Allen&Heath Qu-16 - Manual (Page 23)

Qu Mixer User Guide 23 AP9372 iss.4
Preamp
An analogue preamplifier (‘head amp’) matches each
connected microphone or line signal to the operating
level of the console before it gets converted to digital
to be processed and mixed with the other channels.
Source lets you choose one of four sources as the
input to the channel:
Local – Mic/Line sockets on the Qu rear panel.
dSNK – Remote preamps via dSNAKE.
Qu-Drv – Playback from USB hard drive.
USB B – Audio streaming from a Mac computer.
Press the Fn key to open the Source screen.
Touch the CH buttons to highlight those you
wish to change. Select the source from the list.
Channel Preamp source
Local (red Gain) – Rear panel Mic/Line sockets
feeding the internal Qu mixer preamps. These are pad-
less preamps featuring wide gain range.
dSNAKE (yellow Gain) – Remote preamps located in
an AudioRack on stage or other remote location and
connected to the Qu dSNAKE port via a Cat5 cable.
The AudioRack preamps include 20dB Pad switching.
Channel USB source
Qu-Drive source (blue Gain) – Stereo or multitrack
playback from a USB hard drive plugged into the top
panel Qu-Drive port. Provides a +/-24dB Trim control.
USB B source (blue Gain) – Multi-channel streaming
from a Mac computer via the rear panel USB B port.
Provides a +/-24dB Trim control.
The panel USB Select key in the SuperStrip switches
between the current Preamp source (Local or
dSNAKE) and the current USB source (Qu-Drive or
USB B).
Phantom Power
Turn on 48V if the connected device requires phantom
power, for example a condenser microphone or active
DI box. Touch and hold for 1 second to toggle on or
off. This prevents accidental operation.
Note - To prevent audible thumps make sure the
channel is muted before switching 48V on or off. Do
not plug or unplug sources while phantom power is
on.
Gain
Choose either Qu-Drive or USB (affects all channels)
Local (red Gain) dSNAKE (yellow Gain)
Qu-Drive (dark blue Gain) USB B (Light blue Gain)