Marenius MM-4220 T/C, MM-4220 T, MM-4220 C User Manual

Stereo Audio Mixer

MM-4220 T/C

| Manual |

Version 1.03 T/C

6/18/2009 www.marenius.se

Table of contents

1. GENERAL DESCRIPTION 1

2. CONNECTIONS 2

2.1 POWER SUPPLY 2

2.2 AUDIO INPUTS 2

2.3 AUDIO OUTPUTS 2

2.4 PHONES OUTPUT 3

2.5 DIGITAL OUTPUT 3

2.6 USB SOCKET 4

3. USER INSTRUCTIONS 5

3.1 AUDIO MIXER 5

3.2 AUDIO RECORDER 6

3.2.1 16 / 24 bits mode selection 6

3.2.2 Checking recording buffer state 7

3.3 SETTING THE INTERNAL CLOCK 7

3.4 TIME CODE SYNCHRONIZATION (JAM) 8

3.5 POWER SUPPLY 8

4. TECHNICAL SPECIFICATIONS 9

6/18/2009 www.marenius.se

1. General description

MM-4220 includes:

 4 low-noise mic/line inputs
 Compact Flash recorder
 Re-chargeable batteries
 Heavy-duty metal case
 Compact size
 1 kHz test tone
 48V phantom power
 AES3-id digital out
 LTC time code jam input
 A highly accurate crystal oscillator

The MM-4220 is a true professional stereo Mixer for portable use, made by MARENIUS.
It offers four mic/line input channels, built-in Compact Flash card recorder, PPM
metering with 2 x 8 multicolored LED’s, low-noise amplifiers and power supply based on
re-chargeable NiMH cells for up to 8 hours use. All this is housed in a compact, all-metal
heavy-duty case.

The front panel holds all controls for the mixer. On top of the panel are toggle switches for
Power, Test Tone and Battery Test.
48V phantom power may be selected for 0, 2 or 4 inputs.
Each of the four channels has a gain control pot and a pan pot. In addition there is a gain
selector switch for 0, 24 or 48 dB gain. The gain pot adds up to 12 dB and the master pot adds
another 12 dB for a total of 72 dB gain, input-to-output.
There is also a toggle switch for inserting a HP-filter for wind and bass cut.

On the upper part of the front panel is the PPM bar graph with 16 multicolor LED’s covering the

range -50 to 0 dB in optimized step size.
You will also find the master pot and the headphones pot, as well as a switch for selecting 48V
phantom power for 0, 2 or 4 channels.
The CF card slot will accept up to 16 GB cards. Recordings are saved in uncompressed WAV
format on FAT32 formatted cards.
Recordings are stereo, 16-24 bits @ 48 kHz, selectable in setup menu by a PC connected to
the USB port, or by front panel switches during power-up.
The backside panel holds all sockets for inputs, outputs and external power supply.
There are four input sockets (XLR-3F) for the input channels and two sockets (XLR-3M) for the
main outputs L and R.
A 3.5 mm stereo socket is intended for headphones (32 - 2000 ohms impedance).
There is also an AES3-id RCA socket output and a USB socket for configuration of the mixer.
External power supply can be used for prolonged working time or when the mixer is used in a
non-portable mode.
The external power should be 18 V @ 1 A.
When powered from internal accumulator, expect a total working time of 6-8 hours, depending
on battery status and temperature.
A high-speed charger function is included for a charging time of about 2.5 hours.

Along with a specially made cable connected to the USB port a LTC time code signal may be
connected for jamming the internal clock to frame accuracy.

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Balanced analog audio input

Connector type

XLR Female

Ground

Pin 1

Hot

Pin 2

Cold

Pin 3

Balanced analog audio output

Connector type

XLR Male

Ground

Pin 1

Hot

Pin 2

Cold

Pin 3

Unbalanced analog audio input

Connector type

XLR Female

Ground

Pin 1

Signal

Pin 2

Ground

Pin 3

2. Connections

2.1 Power supply

The 2.1 mm power jack on the back of the unit accepts a clean DC voltage for powering and/or
charging. The polarity can be switched without damaging the mixer.

Input voltage: 18 VDC
Minimum input current: 1000 mA

! Caution: Voltages above the recommended supply voltage can damage the device.

2.2 Audio inputs

The mixer has four balanced XLR3 female sockets for mic or line level signals.
The pin configuration of the analog inputs is shown in table 2.1.

Table 2.1

In case a line level signal is connected, make sure the 48V front panel switch is set to OFF (mid
position).

For an unbalanced line level signal connect in accordance with table 2.2.
Table 2.2

2.3 Audio outputs

There are two balanced XLR3 male sockets for line level outputs.
The pin configuration of the analog outputs is shown in table 2.3.

Table 2.3

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