PreSonus DigiTUBE - Manual (Page 4)

1 OVERVIEW
2
1.2 FEATURES
The following is a summary of your DigiTUBE’s features:
Dual Servo Gain Stage
Your DigiTUBE contains a dual servo gain stage (no capacitors). This design
provides ultra low noise performance and wide dynamic control. The DigiTUBE
can boost the desirable signal without increasing unwanted background noise.
Mic/Instrument/Line Input
The DigiTUBE has a Neutrik™ combo (XLR & 1⁄4”) connector. The XLR input can
be used for microphone signals and phantom power is available for condenser
mics when the 48V switch is engaged. The XLR will also accept line level signals
when the PAD/LINE switch is engaged. The 1⁄4” input will accept instrument level
signals, only. The PAD/LINE switch has no effect on the 1⁄4” input and it should
be understood that the 1⁄4” input is not designed to accept line level signals.
Pad/Line
A switch on the front panel may be used to engage a -20dB pad for mic level
signals or change the XLR input operating level from mic to line. Using the -
20dB pad provides a more manageable signal from high output devices giving
the operator greater control over the incoming signal and a much reduced
chance of over-driving the input, thereby avoiding distortion.
48V
The DigiTUBE has 48V phantom power available. Phantom power assures
optimum performance from your condenser microphone without the need of
an external power supply. A 80Hz switch is provided on the front panel of the
DigiTUBE that enables the user to insert an 80Hz filter. Often referred to as a
rumble filter, this feature is useful for eliminating bothersome low-end sounds
such as air conditioning noise without greatly altering the desired audio.
Parametric Equalizer
The equalizer section is equipped with three dual concentric potentiometers
The outer control selects the frequency and the inner control boosts/cuts the
selected frequency. The EQ controls are LOW, MID, HI from left to right. The
bandwidths are broad enough and have enough overlap to allow a very effective
contour of the incoming audio signal.