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5
SETUP
Installation
Install the unit on a plane surface or in your rack. For 19" (483 mm) rack installation, 1 unit is required. When
mounting the unit into the rack, please make sure that there is enough space around the unit so that the
heated air can be passed on. Steady overheating will damage your unit. You can fix the unit with four screws
M6 in the rack.
Making the Connections
Disconnect the equalizer from the mains and switch off the units to be connected before making or changing
the connections.
1)
The equalizer can be inserted as required, e. g. between preamplifier and power amplifier, between
mixer and power amplifier or into an effect way of a mixer. Make the audio connections via XLR or
6.3 mm jacks according to application needs. Both types of connectors for the inputs and outputs can
be used for balanced or unbalanced connections. Balanced cables provide +6 dB more output and
guarantee a better protection against interference in case of long cable runs.
2)
The equalizer has an input impedance of 20 kΩ balanced and 15 kΩ unbalanced. This makes the audio
inputs suitable for use with any low-impedance source. Caution: The use of more than one input
connector at a time could unbalance balanced lines, cause phase cancellation, short a conductor to
ground or cause damage to the equipment connected.
3)
The equalizer's audio output is capable of driving a 600 Ω load to +18 dBu. More than one output may
be used simultaneously if the combined parallel load is greater than 600 Ω.
4)
Finally connect the unit to a mains outlet with the mains cable. Before plugging the unit in, always make
sure that the power supply matches the product specification voltage.
5)
Always make sure that your power amplifiers are the last item turned on and the first turned off.
Operation
1)
Prior to switching on set all sliding controls to center position and the LEVEL control to the left stop
position to avoid a high volume at the beginning. Then switch on the equalizer with the POWER switch.
The power indicator lights up.
2)
Feed an input signal to the equalizer and adjust the level with the LEVEL control. If one of the CLIP
indicators lights up, reduct the level of channel accordingly.
3)
Adjust the desired sound for the master signal with the silding controls. To boost a frequency range, pull
the sliding control upward; to attenuate, pull the sliding control downward. When in center position, the
particular frequency range is not processed at all.
4)
The BYPASS button disables and enables the equalizer section and thus allows comparing the
processed signal with the original unprocessed signal. When the button is depressed the equalizer
settings are disabled and the LED below the button lights up as a control.
5)
The RANGE button switches over the control range of the equalizer controls from ±6 dB to ±12 dB. At
first reduce audio levels at the power amplifiers when changing the setting of this switch as it may
generate an audible transient.
6)
If an interfering hum noise can be heard without a music signal, a ground loop may be the reason for
this. Then set the groundlift selector switch to the LIFT position. Thus signal ground and housing ground
are separated.
7)
After operation, switch off the unit with the power switch. The power indicator goes off.
17
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