INSTALLATION
AC Mains Supply.
The unit is fitted with an internationally approved 3 pin IEC connector. A mating
socket with power cord is provided with the unit, wired as follows:
Brown: Live.
Blue: Neutral.
Green/Yellow: Earth (Ground).
All mains wiring should be performed by a qualified electrician with all power
switched off, and the earth connection must be used.
Before connecting the unit to the supply, check that the voltage selector switch on the
rear panel is correctly set. The unit may be set for 115V (accepting voltages in the
range 110V to 120V, 60Hz AC), or to 230V (for voltages in the range 220V to 240V,
50Hz AC). Adjustment to the operating voltage should be made by sliding the selector
switch left or right with a small screwdriver until the desired voltage is displayed. The
mains fuse required is 20mm anti-surge, 1AT rated at 250V. If it ever necessary to
replace the fuse, only the same type and rating must be used. The power consumption
of the equipment is 30VA.
Warning:
attempted operation on the wrong voltage setting, or with an
incorrect fuse, will invalidate the warranty.
Audio Operating Level.
The equaliser is equipped with inputs and outputs suitable for connection to a wide
variety of other audio equipment. Generally, the balanced XLR connections will be
required for interfacing to other professional equipment, where the operating level
(line-up level or nominal level) will be +4dBu, or about 1.2V rms. The unbalanced
jack connectors are generally intended for interfacing to semi-professional equipment
and have an operating level of -10dBu, or about 225mV rms.
The equaliser may be used to change between operating levels, for example by
connecting the unbalanced output of a semi-pro mixing console to the equaliser’s
unbalanced input, and taking the balanced output of the equaliser to the balanced input
of a tape machine at +4dBu. All inputs and outputs of the equaliser may be used
simultaneously if required. Balanced interconnection is always preferable to obtain the
best headroom and noise rejection, but can only be used if the other equipment in the
chain, e.g. the mixing console, also has provision for balanced connections.
Audio Inputs.
