- Pin 2 = Signal Phase (“+” or “hot”),
- Pin 3 = Signal Non-Phase (“-” or “cold”).
If an unbalanced output is required, pins 1 and 3 should both be connected to ground.
Nominal Output Level.
A switch on the rear panel allows the output to be matched to equipment at a nominal
operating level of +4dBu or -10dBu. Most professional equipment re4dBu
(approximately 1.2V rms), but some small mixing consoles, portable tape recorders
or domestic audio equipment require -10dBu (approximately 225mV rms). The
switch should be set to the position which results in the best signal to noise ratio,
whilst preserving sufficient headroom.
Unbalanced Outputs.
An unbalanced line output is provided for each channel, on a 0.25” mono jack socket.
- Tip = Signal Phase (“+” or “hot”).
- Screen = Ground.
Ventilation.
The unit generates a small amount of heat internally, mainly due to the valve heaters.
This heat should be allowed to dissipate by convection through the grill in the front
panel, which must not be obstructed. Do not locate the EQ unit where it will be
subject to external heating, for example, in the hot air flow from a power amplifier or
on a radiator.
The EQ may be free standing, or mounted in a standard 19” rack.
Rear Panel.
The rear panel connectors are identified in fig.2.
