Electrocompaniet REC4.5 - Manual (Page 6)

Connecting to the power amplifier:
Single-ended (normal) output and operation
Use the + RCA on right and left channel for connection to the power amplifier.
Balanced XLR output and operation
The balanced mode can only be used if the power amplifier has a balanced input.
Use an XLR interconnect with GND on pin 1, + on pin 2 and - on pin 3.
Balanced RCA output and operation
The balanced mode can only be used if the power amplifier has a balanced input. Be
sure the power amplifier is turned off. Use 2 single (1 stereo) interconnect cables from
the preamplifier to the power amplifier, connecting + and - outputs from the preamplifier
to the
+ and - inputs of the corresponding channel on the power amplifier.
Make sure the + and - are not interchanged, as this will cause the system to operate
out of phase, with very poor bass response as a result.
NEVER use shorting plugs on any output terminal i.e. Rec. out or main out.
How to avoid noise problems
The EC 4 1/2 preamplifier contains circuitry that may be sensitive to magnetic fields.
The unit should be placed well away from transformers etc. Care should also be taken
in routing all signal cables. Do not run signal cables in parallel with speaker or AC
cables ( mains).
Keep cables as short as possible.
If the unit is placed on top of a power amplifier, leave at least 4" ( 10cm) of space
between the two units.
Switches and controls
The power on/off switch is located at the left side of the face plate.The balanced/ single
selector is located at the right side of the faceplate, this button selects either the single
RCA input or the balanced XLR output. The output signal will remain balanced
unaffected by this switch. The volume knob is located at the left side of centre and the
balance knob at the right side of center.The volume and balance functions can be
remote controlled from the ECT1 handset. The four push buttons on ECT1 controls
volume up/down and balance left/ right.