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threeQ Controls at a Glance
PREAMP GAIN - sets the amount of audio amplification. Too little gain
and the sound will be too quiet; too much and the signal could become
distorted.
PEAK LED - lights 6dB below clipping.
LINE switch - selects the Line (jack) input instead of the Mic (XLR) input.
The LED lights when active.
COMPRESS - sets the level of signal (or “Threshold”) above which the
signal starts to be compressed.
ATTACK - sets how quickly the compressor responds to peaks above
threshold.
RELEASE - sets the time during which the signal returns to its normal size
after compression. In general, the longer the time, the less obvious the
compression.
COMPRESSION METER - 4-Led bargraph indicates the amount of gain
reduction in dB, which is taking place at any given moment.
COMP switch - turns the compressor on. The LED lights when active.
LF - controls the volume of Low Frequencies or “Bass” in the audio spectrum.
15dB of boost or cut is available around 80Hz.
MID - controls the middle frequencies in the audio spectrum. 15dB of
boost or cut is available at the selected frequency.
MID FREQ - sets the frequency at which the MID control operates,
anywhere from 300Hz to 5kHz.
HF - controls the volume of the High Frequencies or “Treble” in the
audio spectrum. 15dB of boost or cut is available around 12KHz.
EQ switch - turns the equalizer on. The LED lights when active.
OUTPUT GAIN - is the volume control or “Fader” for the outputs of the
threeQ.
VU METER - 8-Led bargraph shows the output signal level in dB at
any given moment.
48V PHANTOM POWER switch - when pressed in, feeds 48V phan-
tom power to the microphone XLR connector. Most condenser type
microphones require phantom power to operate.
+4dBu/-10dBv switch - selects the output operating level of the threeQ,
either to the professional +4dBu level, or to the -10dBv semi pro level.
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