Rane MPE 14, MPE 28 User Manual
Professional Audio Products Data Sheet
PROGRAMMABLE EQUALIZERS
MPE 14 & MPE 28 MIDI Programmable Equalizers
General Description
The MPE 14, two-channel, 14-band, 2/3-octave, and the
MPE 28, one-channel, 28-band, 1/3-octave MIDI programmable equalizers begin a generation of automated signal
processing from Rane Corporation.
Sound Contracting: Presets can be stored for varying
room configurations, and recalled via front panel, or external
contact closures with the Rane RPS 4 Remote Program
Selector (converting switch closures to MIDI program change
commands). Access security can be maintained in two levels
of front panel lockout.
Live Performance: The MPE series interface to any
MIDI controller or sequencer, allowing not only program
changes, but also curve modification in real time through the
use of MIDI System Exclusive (SYSEX) messages.
MIDI Studios: Not only can the MPEs overcome deficiencies in synthesizer and drum machine voices, they also
add a new musical dimension: Expression. The MPEs respond
to expression controllers such as MIDI continuous controllers
or channel pressure aftertouch. This feature allows dynamic
control and continuous modification of the EQ curve. Bend
your bass or tweak your treble; its now at your fingertips, in
real time.
The MPEs are digitally controlled analog equalizers. Start
with Ranes proven equalizer performance. Put it under the
powerful control of a 16-bit, 16MHz microcontroller. Program the microcontroller to provide full MIDI implementation, including SYSEX. Add it all together and you get an
unbeatable programmable equalizer. The MPEs utilize Ranes
exclusive Interpolating Constant-Q filter technology. The
same design used in the commercial grade model GE 30 for
smooth, consistently accurate performance, and minimum
interaction. The MPEs are fitted with fully balanced Inputs
and Outputs using both 3-pin and ¼" TRS connectors.
The MPEs allow the user to store 128 equalization curves
recalled by either the front panel controls, MIDI commands,
another MPE, a Rane RPS 4, or from a computer. DOS
software is available from the factory (at no charge) that
allows graphic editing of the MPE. Other software companies
produce MPE Editor/Librarians, such as Opcode Systems
(Galaxy) and Mark of the Unicorn (Unisyn and X-oR).
The MPEs also feature decimal and octal program display,
program mapping, curve weighting, ramping, copying, and a
wealth of usable factory EQ presets. Please consult the MPE
Users Guide (available upon request) for further information
on these and other advanced features.
Rane MPE 28 Editor DOS Program Screen
MPE 14 & MPE 28
Features
128 MEMORIES WITH DIRECT RECALL
REALTIME DYNAMIC CONTROL VIA MIDI
CURVE COMPARE, WEIGHTING & COPYING
SNAPLESS EQ CURVE RAMPING
MIDI SYSEX CURVE EDITING
SEPARATE EQ AND SYSTEM DISPLAYS
INTERPOLATING CONSTANT-Q FILTERS
+12/-15dB RANGE IN 1dB STEPS
INDIVIDUAL BYPASS SWITCHES
BALANCED 3-PIN & ¼" IN/OUT
NON-VOLATILE MEMORY
TWO-LEVEL ACCESS SECURITY SYSTEM
UL/CSA REMOTE POWER SUPPLY
DOS EDITOR PROGRAM AVAILABLE
MPE 14 & MPE 28
Professional Audio Products Data Sheet
PROGRAMMABLE EQUALIZERS
Parameter Specification Limit Units Conditions/Comments
Equalizer: Channels (2) MPE 14; (1) MPE 28
..........Bands: MPE 14 (14) 2/3 Octave ISO Spacing 40Hz to 16kHz
...................... MPE 28 (28) 1/3 Octave ISO Spacing 31.5Hz to 16kHz
..........Type Interpolating Constant-Q
..........Accuracy 3 % Center Frequency
..........Range +12/-15 1 dB 1 dB Step Size
..........Program Memories 128
Inputs: Type Active Balanced/Unbalanced
..........Connectors 3-Pin & ¼" TRS
..........Impedance 15k 1% •
..........Maximum Level +20 1 dBu
Outputs: Type Active Balanced/Unbalanced
..........Connectors 3-Pin & ¼" TRS
..........Impedance 200 1% • Balanced:100• Each Output
..........Maximum Level +20 1 dBu
Overall Level Range ±12 2 dB 2 dB Step Size
RFI Filters Yes
Memory Battery Life 3 50% Yrs Ray-O-Vac BR2325, or equal
MIDI Xmit/Rcv Buffer Size 5,000 Bytes
Bypass Switches Yes Each Channel Separate
Overload LED Thresholds +16 1 dBu Output or any Internal Level
Low Filter 15Hz, 18dB/Oct, Butterworth 3% Hz
Frequency Response 15-45kHz +0/-3 dB
THD+Noise 0.008 .001 % +4dBu, 20-20kHz
IM Distortion (SMPTE) 0.009 .002 % 60Hz/7kHz, 4:1, +4dBu
Signal-to-Noise Ratio MPE 14/MPE 28 re +20dBu 20kHz Noise BW, Balanced
108/104 2 dB All Bands Centered, Unity Gain
103/98 2 dB All Bands Centered, Max Gain
100/95 2 dB All Bands Full Cut, Unity Gain
Channel Separation (MPE 14) 75 3 dB 40-20kHz
Power Supply Input 18-24VAC w/center-tap 10% Vrms Proposed AES RAP Standard
Power Supply Connector 6-pin mod plug Wired per above
Safety Agency—Unit
..........Classification Class 2 Equipment National Electrical Safety Code
..........Design Safety Extra-Low Voltage VDE SELV
..........U.L. Listing U.L. 813 Exempt Class 2
..........C.S.A. Certification C22.2 No. 1 Exempt Class 2
..........CENELEC IEC 65 Exempt Harmonization Doc. HD 195.S4
—Remote Power Supply Class 2 Equipment
..........U.L. Listed E90493 UL 1012
..........230VAC Export Model Meets requirements of IEC 950 TUV Approved
EMI/RFI Emission Levels FCC Part 15 Compliance Class A Digital Device
Satisfies VDE 0871 Class A Digital Device
Maximum Current 500 mA RMS Current From Remote Supply
Unit: Construction All Steel
..........Size 1.75"H x 19"W x 8.5"D (1U) (4.4cm x 48.3cm x 21.6cm)
..........Weight 6 lb (2.7 kg)
Shipping: Size 7" x 22" x 13" (18cm x 56cm x 33cm)
..........Weight 11 lb (5.0 kg)
Note: 0dBu=0.775Vrms
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