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Stereo Input Module
Equaliser
The stereo EQ section is four band, with switched-frequency
shelving high and low
frequency sections, and two fixedfrequency peaking mid sections.
10
The HF section has cut or boost of 15dB and a shelving response. The
frequency is normally 12kHz, but may be reduced to 6kHz by the 6K switch.
11
The HIGH MID (HMF) section has maximum cut or boost of 15dB at a fixed
frequency of 3kHz, with a Q of 1.4.
12
The LOW MID (LMF) section has maximum cut or boost of 15dB at a fixed
frequency of 600Hz, with a Q of 1.4.
13
The LF section has maximum cut or boost of l5dB and a shelving response.
The frequency is normally 60Hz, but may be increased to l 20Hz by the 120 switch.
Frequency Response of the Filters
d8
► G-MO
SAchon
20.0
I
150
I
10 0
--+-+-+;++--;---;-+++,,-
-50
-10 0
--'--t-c-H+-\---t-c---ic+'++t---'i.--i-+ft-t-H--
-150
-200
20
d8
HF
Section
f.
I
Iii
tOO
tk
,...,....,..,
10k
20k
20
·
0
l
:
t · , ·;
I
J
I
i: \
15.0
---i
-+--<--~--i
10 0
-·+
··I-----+---+--+
20k
dU
U-
Sectlorl
20.0
-to.a
""' ,..
1k
10k
20k
14
The EQ section is switched in by the EQ switch. An integral green LED is
illuminated when the EQ section is in circuit.
Insert Point
Circuitry is fitted for a stereo insert point. The insert send and return sockets arc not
fitted as standard; however the signals are available on 0.1" connectors on the
module.
The insert uses ground-compensated sends and electronically balanced returns at a
nominal level of -2dBu. Push-on jumpers allow the insert to be set prc-EQ or
post-EQ, or to be bypassed completely. The default is set to by-passed.
27
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