MP-2 Microphone Preamplifier
User Guide and Technical Information
Page 2
©1999-2000 Sound Devices, LLC
Specifications
Gain:
Mic Input to Output, per channel, continuously variable
Output
Gain Range
LINE
16 – 66 dB
TAPE
6 – 56 dB
Frequency Response (see graph below):
20 Hz – 30 kHz, +0.1, -0.5 dB
-1 dB at 5 Hz, 50 kHz
(relative to 1 kHz level with 150 ohm source, gain controls
set at 50%)
Equivalent Input Noise:
-126 dBu (-128 dBV) minimum
(150 ohm source, flat weighting, 22 – 22 kHz bandwidth,
gain control set at 50% or higher, phantom power off)
Input Clipping Level:
–10 dBu minimum, phantom off
0 dBu minimum, phantom on
Output Clipping Level:
Line
+22 dBu minimum with 100k ohm load
+20 dBu minimum with 600 ohm load
Tape
+11 dBu (2.75 V RMS) minimum with 100k ohm load
Dynamic Range:
110 dB minimum
THD + Noise:
0.05% maximum
(from 50 Hz to 22 kHz @ +4 dBu output level, 22 Hz - 22
kHz filter bandwidth, gain control at 50%, phantom off)
Common Mode Rejection Ratio:
100 dB minimum at 80 Hz
60 dB minimum at 10 kHz
Channel Separation:
Greater than 80 dB at 1 kHz (gain controls set to 50%)
Inputs:
Transformer-balanced, 2k ohm input impedance
Outputs:
XLR
Active, impedance-balanced, 120 ohm output
impedance
Tape (3.5 mm)
Unbalanced, tip-left, ring-right, sleeve-ground, 2.4k
ohm output impedance
High Pass Filters:
80 Hz or 160 Hz (switch selectable), 6 dB per octave
Phantom Power:
15 V through 680 ohm resistors or 48 V through 6.8k
resistors (switch selectable)
Limiter:
Thresholds independently adjustable from
–10 dBu to +18 dBu
10:1 limiting ratio
5 mS attack time, 100 mS release time
Amber/Red LED indicates limiting/clipping
Dual mono or stereo linked
Internal Voltage Rails:
+15 V and –15 V, regulated
Metering:
7 segment GaN (Gallium Nitride) meter with three levels
Peak responding
Power:
Internal
2 AA alkaline batteries, 6 hours life typical with +4
dBu signal into 600 ohms, no phantom power
External
5 - 18 VDC via threaded coaxial connector (5.5 mm
outer diameter, 2.1 mm inner diameter)
Pin positive, sleeve negative (50 mA min. at 12 VDC)
Voltages above 14 VDC cause no damage to unit, but
will open an internal poly fuse. Poly fuse will reset
when voltage is removed.
Power LED:
Green indicates power and good battery.
Red indicates power and low battery. LED turns red when
approximately 1 hour of battery life remain (with phantom
power off).
Green with external DC power.
Polarity:
All inputs to all outputs, non-inverting. Pin 2 of XLRs “hot”
to unbalanced inputs and outputs.
Operating Temperature Range:
0 to 70 degrees C
32 to 160 degrees F
Dimensions:
43 mm x 94 mm x 140 mm (h x w x d)
(1.7” x 3.7” x 5.5”)
Weight (unit only):
0.8 kg
2.0 lbs.
Weight (packaged):
1.2 kg
3.0 lbs.
Certifications:
Meets FCC Part 15 Class B
Eligible to bear CE mark (see conformance statement)
