PreSonus DigiTUBE - Manual (Page 8)

6
2 CONTROLS & OPERATION
Low
The LOW control is a dual concentric potentiometer
with the outer ring allowing the selected frequency to
be boost or cut by as much as twelve decibels. The
straight up, twelve o’clock, position is labeled zero
(0). When the outer control knob is in this position,
no effect is exerted on the signal, regardless of what
frequency is selected with the inner controller. Rotating the outer control knob
to the left or counter-clockwise reduces the selected frequency. Rotating the
outer controller to the right or clockwise increases the selected frequency. The
inner control knob selects the frequency. The LOW EQ control goes from 30Hz
to 1kHz. The control frequency is narrower to the fully counter-clockwise or left
side. As the inner control is rotated clockwise, the frequency bandwidth is much
more broadly defined.
For example, from the fully counter-clockwise position of 30Hz to the first mark
represents a difference of 10Hz - 15Hz whereas from fully clockwise or 1kHz to
the first marked position back represents as much as a 100Hz difference. The
significance of this to the operator is that a movement of the frequency selector
from a fully counter-clockwise position to approximately the twelve o’clock
position represents smaller incremental frequency changes compared to the fre-
quency changes that occur when the selector travels clockwise past the twelve
o’clock position and beyond.
120
30 1k
0
-12 +12
LE
SS
M
O
R
E
1 2
3
Input
Phantom power is available through the XLR input of the
DigiTUBE. This 48V of phantom power is for condensor mics
and/or any other devices that may require it via XLR inputs.
PIN 1 = GND
PIN 2 = + (+48V)
PIN 3 = - (+48V)
2.1.2 EQUALIZER SECTION
Low (30Hz - 1kHz) +/- 12dB
Mid (900Hz - 5kHz) +/-12dB
High (3kHz - 15kHz) +/-12dB
80Hz Switch
EQ IN Switch