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SWITCHING ON
Allow this unit a few minutes for the tubes to warm up before use. It is not
recommended that you leave your preamplifier permanently switched on. This only
wastes electricity and tube life. Your preamplifier has solid state rectification and will
reach peak operating condition in approximately 30 minutes.
TUBE LIFE
As with all tubes, their quality degrades with age. This is due to cathode emission, a
natural process found in all tubes. We recommend that you have your preamplifier
checked every 4-5 years, depending on usage, usually the preamplifier will require
re-tubing after this time has elapsed.
Increased noise is usually a sign that the tubes need replacing.
1. PAD
It's a -20dB resistive pad, it can accomodate some line level signals to be
amplified by the unit.
2. 48V PHANTOM
Pressing this button, the microphone at the input will be supplied with the
standard 48V Phantom Supply, the mic can easily draw up to 10-15mA of current
without problems. This button MUST remain unswitched if you are using dynamic
and ribbon type microphones. Do not use phantom with unbalanced sources,
damage to the mic or preamp may result. Do not change mics or mic patches with
phantom power on especially if the monitors are up.
3. PHASE REV.
Activating this button, the original phase on the respective input connector will be
reversed.
4. LEVEL
There are 11 steps, 0 being cut-off, 10 being max volume. Each step increases by
approximately 2.5dB .
The VU meters display the "average" of the output signal, the standard indication
is +8dBu (1.947Vrms) for a 0 VU reading. +4dBu reading is at 50% scale.
OPERATION
CONTROLS
METERING
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