Ecler HZA4-70F User Manual

Contents

63.3. Signal input connectionsThe amplifier HZA4-70F features 4 balanced and line level analog signal inputs (one peramplification channel) on its rear panel.Signal input connectors are 3 positionscrew terminal block (40, 41, 43, 45). The wiringis:HOT or direct signal > Pin +COLD or inverted signal > Pin -GROUND > Pin For unbalanced connection short-circuitpin  to pin -.STACK outputs (42, 44) available for inputs 1 and 2 are parallel to the input and serve to re-sendthe signal of these inputs (INPUTS, CH1 / CH2) to other input channels, amplifiers or sound systems.The input impedance is 20K (balanced) with a nominal input sensitivity of 0dBV(1V). Thisimpedance makes possible to parallel several amplifiers without loosing audio quality.3.4. Output connections and channel linking with the FLEXIPOWER functionThe rear panel OUTPUTS section is fitted with two position screw terminal block (28, 29, 30, 31)for each amplifier channel. Always respect the relative polarity for outputs (0 and 100 on each outputconnector), wiring and speakers.The FLEXIPOWER Function: a MERGE switch is installed between each pair of outputconnectors: When the switch is in the top position, the pair of channels has an independent behaviour; theFLEXIPOWER function will not be active When the switch is in the lower position (MERGE), the two channels will be linked and theirindividual power will be added:o The two outputs of the pair of channels and the speaker lines connected to thesechannels will be connected in parallelo The MERGE LED (6, 11, 16) light on the front panel, between the pair of channels, willbe lito The audio content of the pair of channels becomes the sound source connected to theinput of the channel with a lower number (input 1 for channel pair 1&2, input 2 forchannel pair 2&3, input 3 for channel pair 3&4)o The active front and remote volume control (if used) of the channel pair becomes thatof the channel with a lower number (controls on channel 1 for channel pair 1&2,controls on channel 2 for channel pair 2&3, controls on channel 3 for channel pair3&4)2, 3 or 4 adjacent channels can be linked (with a resulting double, triple or quadruple power), with thefollowing sound source and volume control arrangement:Independent 1 & 2 2 & 3 3 & 4 1 & 2 & 3 2 & 3 & 4 1 & 2 & 3 & 4CHANNEL 1 IN 1 IN1 IN1 IN1CHANNEL 2 IN 2 IN2CHANNEL 3 IN 3 IN3CHANNEL 4 IN 4 IN4 IN4 IN4M ERGED CHANNELSFLEXIPOW ER inputs routing and associated volum e controlsIN1IN2IN3IN1IN2 IN1