Ecler HZA4-70F User Manual

Page 6

STACK outputs (42, 44) available for inputs 1 and 2 are parallel to the input and serve to re-send

the 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). This

impedance makes possible to parallel several amplifiers without loosing audio quality.

3.4. Output connections and channel linking with the FLEXIPOWER function

The 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 output
connector), wiring and speakers.

The FLEXIPOWER Function: a MERGE switch is installed between each pair of output

connectors:



When the switch is in the top position, the pair of channels has an independent behaviour; the
FLEXIPOWER function will not be active



When the switch is in the lower position (MERGE), the two channels will be linked and their
individual power will be added:

o The two outputs of the pair of channels and the speaker lines connected to these

channels will be connected in parallel

o The

MERGE LED (6, 11, 16) light on the front panel, between the pair of channels, will

be lit

o The audio content of the pair of channels becomes the sound source connected to the

input of the channel with a lower number (input 1 for channel pair 1&2, input 2 for
channel 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 that

of 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 pair
3&4)

PRECAUTION: DO NOT MANIPULATE THE “MERGE” SWITCHES WHEN THE AMPLIFIER
IS SWITCHED ON

2, 3 or 4 adjacent channels can be linked (with a resulting double, triple or quadruple power), with the
following sound source and volume control arrangement:

Independent

1 & 2

2 & 3

3 & 4

1 & 2 & 3

2 & 3 & 4

1 & 2 & 3 & 4

CHANNEL 1

IN 1

IN1

CHANNEL 2

IN 2

IN2

CHANNEL 3

IN 3

IN3

CHANNEL 4

IN 4

IN4

M ERGED CHANNELS

FLEXIPOW ER inputs routing and associated volum e controls

IN1

IN2

IN3

IN1

IN2

IN1