Rane PEQ 55 User manual

Manual-1
PEQ 55
PARAMETRIC EQUALIZER
OPERATORS MANUAL
WEAR PARTS: This product contains no wear parts.
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
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60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
Quick Start
Everyone knows how to use a parametric equalizer right? You set the filter GAIN to its maximum and turn the FRE-
QUENCY control until you find a pesky resonance that, when excited by a few extra dB, blows up your speaker or causes
permanent hearing damage to the listening audience. There. Problem solved. What did you say?
Connect the PEQ’s Inputs and Outputs to virtually any type of audio device using XLR, ¼" TRS or Euroblock connec-
tors. You may use any combination of Outputs simultaneously if desired, but don’t try to save a few bucks by plugging
multiple sources into the Inputs and expecting them to mix — they won’t. It will simply sound bad and no amount of EQ
will fix it. Polarity convention on the XLR jacks is pin 2 positive, pin 3 negative and pin 1 shield (chassis ground).
With the wiring out of the way it’s time to polish your golden ears and start making adjustments. Fire up some music
and adjust the input and output LEVELs for good headroom and optimum signal-to-noise. Always heed the OL (overload)
indicator! And check to make sure the channel BYPASS/EQ and individual filter BYPASS switches are properly engaged,
and that the FREQUENCY multiplier switch (x0.1, x1, x10) is in the desired position.
Filter bands A1 and B1 feature a switchable LOW SHELF response. Bands A5 and B5 feature a switchable HIGH
SHELF response. Further flavor the mix using the channel TONE controls and CUT FILTERS.
The PEQ’s A/B switches are an especially unique feature. Understand their use and you’ll unlock some of the device’s
analog-controlled digital magic. Misunderstand their use and you’re in for a few surprises. Repeat after me: either audio
channel can follow either set of filters, as set by the A/B switch.
For example, in normal dual 5-BAND mode set the top row switch to A(the Left channel), and the bottom row switch
to B(the Right channel). These switches also affect the CUT FILTERS, TONE controls and LEVELS.
Or perhaps you want to equalize both sides of a stereo system identically using one set of controls. Set both switches to
Aand now the top row of filters controls both audio channels. Set both switches to B and use the bottom row of filters to
create a totally different EQ curve. Do an A/B comparison of the two curves by toggling the (you guessed it) A/B switches.
Try doing that with an analog EQ.
Need more filters? Switch to 10-BAND mode and you now have ten fully overlapping filters to use on a stereo or mono
source. The outputs mute momentarily when switching between 5- and 10-BAND modes.
Contents
Quick Start ................................................................................................................................................................... 1
Controls and Operation ............................................................................................................................................ 2
Rear Panel Connections ........................................................................................................................................... 4
Applications ................................................................................................................................................................. 4
Dual Mono 5-Band Operation .............................................................................................................................. 4
Linked Stereo 5-Band Operation ........................................................................................................................ 5
Mono or Linked Stereo 10-Band Operation .................................................................................................... 5
Inserting the PEQ 55 on an Instrument Channel or Group Output ........................................................... 6
Using the A / B Controls to Switch Between Two Different EQ Settings ............................................... 6
PEQ 55 Settings Templates ..................................................................................................................................... 7
Additional Resources ................................................................................................................................................ 8

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, 2nd-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
2nd-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
octdB
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
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
OL
∞∞
∞∞
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
∞
∞
∞
∞
∞∞
66
++
00
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 20k50 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 20k50 100 200 500 1k 2k 5k 10k
Hz
-40
+10
-35
-30
-25
-20
-15
-10
-5
0
+5
20 20k50 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 20k50 100 200 500 1k 2k 5k 10k
Hz
d
b
u

