Page 1
DATA SHEET
LEVEL LEVELOL OLBYPASS BYPASSRANGE RANGE POWER
CHANNEL 1
63010025 40 63 250160 400 6.3k1k 1.6k 2.5k 4k 16k10k 63010025 40 63 250160 400 6.3k1k 1.6k 2.5k 4k 16k10k
ME 15B
CHANNEL 2
±12±12
12
•
6
•
•
•
6
12
0
+
12
•
6
•
•
•
6
12
0
+
100
248
6
100
248
6
±6 ±6
MICROGRAPHIC
EQUALIZER
6
•
3
•
•
•
3
6
6
•
3
•
•
•
3
6
0
+
0
+
General Description
e Rane ME 15B microGraphic Equalizer is a two-channel,
⅔-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. e ±12 dB mode provides a wide range of
control over system audio.
e 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. is differs
ME 15B
microGRAPHIC EQUALIZER
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. e rear of the unit
provides both ¼" Tip-Ring-Sleeve and XLR connectors for each
of the Inputs and Outputs. e 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.
Features
• Constant-Q Bandwidth Design
• Overall Level Control
• Passive Bypass Switch
• 20 mm Filter Slide Controls
• ±6 dB or ±12 dB Slider Range
• Grounded Center Detents at 0 dB
• Infrasonic, Ultrasonic, & RFI Filters
• Fully Balanced XLR 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)
Data Sheet-1
Page 2
ME 15B
microGRAPHIC EQUALIZER
Features and Specifications
Parameter Specification Limit Units Conditions/Comments
Equalizer:
..........Bands (15) ⅔-octave ISO spacing From 25 Hz to 16 kHz
..........Type Constant-Q
..........Accuracy 3 % Center frequency
..........Travel 20 mm Positive grounded center detent
..........Range ±12 or ±6 1 dB Switch selectable
Inputs: Type Active balanced/unbalanced
..........Connectors XLR & ¼" TRS
..........Impedance 20k balanced; 10k unbalanced min Ω
..........Maximum Level 20 1 dBu
Outputs: Type Active balanced/unbalanced
..........Connectors XLR & ¼" TRS
..........Impedance 200 balanced 100 unbalanced 1% Ω
..........Maximum Level +20 balanced +15 unbalanced 1 dBu 2 kΩ
+19 balanced +13 unbalanced 1 dBu 600 Ω
Overall Gain Range Off to +0 (unbalanced output) min dB Sliders centered
Off to +6 (balanced output) min dB Sliders centered
RFI Filters Yes
Passive Bypass Switches Yes
LED resholds: Overload 4 1 dB Below clipping
Infrasonic Filter 20 Hz, 18 dB/octave, Butterworth 3% Hz
Frequency Response 20-100 kHz +0/-3 dB
THD+Noise 0.011 max % +4 dBu, 20-20 kHz, 20k BW
IM Distortion (SMPTE) 0.01 max % 60 Hz/7 kHz, 4:1, +4 dBu
Signal-to-Noise Ratio re +20 dBu +4 dBu 20 kHz noise bandwidth
107 91 2 dB Sliders centered, unity gain, balanced
92 76 2 dB Full boost, unity gain, balanced
104 88 2 dB Full cut, unity gain, balanced
Channel Separation 85 min dB 1 kHz
Common Mode Rejection 40 1 dB 1 kHz
Maximum Power 12 W
Line Voltage: Domestic 105-130 VAC, 50/60 Hz 2 VAC Max input, 100 kΩ load, unity
..........Export 210-250 VAC, 50 Hz 2 VAC Max input, 100 kΩ load, unity
Unit: Agency Listing
..........120 VAC model UL UL 813 (file E104174)
cUL (Canada) C22.2 (file E104174)
..........230 VAC model CE-EMC (EN55013 & EN55020) EMC directive 89/336/EEC
CE-Safety (EN60065) LV directive 73/23/EEC
Unit: Construction All steel
..........Size 1.75" H x 19" W x 5.25" D (1U) (4.4 cm x 48.3 cm x 13.3 cm)
..........Weight 5 lb (2.3 kg)
Shipping: Size 4.25" x 20.3" x 13.75" (10.8 cm x 52 cm x 35 cm)
..........Weight 8 lb (3.6 kg)
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Page 3
Block Diagram
OUTPUT
BYPASS
SWITCH
BYPASS
(NC)
AMPLIFIER
BOOST
TO FILTERS
2-15
25 Hz
BP
CUT
AMPLIFIER
(18 dB/Octave)
LOW
FILTER
20 Hz
LEVEL
(Off to +6 dB)
0 dB
RFI
FILTER
INPUT
-6 dB -12 dB +12 dB+6 dB
RANGE
CHANNEL 1
CHANNEL 1
SENSE
OL
OVERLOAD
Rane: Proportional Q:
3dB
1/3 octave 1/3 octave
3dB
3dB
1/3+ octave
3dB
2+ octaves
Bandwidth, defined 3dB down
from peak, remains consistent. dramatically with changes in gain.
Bandwidth here changes
FREQUENCY
AMPLITUDE
FREQUENCY
AMPLITUDE
Proportional Q:
Rane:
0dB
+3dB
+6dB
1
2 2
1
1 1
2
2
Constant-Q design
has little interaction
as a single slider
is moved from
1 to 2.
1 to 2.
moved from
single slider is
affected when a
Both filters are
(both channels identical)
ME 15B
microGRAPHIC EQUALIZER
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 Rane GE series. 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.
e Rane ME Series microGraphic Equalizers exist for
people requiring the best equalizer value possible in the smallest
space allowable. ese consist of three models—the ME 15B,
a two channel, ⅔-octave design, the ME 30B, a one channel,
⅓-octave version, and the ME 60, a two channel, two rack space,
⅓-octave model (refer to the ME 30 and ME 60 data sheets).
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 constantQ 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.
e 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.
Data Sheet-3
Page 4
ME 15B
WIRING
TIP / PIN 2 = POSITIVE
RING / PIN 3 = NEGATIVE
SLEEVE = SIGNAL GROUND
PIN 1 = CHASSIS GROUND
MADE IN U.S.A.
RANE CORP.
CHANNEL 2 CHANNEL 1
OUTPUT INPUT OUTPUT
ME 15B
INPUT
N108
50/60 Hz
12 WATTS
120 V
WARNING
TO REDUCE THE RISK OF FIRE
OR ELECTRICAL SHOCK DO
NOT EXPOSE THIS EQUIPMENT
TO RAIN O R MOISTURE. D O
NOT REMOVE COVER. NO
USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
FOR CONTINUED GROUNDING PROTECTION
DO NOT REMOVE SCREW
microGRAPHIC EQUALIZER
Rear Panel
Available Accessories
• SC 1.7 Security Cover
Architectural Specifications
e 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.
e 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. e 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.
e 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. e unit shall be UL and
cUL listed. e unit shall be entirely constructed from coldrolled steel.
e unit shall be a Rane Corporation ME 15B Equalizer.
References
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB w ww.rane.com
Data Sheet-4
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).
All features & specifications subject to change without notice. DOC 106284
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