of thermal overload you have to wait until the power amplifier returns into normal operation mode.
5. To eliminate unwanted noise and knacks in the connected speaker systems, loudspeaker output switching is performed delayed via relays. An initial current inrush limiter prevents the mains fuse from being blown during power-on.
POWER AMPLIFIER INPUTS "PHOENIX"-type connectors are provided parallel to the XLR-type inputs, offering the opportunity to feed additional power amplifiers with identical signals. The inputs are electronically balanced with pin-assignment according to the IEC 268 standard. Pin-assignment of the XLR-type input connectors: PIN 1: PIN 2: PIN 3: SHIELD a, + b, -
Pin-assignment of the "PHOENIX"type connectors:
Input sensitivity is factory set to 1Vrms.
LEVEL CONTROLS dB-scaled potentiometers for the adjustment of the power amplifier's overall amplification. These controls should be set between 0 dB and 6 dB, depending on the output of the connected signal source device e. The printed scale shows the actual amount of damping in the amplification of the power amplifier.
INPUT ROUTING PARALLEL MONAURAL Setting the selector switch to the PARALLEL/MONO position puts the channel A and channel B inputs in electrically direct parallel configuration, leaving you with the opportunity to individually control the channels' level settings by the use of the output controls A and B. DUAL STEREO When the selector switch is set to its DUAL/STEREO position both channels are amplified separately.
POWER AMPLIFIER OUTPUTS The power amplifier's channel A (left) and channel B (right) outputs are carried out on 4-POLE-BARRIER-STRIP connectors. Please, mind the correct polarity when connecting loudspeaker systems, according to the shown diagram for the DUAL OUTPUT. [. . . ] DUAL STEREO When the selector switch is set to its DUAL/STEREO position both channels are amplified separately.
POWER AMPLIFIER OUTPUTS The power amplifier's channel A (left) and channel B (right) outputs are carried out on 4-POLE-BARRIER-STRIP connectors. Please, mind the correct polarity when connecting loudspeaker systems, according to the shown diagram for the DUAL OUTPUT. Dangerously high voltages may be present at the binding posts, which, after establishing loudspeaker cable connections, makes closing the terminal strip's cover lid absolutely mandatory.
BRIDGED MODE When the bridged mode switch is engaged you will have to use the channel A input. The signal gets internally inverted and fed to the channel B power amp. [. . . ]
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