Manual-3
In and Out Level controls
LEVEL controls serve three purposes, with the assistance of the In and Out Meters:
1. Adjust the IN signal level for good headroom and signal-to-noise.
2. Adjust the OUT signal level to compensate for changes in signal level due to filter boost/
cut settings.
3. Adjust sensitivity. The operation of the OUT LEVEL control is reversed from the IN
LEVEL. Pushing the control up reduces gain. Pushing the control down increases the gain.
To easily adjust sensitivity without affecting the output signal level, grasp the IN and OUT
controls and move them together. Only the A-channel IN and OUT LEVELs are active in
10-BAND mode.
In and Out Meters
IN and OUT Meters are peak responding and indicate signal level in dBu. Peak-dBu is
held and displayed for 2 seconds. Attack is instantaneous. Decay is 500 ms for a 20 dB step.
A and B meters remain active in linked 10-band mode.
EQ Bypass
BYPASS switches have two modes of operation. If the rear panel
switch is set to BYPASS ALL, all filters and level controls are by-
passed. If this switch is set to BYPASS FILTERS, only the filters are
bypassed. Filters include Parametric, Tone and Cut. An automatic relay
bypass hardwires the Inputs to the Outputs when the POWER is off.
A / B control switches
A / B switches determine which set of controls is used by channel A and channel B. There
is a 100 ms mute to allow the filters to settle when the position of the A/B control switch is
changed. The only control not affected by the A / B switches is BYPASS. A / B control
switches allow:
• Independent, dual mono operation
• A/B setting comparison
• 5-Band linked stereo operation (A or B controls affect both channels)
• Two “analog memories”
See the Applications section for example uses of the A / B switches.
10-Band mode / 5-Band mode
The 10-BAND / 5-BAND switch is located on channel A. In 5-BAND mode, the PEQ 55
provides two independent 5-band parametric equalizers. A or B controls may be used to
control each channel as described above. In 10-BAND mode, both channels are stereo linked
and operation is as follows:
1. All 10 filters affect both A and B Outputs. This arrangement permits mono or stereo
linked operation.
2. Meters remain independent and active for both channels.
3. Channel A and B BYPASS switches remain active.
4. A1 LOW SHELF and B5 HIGH SHELF modes are available.
(A5 high-shelf and B1 low-shelf filter modes are disabled.)
5. Channel A TONE, CUT FILTERS and LEVEL controls are active.
(Channel B tone, cut-filter and level controls are disabled.)
6. A / B control switches are inactive.
7. The Outputs mute for 200 ms when switching between 10-BAND and 5-BAND modes.
∞∞
∞∞
12
12
12
12
0
+
0
+
IN OUT
LEVEL
∞∞
∞∞
+6-12 -6 -3 0 +3
+
+6-12 -6 -3 0 +3
+
POWER
BEQ 5-BAND
10-BANDBYPASS
A
BEQ
BYPASS A
FILTERSALL
BYPASS
(rear panel switch)
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
∞∞
∞∞
+12 OL
OUT
IN
∞∞
∞∞
+12 OL
OUT
IN
The active control surface for 10-BAND mode. Inactive controls are in gray.

Manual-4
Rear Panel Connections
Channel A and B INPUTS
Plug the outputs of the mixer or other source to these Inputs. Choose only one type of connector — the ¼" TRS, XLR, and
Euroblock do not sum. Note: In agreement with IEC and AES/ANSI standards, wiring convention is pin 2 positive, pin 3 is
negative (return), pin 1 is shield chassis ground. Refer to the Sound Sytem Interconnection RaneNote, supplied with this
manual, for correct wiring to other connectors or unbalanced devices.
Channel A and B OUTPUTS
Connect these to the Inputs of an amplifier or mixer. The Outputs may be used simultaneously to drive different devices at
once. All Outputs are balanced and follow the same “pin 2 hot” convention as the Inputs.
Power connector
The PEQ 55 uses a universal internal switching power supply that accepts 100 to 240 VAC at 50 to 60 Hz, allowing it to
work in most countries. The line cord attaches to a standard IEC appliance inlet. A US line cord is shipped with each unit.
FILTERSALL
+ -
ACN 001 345 482
100-240V
50/60 Hz 20 WATTS
PEQ 55
MADE IN U.S.A.
RANE CORP.
FOR CONTINUED
GROUNDING
PROTECTION
DO NOT REMOVE
SCREW This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
+ - + - + -
+ - + - + - + -
WIRING
TIP / PIN 2 = POSITIVE
RING / PIN 3 = NEGATIVE
SLEEVE = SIGNAL GROUND
PIN 1 = CHASSIS GROUND
OUTPUT B
BYPASS
OUTPUT A INPUT B INPUT A
LISTED
COMMERCIAL
AUDIO
EQUIPMENT
24TJ
R
CUS
U.S. and International Patents Pending
Mix Left
To crossovers, amplifiers, speakers 5-BAND mode is selected.
Output A uses the A set of controls.
Output B uses the B set of controls.
Mix Right
From Mixing Console
INPUT A INPUT B
OUTPUT A OUTPUT B
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
APPLICATIONS
Dual Mono 5-Band Operation

Manual-5
Linked Stereo 5-Band Operation
Mix Left
To crossovers, amplifiers, speakers
5-BAND mode
is selected.
...both channels
can use the B
set of controls.
Both channels can
use the A set of
controls OR...
Mix Right
From Mixing Console
INPUT A INPUT B
OUTPUT A OUTPUT B
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
To crossovers, amplifiers, speakers 10-BAND mode is selected.
A / B switches have no effect.
Connect for linked stereo operation
From Mixing Console
INPUT A INPUT B
OUTPUT A OUTPUT B
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
Mono or Linked Stereo 10-Band Operation

