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Introduc Ion T; Features; Control Elements - Alto MP2D User Manual

Two channels microphone / instrument preamplifier with stereo bus

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1. INTRODUCTION
Congratulation! Now you are the owner of the MP2D Two Channel Microphone / Instrument Preamplifier with
Stereo Bus, which is provided with 129dB of signal to noise ratio and 0.007% of THD. Each channel provides an
1/4 inch instrument socket , individual phantom power, phase reverse and high pass filter. It is equipped with a
"vintage" function to add warm, tube-like sounds to your mix. The MP2D includes a sophisticated 24 bit digital
output interface with external / internal clock and AES / EBU and S/ PDIF connectors. We believe MP2D is your
perfect choice for enhancing the performance of any console or digital audio workstation by providing two very
high-end microphone preamplifiers.

2. FEATURES

48V Phantom Power
80Hz High Pass Filter
Polarity Reverse
"Vintage" function for tube simulation
Highly accurate12 Segment Level Display
Low Impedance Stereo Mix Bus can be used for Full Control Over Stereo Imaging
Fully Loaded Back Panel Featuring XLR Balanced I/O Connectors as well as Separate Send and Return Jacks for
Dynamics Processors
Inserting
Ultra high impedance 1/4" instrument input
Mix Output Connectors are XLR Balanced Providing Connectivity for Professional Recording Systems
3.

CONTROL ELEMENTS

3.1 The Front Panel
CHANNEL 1
CHANNEL 1
INSTRUMENT
INSTRUMENT
LTO
R R
E S O T A R
0
0
60dB
60dB
GAIN
GAIN
1 1
2 2
1 1
1/4" Instrument Input Socket
The unit is equipped with two 1/4" instrument inputs, which have been designed to connect some instruments
such as electric guitars or basses. They are ultra high impedance amplifier designed to allow the audio potential
of an acoustic or elec tric instrument pickup to be fully realized.
Note: please do not use the pre-amp of the instrument on-board (if possible), in order to avoid distortion caused
by over-driving the input signal.
2 2
Input Gain Control
This pot can adjust the gain of the input signal. The gain range can be varied from 0dB to +60dB.
3 3
Vintage Control
This pot can be used to select the amount of boost (0%-100%) applied to the even harmonic series of the signal
Being amplified by a channel of the MP2D. The effect of manipulating the harmonic distortion is of increasing or
decreasing the apparent "warmth" of the signal. This capability is derived from the transformer and its dual servo
gain stage.
4 4
Phantom Power Switch
The unit provides +48V Phantom Power to every channel. Via this lighted switch, you can turn on /off the +48V
phantom Power for condenser microphone.
Note: please do not connect dynamic microphone when the phantom Power is on. Otherwise, It may damage
the device and the microphone.
4 4
7 7
9 9
-30
-30
-24
-24
-16 -8 -4 -2 0 2 4 8
-16 -8 -4 -2 0 2 4 8 16 24
16 24
OUTPUT LEVEL
OUTPUT LEVEL
INSTRUMENT
INSTRUMENT
48V
48V
0%
0%
100%
100%
L/R
L/R
L
L
R
R
VINTAGE
VINTAGE
PAN
PAN
3 3
5 5
6 6
8 8
-30
-30
-24
-24
-16 -8 -4 -2 0 2 4 8 16 24
-16 -8 -4 -2 0 2 4 8 16 24
CHANNEL 2
CHANNEL 2
48V
48V
0
0
60dB
60dB
0%
0%
100%
100%
L/R
L/R
L
L
GAIN
GAIN
VINTAGE
VINTAGE
PAN
PAN
4
MASTER
MASTER
OUTPUT LEVEL
OUTPUT LEVEL
0
0
-
-
R
R
10dB
10dB
0
0
10dB
10dB
LEVEL
LEVEL
PHONES
PHONES
10
10
12
12
11
11
ON
ON
MP2D
MP2D
2 CHANNEL
2 CHANNEL
MIC PRE-AMPLIFIER
MIC PRE-AMPLIFIER
POWER
POWER
13
13
14
14

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