Rane | ME 15B | Data Sheet | Rane ME 15B Data Sheet

Rane ME 15B Data Sheet
M E 15B & M
E 3
0B
ME
30B
Professional Audio Products Data Sheet
microGRAPHIC EQUALIZERS
General Description
The Rane ME Series microGraphic Equalizers consists of
three models—the ME 15B, a two channel, 2/3-octave design,
the ME 30B, a one channel, 1/3-octave version, and the ME
60, a two channel, two rack space, 1/3-octave model (refer to
the ME 60 data sheet). The ME 15B and ME 30Bs are single
rack-space units. They feature 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
Features
• Constant-Q Bandwidth Design
• Overall Level Control
• Passive Bypass Switch
• 20 mm Filter Slide Controls
• ±6 dB or ±12 dB Slider Range
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, aside from the sliders
and the filter range switches, include an overall Level control
for each Channel as well as overload indicators. The rear of
the unit provides both ¼" Tip-Ring-Sleeve and XLR 3-pin
connectors for each of the Inputs and Outputs. The Inputs and
Outputs are fully actively balanced. Unbalanced sources may
be connected through the use of either “mono” ¼" connectors
or by tying the ring to the sleeve on TRS type plugs.
•
•
•
•
•
•
Grounded Center Detents
Infrasonic, Ultrasonic, & RFI Filters
Fully Balanced 3-Pin Inputs and Outputs
¼" TRS Balanced/Unbalanced Inputs and Outputs
UL Listed for USA, cUL Listed for Canada (120 VAC)
Meets CE Requirements for EMC and Safety (230 VAC)
M E 15B & M
E 3
0B
ME
30B
microGRAPHIC EQUALIZERS
Professional Audio Products Data Sheet
Features and Specifications
Parameter
Equalizer:
..........Bands: ME 15B
..................... ME 30B
..........Type
..........Accuracy
..........Travel
..........Range
Inputs: Type
..........Connectors
..........Impedance
..........Maximum Level
Outputs: Type
..........Connectors
..........Impedance
..........Maximum Level
Specification
(15) 2/3-octave ISO spacing
(30) 1/3-octave ISO spacing
Constant-Q
3
20
±12 or ±6
Active balanced/unbalanced
3-pin & ¼" TRS
20k balanced; 10k unbalanced
26
Active balanced/unbalanced
3-pin & ¼" TRS
200 balanced; 100 unbalanced
+20 balanced; +15 unbalanced
+19 balanced; +13 unbalanced
Overall Gain Range
Off to +0 (unbalanced output)
Off to +6 (balanced output)
RFI Filters
Yes
Passive Bypass Switches
Yes
LED Thresholds: Overload
4
Infrasonic Filter
20 Hz, 18 dB/octave, Butterworth
Ultrasonic Filter
100 kHz, 12 dB/octave
Frequency Response
15-100 kHz
THD+Noise
0.009
IM Distortion (SMPTE)
0.005
Signal-to-Noise Ratio
re +20 dBu/+4 dBu
107/91
92/76
104/88
Channel Separation (ME 15B) 85
Common Mode Rejection
46
Maximum Power
12
Line Voltage: Domestic
98-130 VAC, 50/60 Hz
..........Export
190-250 VAC, 50 Hz
Unit: Agency Listing
..........120 VAC model
UL
cUL (Canada)
..........230 VAC model
CE-EMC cert. (EN55013 & EN55020)
CE-Safety certified (EN60065)
Unit: Construction
All steel
..........Size
1.75" H x 19" W x 5.25" D (1U)
..........Weight
5 lb
Shipping: Size
4.25" x 20.3" x 13.75"
..........Weight
8 lb
Note: 0 dBu=0.775 Vrms
Limit
Units
Conditions/Comments
From 25 Hz to 16 kHz
From 25 Hz to 20 kHz
1
%
mm
dB
min
1
ohms
dBu
1%
1
1
min
min
ohms
dBu
dBu
dB
dB
1
3%
3%
+0/-3
.002
.003
dB
Hz
Hz
dB
%
%
2
2
2
min
1
dB
dB
dB
dB
dB
W
VAC
VAC
2
2
Center frequency
Positive grounded center detent
Switch selectable
2k ohms
600 ohms
Sliders centered
Sliders centered
Below clipping
+4 dBu, 20-20 kHz
60 Hz/7 kHz, 4:1, +4 dBu
20 kHz noise bandwidth
Sliders centered, unity gain, bal.
Full boost, unity gain, balanced
Full cut, unity gain, balanced
1 kHz
1 kHz
Max input, 100k ohm load, unity
Max input, 100k ohm load, unity
UL 813 (file E104174)
C22.2 (file E104174)
EMC directive 89/336/EEC
LV directive 73/23/EEC
(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)
Professional Audio Products Data Sheet
Block Diagram
Application Information
Rane’s microGraphic series of single rack space graphic
equalizers offers the same high quality constant-Q performance as their long throw relatives, the GE’s. No compromises or trade-offs exist in selecting the microGraphics. All
circuitry, components and specifications are essentially
identical. Only the slider throw is different, plus you gain a
Range switch to help extend the usable travel if modest boost/
cut amounts are needed. In fact, the travel distance for 6 dB
of boost/cut is identical to the GE 215, GE 130, or
GE 60 when in the ±6 dB mode.
These models exist for people requiring the best equalizer
value possible in the smallest space allowable.
Constant-Q graphic equalizers arose from the sound
professional’s need for greater control with less interaction
than previously possible with conventional equalizers. Truth
in slider position became a requirement. The curve traced out
by the slider positions on constant-Q designs indeed represents the actual changes to the frequency response. On
conventional designs they do not.
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. Eliminating a phenomena Rane calls “equalizing the equalizer”.
The accompanying figures dramatically show the advantages of constant-Q designs. For a brief explanation of Rane’s
design philosophy please see the GE 130/215 data sheet; and
for more technical information please consult the references
on the back page.
M E 15B & M
E 3
0B
ME
30B
microGRAPHIC EQUALIZERS
M E 15B & M
E 3
0B
ME
30B
Professional Audio Products Data Sheet
microGRAPHIC EQUALIZERS
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 either 1/3 or 2/3-octave,
as specified elsewhere. 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 3-pin and ¼" TRS (tipring-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 power supply connected to 120 VAC (240 VAC
where applicable) 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 ME Series Equalizer.
Available Accessories
• SC 1.7 Security Cover
References
1. D. Bohn, “Constant-Q Graphic Equalizers,” Rane Note 101, (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,” Rane Note 115, (1986).
6. D. Bohn, “Operator Adjustable Equalizers: An Overview,” Rane Note 122, (1990).
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (425)355-6000 FAX (425)347-7757 WEB http://www.rane.com
Printed in the U.S.A. on Recycled Paper
All features & specifications subject to change without notice. 06302 OCT97
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