PreSonus ADL 700 - Manual (Page 7)

2 Hookup
2.1 Input Controls
Input Source Select. The Input Source Select switch allows you to choose among all
signal sources that you have connected to the ADL 700 inputs. It patches the selected
input through the signal chain, completely bypassing the other two inputs. The Input
Source Select switch also provides a choice of four mic-input impedances: 1500Ω,
900Ω, 300Ω, and 150Ω.
Power User Tip: The output of your microphone and the input of any microphone preamp each
have a specific impedance. Measured in ohms, impedance is a way of expressing a circuit’s opposition
to a signal attempting to pass through. Lowering or raising the ADL 700 mic-input impedance can
create subtle coloring and filtering effects, enabling you to get a wider variety of tonalities without
using the EQ. In general, lower input impedance can produce effects that simulate a “darker,” or
more “closed-in” tone. Higher input impedance will produce a “brighter,” or more “open” tone.
Gain. This 8-position rotary switch provides 35 dB of gain in 5 dB increments.
Trim. This variable potentiometer (±10 dB) allows you to make fine trim adjustments
to the final preamp stage of the ADL 700 input.
+48V. The 48-volt phantom power, supplied by way of the XLR input, provides power
for condenser microphones and other devices requiring continuous power. This
power is supplied at a constant level to prevent any signal degradation.
WARNING: Phantom power is only required for condenser micro phones and
can severely damage dynamic mics, especially ribbon mics. Therefore, switch
phantom power off for all channels where it is not required.
XLR connector wiring for phantom power
Pin 1=Ground
Pin 2=+48V
Pin 3=+48V
3
2 Hookup
2.1
Input Controls
ADL 700
Owner’s Manual