PreSonus DigiTUBE - Manual (Page 6)

4
2 CONTROLS & OPERATION
2.1 FRONT PANEL
The front panel of the DigiTUBE contains:
GAIN (dB) LOW MID HIGH
EQ
IN
MIC/INSTRUMENT
LINE
POWER
-42 -36 -30 -24 -18 -12 -6 -3 0 3 6 9 12 15 18 24
OUTPUT LEVEL (dBu)
2k
900 5k
120
30 1k
0
-12 +12
5k
3k 15k
0
-12 +12
DRIVE
TUBE PREAMP EQUALIZER
24
3 48
5
0 10
80Hz 48V
PAD/
LINE
-12 +12
0
FREQ LEVEL
The front panel of the DigiTUBE is divided into two sections: the tube preamp
controls are located on the left hand side of the unit’s front panel and the
equalizer section is on the right.
2.1.1 TUBE PREAMP SECTION
Neutrik™ Combo Microphone (XLR) / Instrument (1⁄4”) Input
Drive Control
Pad/Line Switch
Gain Control (3dB - 48dB)
+48V Phantom Power Switch
Mic/Line/Instrument Input
The DigiTUBE has a Neutrik™ combo connector which provides both an XLR and
a 1⁄4” TS input. The XLR connector can accept microphones or by engaging the
PAD/LINE switch, line level signals. The 1⁄4” input is for instrument level signals
only. If you wish to adapt a line level device with a 1⁄4” connector, An XLR
connector with pins 1 and 3 tied together for ground and the hot connected to
pin 2 must be made. This adapts the unbalanced line level cable to input signal
via the XLR input and the PAD/LINE switch to convert the input to accept a line
level signal.
Drive
The DRIVE potentiometer controls how much signal
is routed through the 12AX7 vacuum tube. The effect
achieved by this procedure can be subtle to extreme,
depending on the setting being used. A ‘warming up’
of the sound can be noticed at lower settings. This
effect can be used to compensate for the harsh-
ness commonly encountered in digital signals with
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