Parametric Equaliser - Solid State Logic SL 9000 J Series Operator's Manual

Pull for EXP
IN
CH
OUT
FILTERS
OUT
3
KHz
DYN SC
350
OUT
Hz
HF
0
BELL
+
dB
HMF
0
1 5 16
KHz
+
dB
6 7
KHz
KEY
Q
INSERT PRE
LMF 0
IN
+
dB
2 2 5
KHz
Q
LF
0
30 450
Hz
BELL
+
dB
EQ
MON SPLT E
IN
OVERLOAD
8.9.94

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