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Rane ME15S Micrographic Equalizer Datasheet
DATA SHEET
ME15S
microGRAPHIC EQUALIZER
General Description
The Rane ME15S microGraphic Equalizer is a two-channel,
2/3-octave design with 20 mm sliders in a single 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 double
rack-space models. The ±12 dB mode provides a wide range of
control over system audio.
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.
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 ME 60S.)
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" Tip-RingSleeve balanced connectors. Unbalanced sources also may tie to
the ME15S through mono ¼" connectors (no ring connection).
Features
•
•
•
•
•
Constant-Q Bandwidth Design
Overall Level Control
20 mm Filter Slide Controls
±6 dB or ±12 dB Slider Range
Passive Bypass Switch
•
•
•
•
•
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
ME15S
microGRAPHIC EQUALIZER
Features and Specifications
Parameter
Equalizer:
..........Bands
..........Type
..........Accuracy
..........Travel
..........Range
Inputs: Type
..........Connectors
..........Impedance
..........Maximum Level
Outputs: Type
..........Connectors
..........Impedance
..........Maximum Level
Specification
Channel Separation
Common Mode Rejection
Unit: Conformity
..........Universal Line Voltage
..........Maximum Power
(15) 2/3-octave ISO spacing
Constant-Q
3
20
±12 or ±6
Active balanced/unbalanced
XLR & ¼" TRS
20k balanced; 10k unbalanced
20
Active balanced/unbalanced
XLR & ¼" TRS
400 balanced
200 unbalanced
+20 balanced
+15 unbalanced
+19 balanced
+13 unbalanced
Off to +0 (unbalanced output)
Off to +6 (balanced output)
Yes
Yes
4
20 Hz, 18 dB/octave, Butterworth
20-100 kHz
0.011
0.01
re +20 dBu
+4 dBu
107
91
92
76
104
88
85
40
CE, FCC, CULUS
100-240
7
..........Construction
..........Size
..........Weight
Shipping: Size
..........Weight
All steel
1.75" H x 19" W x 5.25" D (1U)
5 lb
4.25" x 20.3" x 13.75"
8 lb
Overall Gain Range
RFI Filters
Passive Bypass Switches
LED Thresholds: Overload
Infrasonic Filter
Frequency Response
THD+Noise
IM Distortion (SMPTE)
Signal-to-Noise Ratio
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Limit
Units
Conditions/Comments
From 25 Hz to 16 kHz
1
%
mm
dB
min
1
Ω
dBu
1%
1
1
min
min
Ω
dBu
dBu
dB
dB
1
3%
+0/-3
max
max
dB
Hz
dB
%
%
2
2
2
min
1
dB
dB
dB
dB
dB
VAC
W
Center frequency
Positive grounded center detent
Switch selectable
2 kΩ
600 Ω
Sliders centered
Sliders centered
Below clipping
+4 dBu, 20-20 kHz, 20k BW
60 Hz/7 kHz, 4:1, +4 dBu
20 kHz noise bandwidth
Sliders centered, unity gain, balanced
Full boost, unity gain, balanced
Full cut, unity gain, balanced
1 kHz
1 kHz
50/60 Hz
(4.4 cm x 48.3 cm x 13.3 cm)
(2.3 kg)
(10.8 cm x 52 cm x 35 cm)
(3.6 kg)
ME15S
microGRAPHIC EQUALIZER
Block Diagram
(both channels identical)
OVERLOAD
OL
SENSE
BYPASS
SWITCH
-6 dB
-12 dB
+6 dB
+12 dB
CHANNEL 1
OUTPUT
RANGE
CHANNEL 1
INPUT
LOW
FILTER
RFI
FILTER
0 dB
BOOST
AMPLIFIER
CUT
AMPLIFIER
20 Hz
(18 dB/Octave)
25 Hz
BP
LEVEL
(Off to +6 dB)
(NC)
TO FILTERS
2-15
Constant-Q:
Proportional 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.
BYPASS
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
ME15S
microGRAPHIC EQUALIZER
Rear Panel
Architectural Specifications
The graphic equalizer shall be of constant-Q design to minimize
interactions between adjacent bands, and contain frequency
bands located on standard ISO center frequencies. Each band
shall have a bandwidth of 2/3-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.
A rotary overall level control shall be provided with a range
from off to +6 dB of gain in balanced mode.
The inputs and outputs shall be active balanced/unbalanced
designs terminated with both XLR and ¼" TRS (tip-ring-sleeve)
connectors. RFI filters shall be provided. The unit shall provide a
passive bypass feature requiring no power to operate. Infrasonic
and ultrasonic filters shall be built-in. LEDs shall be provided to
indicate overload conditions.
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 ME15S Equalizer.
Available Accessories
• SC 1.7 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, “Operator Adjustable Equalizers: An Overview,” RaneNote, (1990).
©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. 1-2014
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