Parametric Equaliser
The equaliser can be switched between two different sets of
curves, one based on the G Series equaliser and one based on
the latest version of the classic E Series EQ.
HF Section:
Comprises a shelving filter with variable cutoff frequency and
a boost/cut control. This is switchable to a shallower curve by
selecting the ‘
E
’ switch. Selecting
BELL
in either mode
switches the filter to a peaking curve.
HMF Section:
Continuously variable Q (filter width), gain (±20dB) and centre
frequency controls (600Hz-7kHz).
LMF Section:
Continuously variable Q (filter width), gain (±20dB) and centre
frequency (200Hz to 2.5kHz) controls.
In normal operation, the HMF and LMF bands of the equaliser
have continuously variable bandwidth (Q). This is calculated
as the ratio of gain/bandwidth so that as the gain is decreased
the bandwidth increases. When the equaliser is switched to ‘
E
’
operation, the bandwidth remains constant at all gains, so at
lower gains the EQ curves are narrower for a given Q setting.
LF Section:
Comprises a shelving filter with variable cutoff frequency and
boost/cut control. This is switchable to a shallower curve by
selecting the ‘
E
’ switch. Selecting
BELL
in either mode
switches the filter to a peaking curve.
The SL911 Input/Output Module
3-7
8.9.94
BELL
BELL
IN
MON
E
IN
CH
OUT
DYN SC
SPLT
IN
KHz
dB
HMF
dB
Q
KHz
LMF
dB
Q
KHz
LF
dB
Hz
+
+
0
1 5
16
6
7
+
2
2 5
0
+
0
30
450
Pull for EXP
KHz
FILTERS
Hz
HF
OUT
350
3
OUT
INSERT
KEY
PRE
0
EQ
OVERLOAD
Summary of Contents for SL 9000 J SERIES
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