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Rane ME60S Equalizer Data Sheet
DATA SHEET
ME60S
microGRAPHIC EQUALIZER
General Description
The Rane ME60S Stereo Constant-Q Equalizer is a twochannel, 1/3-octave design, housed in a two rack-space unit. It
features a Range switch for high slider resolution in the ±6 dB
mode, equivalent resolution to 45 mm sliders found on larger
models. The ±12 dB mode provides a wide range of control over
system audio.
The ME60S evolved by combining two ME 30 equalizers
in one unit and then embellishing with two adjustable bandlimiting filters on the low and high end. Though consuming only
12 watts of power, a Power switch is added to the ME60S (the
ME 30S consumes 7 watts and does not have a Power switch).
The active filter sections feature Rane’s innovative constant-Q
(constant bandwidth) design. Constant-Q means the bandwidth
of each individual filter is guaranteed to be narrow enough to
prevent unwarranted interaction between filters, yet wide enough
to produce exactly the type of correction curve demanded
by even the most unusual acoustic surroundings. This differs
dramatically from conventional designs of the past, encumbered
with the unfortunate characteristic of changing bandwidth when
changing boost/cut amounts.
The adjustable filters are useful to band limit the audio
signal. For instance, restricting high frequencies to match the
incoming signal usually produces the most quiet system. And
a common use for the Low Cut Filter is limiting the signal going to 70-volt speaker systems. Often low frequencies saturate
the loudspeaker transformers. Restricting these signals greatly
improves system intelligibility. Full bandwidth use requires positioning both sliders to their lower limits. This effectively removes
the filters and guarantees 20-20 kHz ±0.5 dB performance.
Front panel controls and indicators include an overall rotary
Level control for each channel as well as Overload indicators.
Passive pushbutton Bypass switches feature LED indicators,
avoiding ambiguity by being on when the unit is Bypassed. (A
passive Bypass switch requires no power to operate. This allows
completion of the audio path should power fail in the ME60S.)
Inputs and Outputs are electronically balanced designs,
capable of unbalanced operation when required. They accept
and drive all possible signal levels into normal load impedances.
Balanced applications choose between the XLR or ¼" TipRing-Sleeve connectors. Unbalanced sources also may tie to the
ME 60S through mono ¼" connectors (no ring connection).
Features
•
•
•
•
•
•
Constant-Q Bandwidth Design
Overall Level Controls
20 mm Filter Slide Controls
±6 dB or ±12 dB Slider Range
Sweepable Low & High Cut Filters
Passive Bypass Switches
•
•
•
•
•
Grounded Center Detents at 0 dB
Infrasonic, Ultrasonic, & RFI Filters
Fully Balanced XLR Inputs and Outputs
¼" TRS Balanced/Unbalanced Inputs and Outputs
Universal internal switching power supply (100-240 VAC)
Data Sheet-1
ME60S
microGRAPHIC EQUALIZER
Features & Specifications
Parameter
Equalizer:
..........Channels
..........Bands
..........Type
..........Accuracy
..........Travel
..........Range
Inputs:
..........Connectors
..........Impedance
..........Maximum Level
Outputs:
..........Connectors
..........Impedance
..........Maximum Level
Overall Gain Range
RFI Filters
Passive Bypass Switches
Overload LED Threshold
Low Cut Filter
High Cut Filter
Frequency Response
THD & Noise
IM Distortion (SMPTE)
Signal-to-Noise Ratio
Channel Separation
Common Mode Rejection
Maximum Power
Universal Line Voltage
Unit: Conformity
Unit: Construction
..........Size
..........Weight
Shipping:
..........Size
..........Weight
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Specification
Two
(2x30) 1/3-Octave ISO Spacing
Constant-Q
3
20
±12 or ±6
Active Balanced/Unbalanced
XLR and ¼" TRS
>20k Balanced
+21
Active Balanced/Unbalanced
XLR and ¼" TRS
400 Balanced
200 Unbalanced
+21 Balanced
+15 Unbalanced
+19 Balanced
+13 Unbalanced
Off to +8 (Balanced Out)
Yes
Yes
4
10-250 Hz, 12 dB/octave
3k-40 kHz, 12 dB/octave
20-20 kHz
10-40 kHz
0.008
0.005
re +20 dBu
re +4 dBu
112
96
75
46
12
100-240 VAC, 50/60 Hz
CE, FCC, CULUS
All Steel
3.5" H x 19" W x 8.5" D (2U)
9 lb
4.25" x 20.3" x 13.75"
12 lb
Limit
Units
Conditions/Comments
From 25 Hz to 20 kHz
1
%
mm
dB
1%
1
Ω
dBu
1%
1
1
min
Ω
dBu
dBu
dB
1
3%
3%
±0.5
+0/-3
.002
.003
dB
Hz
Hz
dB
dB
%
%
2
3
1
dB
dB
dB
W
VAC
Center frequency
Positive grounded center detent
Switch selectable
2 kΩ
600 Ω
Sliders centered
Below clipping
Butterworth
+4 dBu, 20-20 kHz
60 Hz / 7 kHz, 4:1, +4 dBu
20 kHz noise BW; balanced out
Sliders centered, unity gain
1 kHz
1 kHz
12W
(8.9 cm x 48.3 cm x 21.6 cm)
(4.1 kg)
(10.8 cm x 52 cm x 35 cm)
(5.0 kg)
ME60S
microGRAPHIC EQUALIZER
Block Diagram
2
1
3
OVERLOAD
(+)
(+)
OL
SENSE
(–)
–6 dB
CHANNEL 1
INPUTS
RFI
FILTER
LOW CUT
FILTER
HIGH CUT
FILTER
0 dB
2
1
3
(–)
–12 dB
+6 dB
RANGE
+12 dB
–
BOOST
AMPLIFIER
CUT
AMPLIFIER
CHANNEL1
OUTPUTS
+
BYPASS
SWITCH
(10-250 Hz) (3k-40k Hz)
25 Hz
BP
LEVEL
BYPASS
TO FILTERS
Channel 1 is shown, channel 2 is identical.
