Allen & Heath 21 XB-14 MK2 User Guide
STEREO INPUT CHANNELS ST1 & ST2
ST1 Inputs
Standard 1/4” jack sockets for input signals to ST1 L & R inputs.
Wired Tip=Hot(+), Ring=cold (-), Sleeve=Chassis.
Fully balanced. Nominal input level = 0dBu.
ST2 Inputs
Standard RCA phono sockets for ST2 L & R inputs.
Unbalanced. Nominal input level = 0dBu.
Stereo source selector switch
Selects either ST1 or ST2 stereo inputs to the stereo channel ST1.
Allows the user to select between multiple stereo sources connected to
the XB-14.
A green LED will illuminate to show which input is selected.
FOR CLARITY ONLY ST1 CHANNEL IS DESCRIBED HERE
Stereo input level controls
For adjustment of the stereo input levels from fully attenuated to +15dB
of gain.
Stereo channel EQ
The stereo channel EQ is 2 band with corner frequencies of 12kHz for
the HF and 80Hz for the LF.
1 0 . 0 0 H z
1 0 0 . 0 0
1 0 0 0 . 0 0
1 0 0 0 0 . 0 0
3 0 0 0 0 . 0 0
- 2 0 . 0 0
- 1 5 . 0 0
- 1 0 . 0 0
- 5 . 0 0
0 . 0 0
5 . 0 0
1 0 . 0 0
1 5 . 0 0
2 0 . 0 0
d B r
AUX
This control sends a signal to an auxiliary bus. The signal is sourced pre-
fade or post-fade depending on the PRE switch position and is a com-
bined sum of the left and right stereo signals. The pre-fade source selec-
tion will be affected by the channel ON/OFF switch if active. The send
control varies the signal level to the bus from off (fully attenuated) to
+6dB, with unity gain at the arrow.
ST2
1/2
-15
+ 15
12kHz
HF
-15
+ 15
80Hz
LF
ST1
ST2
L
R
ST1
L/M
R
O
O
+ 6
PRE
ST1
ST2
BUS
AUX
MIX B
+ 15
0
5
-15
+ 15
0
5
-15
MIX B
The MIX B switch routes the channel signal to a stereo bus which is inde-
pendent of the main PGM (program) and audition buses. The signal is post-
fade and follows the PAN control.