Manual-6
To crossovers, amplifiers, speakers
5-BAND mode
is selected.
...then switch to
the B set of
controls for a
second EQ
setting.
Use the A set of
controls for one
EQ setting...
From Mixing Console
Connect
INPUT B
for Linked Stereo
5-Band Operation
INPUT A
OUTPUT A OUTPUT B
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
5-BAND mode is selected.
Output A uses the A set of controls.
Output B uses the B set of controls.
Send
Mixing Console
INPUT A
Return
OUTPUT A
Send
INPUT B
Return
OUTPUT B
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12
12
12
12
12
12
12
12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/ 12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL
CUT FILTERSTONE LEVEL
A
BEQ
OUT
IN
BYPASS
A
B
OL
OL
BYPASS
GAIN BWLOW SHELF
x1
x10
x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
A5
OL
OL
BYPASS
GAIN BWHIGH SHELF
x1
x10
x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A2
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A3
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
A4
OL
OL
BYPASS
GAIN BW
x1
x10
x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
+6-12 -6 -3 0 +3 +12 OL
+6-12 -6 -3 0 +3 +12 OL
PEQ 55
POWER
BEQ 5-BAND
OUT
IN
10-BANDBYPASS
A
A
BEQ
OUT
IN
BYPASS
A
B
Important:
See the Sound Sytem Interconnection
RaneNote (included with this manual)
for information about connecting
balanced and unbalanced equipment.
If your mixer uses TRS Insert jacks (unbalanced), we
recommend using cable wired as shown below.
1-CONDUCTOR SHIELDED CABLE
1-CONDUCTOR SHIELDED CABLE
T = SEND
R = RETURN
S = SHIELD
RED RED SEND
RETURN
RED RED
R
SHIELD SHIELD
Ring = No connection
Ring & Sleeve = Both tied to Shield
SHIELD
T T
T
R
Inserting the PEQ 55 on an Instrument Channel or Group Output
Using the A / B Controls to Switch Between Two Different EQ Settings

Manual-7
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12 12
12 12
12 12
12 12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1 x10 x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ
5-BAND
OUT IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL CUT FILTERSTONE LEVEL
A
BEQ
OUT IN
BYPASS
A
B
OL OL
BYPASS
GAIN BWLOW SHELF
x1 x10 x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1 x10 x0.1
FREQUENCY
A5
OL OL
BYPASS
GAIN BWHIGH SHELF
x1 x10 x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A2
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A3
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A4
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B4
PARAMETRIC
EQUALIZER
∞
∞
∞
∞
∞
∞
∞
∞
66
20k
7k
14k
5k
10k
15
120
30
240
60
66
20k
7k
14k
5k
10k
15
120
30
240
60
+6-12 -6 -3 0 +3 +12 OL
12 12
12 12
12 12
12 12
++
0
+
0
+
00
++
0
+
0
+
00
+6-12 -6 -3 0 +3 +12 OL
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
2
octdB
1
.5 1.5
Hz
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
2
1
.5 1.5
125
500
250
2k
1k
1
/
12
12
0
-6 6
-24
octdB
Hz
PEQ 55
BYPASS
GAIN BWLOW SHELF
x1 x10 x0.1
FREQUENCY
A1
LOW MID HIGH LOW HIGH IN OUT
POWER
BEQ
5-BAND
OUT IN
10-BANDBYPASS
A
CUT FILTERSTONE LEVEL CUT FILTERSTONE LEVEL
A
BEQ
OUT IN
BYPASS
A
B
OL OL
BYPASS
GAIN BWLOW SHELF
x1 x10 x0.1
FREQUENCY
B1
BYPASS
GAIN BWHIGH SHELF
x1 x10 x0.1
FREQUENCY
A5
OL OL
BYPASS
GAIN BWHIGH SHELF
x1 x10 x0.1
FREQUENCY
B5
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A2
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B2
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A3
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B3
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
A4
OL OL
BYPASS
GAIN BW
x1 x10 x0.1
FREQUENCY
B4
Get out your crayons! Use these templates to keep a record of valuable settings. Additional templates may be downloaded at www.rane.com/peq55.html.
PEQ 55 Settings Templates

Manual-8
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107397
Additional Resources
Unless you truly have golden ears, most people have a hard time knowing exactly where to set each control. Luckily there
are several computer-based tools available to help.
Goldline
The TEF20 performs Time, Energy and Frequency measurements using the science of Time Delay Spectrometry (TDS)
www.gold-line.com/tef/tef.htm
Sia Software Company
SmaartLive and SIA Acoustic Tools sound system measurement, acoustic analysis and real-time control software.
www.siasoft.com
Terrasonde
The Audio Toolbox combines test procedures and acoustic analysis functions in a handy little package.
www.terrasonde.com