Rane | ME 60 | Data Sheet | Rane ME 60 Equalizer Data Sheet

Rane ME 60 Equalizer Data Sheet
DATA SHEET
ME 60
microGRAPHIC EQUALIZER
25
31.5
40
50
63
80
100 125 160 200 250 315 400 500 630 800
1k 1.25k 1.6k
2k
2.5k 3.15k 4k
5k
6.3k
8k
10k 12.5k 16k 20k
LOW
HIGH
+
12
+
12
250
6
6
150
5k
0
0
40
10k
6
6
15
30k
12
12
10
40k
•
•
•
•
•
•
•
•
3k
1
CUT FILTERS
25
POWER
31.5
40
50
63
80
100 125 160 200 250 315 400 500 630 800
1k 1.25k 1.6k
2k
2.5k 3.15k 4k
5k
6.3k
8k
LOW
10k 12.5k 16k 20k
+
12
250
6
6
150
5k
0
0
40
10k
•
•
•
•
•
•
3k
6
6
15
30k
12
12
10
40k
•
•
ME 60
MICROGRAPHIC
EQUALIZER
HIGH
+
12
2
4
6
0
10
8
2
LEVEL
BYPASS
OL
4
6
0
10
2
8
LEVEL
BYPASS
OL
CUT FILTERS
General Description
The Rane ME 60 Stereo Interpolating Constant-Q Equalizer
is a two-channel, 1/3-octave design, housed in a two rack-space
unit. The ME 60 evolved by combining two ME 30B equalizers
in one unit and then embellishing both. Two adjustable band
limiting filters add to each channel’s versatility, as well as the
increased flexibility gained from the additional RCA input and
output connectors. These extra features nicely complement the
proven ME 30B design.
The active filter sections feature the GE 30’s innovative interpolating 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 needed. This differs dramatically from proportional-Q designs encumbered with the unfortunate characteristic of changing bandwidth for every boost/cut level.
Aside from being a constant-Q device, the ME 60 also provides what Rane has dubbed “interpolating” performance. This
means that when two adjacent bands are boosted or cut to the
same level, the response of the equalizer peaks (or interpolates a
response) at a frequency centered between the filters. Interpolating performance allows effective control between ISO centers.
ME 60 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 60.)
The rear of the ME 60 provides an unusually flexible array
of connector choices. 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-Ring-Sleeve balanced connectors, while consumer products normally use the unbalanced RCA phono jacks. Unbalanced
sources also may tie to the ME 60 through mono ¼" connectors
(no ring connection).
Features
•
•
•
•
•
•
Stereo 1/3-Octave Design
±12 dB Boost & Cut Range
Interpolating Constant-Q Bandwidth
Sweepable Low & High Cut Filters
Channel 1 & 2 Level Controls
Passive Bypass Switches
•
•
•
•
•
•
20 mm Filter Slide Controls
Grounded Center Detents
RFI Filters
Balanced XLR, ¼" TRS, and Unbalanced RCA Connectors
UL Listed for USA, cUL Listed for Canada (120 VAC)
Meets CE Requirements for EMC and Safety (230 VAC)
Data Sheet-
ME 60
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
Line Voltage:
..........Domestic
..........Export
Unit: Agency Listing
..........120 VAC model
..........230 VAC model
..........Construction
..........Size
..........Weight
Shipping:
..........Size
..........Weight
Note: 0 dBu=0.775 Vrms
Data Sheet-
Specification
Two
(2x30) 1/3-Octave ISO Spacing
Interpolating Constant-Q
3
20
±12
Active Balanced/Unbalanced
XLR, ¼" TRS & RCA
>20k Balanced
+21
Active Balanced/Unbalanced
XLR, ¼" TRS & RCA
200 Balanced
100 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
Limit
Units
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
Conditions/Comments
From 25 Hz to 20 kHz
Smooth combining
Center frequency
Positive grounded center detent
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
105-130 VAC, 50/60 Hz
205-250 VAC, 50 Hz
UL
cUL (Canada)
CE-EMC EN55013 & EN55020
CE-Safety EN60065
All Steel
3.5" H x 19" W x 8.5" D (2U)
9 lb
UL 813 (file E104174)
C22.2 (file E104174)
EMC directive 89/336/EEC
LV directive 73/23/EEC
4.5" x 20.3" x 13.75"
12 lb
(11.5 cm x 52 cm x 35 cm)
(5.0 kg)
(8.9 cm x 48.3 cm x 21.6 cm)
(4.1 kg)
ME 60
microGRAPHIC EQUALIZER
Block Diagram
(+)
2
1
3
(+)
(–)
OVERLOAD
2
1
3
(–)
OL
SENSE
CHANNEL 1
INPUTS
LOW CUT
RFI
FILTER
(10-250 Hz)
BYPASS
SWITCH
HIGH CUT
0 dB
(3k-40k Hz)
CHANNEL 1
OUTPUTS
–
INTERPOLATING
CONSTANT-Q
GRAPHIC EQ
+
LEVEL
(Off to +0 dB)
BYPASS
(Channel 1 Shown, Channel 2 Identical)
Application Information
The ME 60 offers the same high quality interpolating constant-Q performance as its relative, the GE 30. No compromises
or trade-offs exist in selecting the ME 60. It is constructed using
only precision audio-grade components and advanced integrated
circuits, all assembled onto mil-spec glass-epoxy printed circuit
boards.
