User Manual
Allen & Heath    20   ZED-4 BUS User Guide 
STEREO INPUT CHANNEL 
STEREO Channel EQ 
The EQ on the stereo Channel is 4 band, fixed frequency and com-
prises  a  shelving  high  frequency  section,  a  shelving  low  frequency 
section and two fixed mid frequency controls. 
6 
7 
-15 +15
HF
12k
-15
HM
+15
2k5
-15
LM
+15
250Hz
-15
LF
+15
80Hz
EQ IN
20.00 Hz 100.00 1000.00 10000.00 30000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
STEREO HF EQ 
STEREO LF EQ 
10.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
10.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
STEREO LMF AND HMF EQ 
EQ IN 
The EQ IN switch enables the 
equaliser  when  pushed  in.  The 
EQ is  bypassed when  the switch 
is in its up position. 
6 
7 










