Manual- controls and operation – Rane PEQ 55 User Manual
Page 4
Manual-
Controls and Operation
Parametric filter controls
GAIN
: Range is +12 dB to -24 dB, with a 0 dB center detent.
BW (bandwidth)
: Range is
1
/
12
to 2 octaves with each dot representing ¼ octave.
FREQUENCY
: Total range is 12.5 Hz to 20 kHz, with the multiplier switch.
Each Hz multiplier covers a 4 octave range:
x0.1
operates from 12.5 Hz to 200 Hz
x1
operates from 125 Hz to 2 kHz
x10
operates from 1.25 kHz to 20 kHz
Individual switches BYPASS each filter without affecting the others.
Individual OL (overload) warning indicators light at 0 dBFS (digital clipping).
Low Shelf
Filters A1 and B1 include a LOW SHELF
mode. When the LOW SHELF switch is in, the
yellow indicator is lit and the filter is in LOW
SHELF mode. Filter B1 LOW SHELF mode is
disabled in 10-BAND mode. The BW control has
no effect in LOW SHELF mode. The minimum
Low Shelf frequency is 25 Hz (0.1 multiplier). Set-
tings below 25 Hz default to 25 Hz.
High Shelf
Filters A5 and B5 include a HIGH SHELF
mode. When the HIGH SHELF switch is in, the
yellow indicator is lit and the filter is in HIGH
SHELF mode. Filter A5 HIGH SHELF mode is
disabled in 10-BAND mode. The BW control has
no effect in HIGH SHELF mode.
Tone controls
Independent, 3-band TONE controls are
provided for each channel. The Low-Mid cutoff
is 300 Hz. The Mid-High cutoff is 4 kHz. These
Tone controls are enhanced, 2
nd
-order filters. The
HIGH and LOW filters are shelving. Phase shift
is zero degrees with the controls at their center de-
tent. Only the A-channel Tone controls are active
in 10-BAND mode.
Cut Filters
2
nd
-order Butterworth LOW- and HIGH-
CUT FILTERS
are provided for each channel.
The range of the LOW-CUT Filter is 15 Hz to
240 Hz. The range of the HIGH-CUT Filter is 5
kHz to 20 kHz. Only the A-channel controls are
active in 10-BAND mode.
-24
+14
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
+2
+4
+6
+8
+10
+12
d
B
u
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-24
+14
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
+2
+4
+6
+8
+10
+12
d
B
u
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-40
+10
-35
-30
-25
-20
-15
-10
-5
0
+5
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
d
b
u
Low Off,
Mid ‘0’,
Hi Off
Low ‘0’, Mid +6, Hi ‘0’
Low ‘0’,
Mid Off,
Hi ‘0’
Low +6, Mid ‘0’, Hi +6
Low Off,
Mid ‘0’,
Hi Off
Low ‘0’, Mid +6, Hi ‘0’
Low ‘0’,
Mid Off,
Hi ‘0’
Low +6, Mid ‘0’, Hi +6
-40
+10
-35
-30
-25
-20
-15
-10
-5
0
+5
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
d
b
u