The adjustable filters are useful when it is desirable 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.
The interpolating constant-Q performance of the ME 60
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
represents the actual changes to the frequency response. On
conventional designs they do not. Combine this feat with the
Rane-developed “interpolating” characteristic and you have a
truly useful tool.
The ME 60 goes one step further toward being the best
device for any application, offering a choice of all common audio
input and output connectors. The inclusion of XLR, ¼" TRS
and RCA connectors ensures acceptance in all installations.
CONSTANT-Q DETAILS
Traditional equalizer designs present a problem in that the
filter’s level control is actually a part of the filter. Consequently,
whenever the slider is moved, the bandwidth changes. The
output exhibits the desired bandwidth only at full boost or cut.
It degrades to as much as two octaves at moderate slider settings.
Responding to this dilemma, Rane developed a topology ensuring constant filter bandwidth (“Q”) at all slider positions.
Another important advantage of constant bandwidth is
reduction of adjacent filter overlap. Conventional designs exhibit
excessive overlap at moderate slider settings. Adjusting one slider
affects the adjacent neighbors, requiring readjustments to each.
Filter overlap in Rane equalizers is dramatically less, reducing the need for constant readjustment of adjacent sliders. This
means more effective equalization in significantly less time.
INTERPOLATING DETAILS
Today’s sophisticated acoustic measurement tools show exact
trouble spots. Often these lie between ISO centers. An interpolating equalizer allows correction for these response errors by
producing a smooth peak or dip between (i.e., it interpolates,
or inserts between) any two adjacent frequency sliders when
they are raised or lowered the same amount. Non-interpolating
responses exhibit a slight dip (ripple) under similar conditions.
Data Sheet-
ME 60
microGRAPHIC EQUALIZER
Rear Panel
ME 60
FOR CONTINUED
GROUNDING PROTECTION
DO NOT REMOVE SCREW
RANE CORP.
WIRING
WARNING
TIP / PIN 2 = POSITIVE
RING / PIN 3 = NEGATIVE
SLEEVE = SIGNAL GROUND
PIN 1 = CHASSIS GROUND
TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO
NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO
NOT REMOVE COVER. NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
ACN 001 345 482
CHANNEL 1
INPUT
INPUT
INPUT
CHANNEL 2
OUTPUT
OUTPUT
OUTPUT
INPUT
120 V
50/60 Hz
12 WATTS
AVIS
RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR
OUTPUT
Architectural Specifications
The graphic equalizer shall be a two channel model of interpolating constant-Q 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 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 inputs shall be active balanced/unbalanced designs terminated with XLR, ¼" TRS (tip-ring-sleeve), and RCA connec-
tors. The outputs shall be active balanced/unbalanced with equal
output impedances terminated with XLR, ¼" TRS, and RCA
connectors. RFI filters shall be provided. The unit shall provide
a passive bypass feature for each channel requiring no power to
operate. LEDs shall be provided to indicate overload and bypass
conditions.
The 120 VAC 50/60 Hz model shall be UL and cUL listed
and operate by means of its own built-in power supply. The 230
VAC 50 Hz model shall meet the European requirements for
EMC and safety and carry the CE mark of compliance. The unit
shall be constructed entirely from cold-rolled steel.
The unit shall be a Rane Corporation ME 60 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 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Data Sheet-
All features & specifications subject to change without notice. DOC 107094
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