Symetrix 551E, Руководство пользователя

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5
551E
552E
/
Cut/Boost Knob
This control delivers up to 12 dB
of boost or 20 dB of cut at the
frequency selected by the
frequency control and range
switch. See Diagram 5.
Note: We’ve provided a wide
range on this knob to
help you take care of the
occasional drastic prob-
lem, but you’ll get better
results from this (or any)
EQ if you use this control
in moderation.
Diagram 3 - High cut filter
with 12 dB
per octave.
Figure 4 - Front panel view of one EQ band.
AUDIO PRECISION 551E vs 23 MAY 96 10:54:00
-20.00
-15.00
-10.00
-5.000
0.0
5.0000
10.000
15.000
20.000
AMPL(dBu)
20 100 1k 10k 20k
FREQ(Hz)
BAND 1
(Hz) (OCT)
BANDWIDTH FREQUENCY CUT/BOOST
(dB)
+12
850
1.5K
-20 2.0 .05 2K
140
X1
X0.1
X10
100
350
1.0 0
Bandwidth
This knob determines how wide an area the
band will affect, hence the term bandwidth.
The knob is calibrated in terms of octaves. The
range is .05 (1/20th) to 2 octaves. Use the .05
setting for notch filter applications and the 1.0-
2.0 range for “tone control” type sweetening.
Diagram 5 - Typical Cut/Boost curve.
AUDIO PRECISION 551E vs 23 MAY 96 10:01:21
-20.00
-15.00
-10.00
-5.000
0.0
5.0000
10.000
15.000
20.000
AMPL(dBu)
20 100 1k 10k 20k
FREQ(Hz)
High Cut Filter
Diagram 3 illustrates a 12dB
per octave high frequency
roll-off filter. The range of
this control is 3kHz to
65kHz.
EQ Controls