Rane PEQ 55 Operator's Manual - page 2
Manual-2
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). Settings 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 pro-
vided 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 detent. 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.
∞
∞
∞
∞
2
oct
dB
1
.5
1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6
6
-24
BYPASS
GAIN
BW
x1
x10
x0.1
FREQUENCY
A2
OL
∞
∞
∞
∞
2
oct
dB
1
.5
1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6
6
-24
BYPASS
GAIN
BW
LOW SHELF
x1
x10
x0.1
FREQUENCY
A1
OL
∞
∞
∞
∞
2
oct
dB
1
.5
1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6
6
-24
BYPASS
GAIN
BW
HIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
∞
∞
∞
∞
∞
∞
6
6
+
+
0
0
LOW
MID HIGH
TONE
∞
∞
∞
∞
20k
7k
14k
5k
10k
15
120
30
240
60
LOW HIGH
CUT FILTERS
-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,
Low Off,
Mid
Mid ‘0’,
Hi Off
Hi Off
Low
Low ‘0’, Mid +6, Hi
, Mid +6, Hi ‘0’
Low
Low ‘0’,
Mid Off,
Mid Off,
Hi
Hi ‘0’
Low +6, Mid
Low +6, Mid ‘0’, Hi +6
, 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