Presonus ADL 700 User Manual download pdf (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

2 Hookup

2.1 Input Controls

ADL 700

Owner’s Manual

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Presonus ADL 700 User Manual Page 7