Constant-Q:
3dB
Constant-Q
3dB
AMPLITUDE
1/3 octave
3dB
1/3 octave
3dB
1/3+ octave
Bandwidth, defined 3dB down
from peak, remains constant.
2+ octaves
Bandwidth here changes
dramatically with changes in gain.
FREQUENCY
Constant-Q:
Proportional Q:
This design has little
interaction as a
single slider is
2
moved from
1 to 2.
AMPLITUDE
Constant-Q graphic equalizers arose from
the sound professional’s need for greater
control with less interaction than previously possible with conventional equalizers. You use a constant-Q graphic the
same way you use a conventional graphic.
You just get the desired results quicker,
with far less after adjustment to the adjacent sliders.
The accompanying figures dramatically show the advantages of constant-Q
designs. For more technical information,
consult the references on the next page.
Most are available at
www.rane.com/library.html.
Proportional Q:
Both filters are
affected when a
single slider is
2
moved from
1 to 2.
1
+6dB
+3dB
0dB
1
2
2
1
1
FREQUENCY
Data Sheet-3
ME60S
microGRAPHIC EQUALIZER
Rear Panel
Architectural Specifications
The graphic equalizer shall be a two channel model of constantQ design to minimize interactions between adjacent bands,
and shall occupy two rack spaces (2U). Each channel shall have
thirty (30) frequency bands located on standard ISO center
frequencies. Each band shall have a bandwidth of 1/3-octave. A
switchable boost/cut range of 12 dB or 6 dB shall be provided.
A detented and positively grounded 0 dB point shall be provided
on 20 mm linear sliders with dust dams.
Low and high cut filters shall be provided with 12 dB/octave
slopes and adjustable corner frequencies. A rotary overall level
control shall be provided for each channel with a range from off
to +8 dB of gain when used in balanced mode. The unit shall
provide a passive bypass feature for each channel requiring no
power to operate. LED indicators shall be provided to indicate
boost/cut range, overload and bypass conditions.
The inputs and outputs shall be active balanced/unbalanced
designs terminated with XLR and ¼" TRS (tip-ring-sleeve) connectors. RFI, infrasonic and ultrasonic filters shall be provided.
The unit shall incorporate a front panel power switch. The
unit shall be capable of operation by means of its own built-in
universal power supply operating at 100-240 VAC and meet CE
requirements. The unit shall be UL and cUL listed. The unit
shall be entirely constructed from cold-rolled steel.
The unit shall be a Rane Corporation ME60S microGraphic
Equalizer.
Available Accessories
• SC 3.5 Security Cover
References
1. D. Bohn, “Constant-Q Graphic Equalizers,” RaneNote, (1982).
2. D. Bohn, “A New Generation of Filters,” Sound and Video Contractor, vol. 2, pp. 36-39 (Feb. 1984).
3. T. Pennington, “Constant-Q,” Studio Sound, vol.27, pp. 82-85 (Oct. 1985).
4. D. Bohn, “Constant-Q Graphic Equalizers,” J. Audio Eng. Soc., vol. 34, pp. 611-626 (September 1986).
5. D. Bohn, “Exposing Equalizer Mythology,” RaneNote, (1986).
6. D. Bohn, “Operater Adjustable Equalizers,” RaneNote, (1990).
Most of these documents may be found at our website, www.rane.com/library.html
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
Data Sheet-4
All features & specifications subject to change without notice. 1-2015
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