AVE MX 4 User Manual

Audio Vertriebs­Entwicklungsgesellschaft
mbH

MX 4

Analogue/digital 4-channel mixer

User guide

Table of contents

User guide MX-4 page 2

1. Introduction ................................................................................................................. 3

1.1 Security advice ................................................................................................... 3

2. Description of front and rear panel ............................................................................. 4

3 Basic operation of the MX-4 ....................................................................................... 5

3.1 Programmable settings („presets“) .................................................................... 5

3.2 Changing between presets ................................................................................ 5

3.3 Temporarily changing an existing preset ........................................................... 6

4 Extended functions ..................................................................................................... 6

4.1 Programming a new preset (or reprogramming an existing one) ...................... 6

4.2 Programming the MX-4 / The parameter menu ................................................. 7

4.2.1 Preset ........................................................................................................ 8

4.2.2 Parameters ................................................................................................ 8

4.2.3 Config ........................................................................................................ 9

4.2.4 Service ....................................................................................................... 9

4.2.5 Quick reference: Table with all programmable parameters .................... 10

4.3 Internal modifications ....................................................................................... 10

4.3.1 Phantom voltage, microphone/line, high-pass filter ................................ 11

4.3.2 Automatic threshold reduction, transmission matrix ................................ 11

4.3.3 3-band equalizer, compressor/limiter, gain, threshold ............................ 12

4.3.4 Microprocessor Gate control ................................................................... 13

5 Specifications ............................................................................................................ 13

User guide MX-4 page 3

1. Introduction

Thank you for choosing the A.V.E. analogue/digital 4-channel mixer MX-4 with four
microphone/line inputs; an outstanding unit that was designed particularly for superior audio
quality in churches.

Each microphone/line input is equipped with a compressor/limiter, 3-band equalizer, as well as
indicators for volume, operating status, and peak, respectively. An automatic processing unit
controls additional functions, such as priority, ducking, number of activated microphones, or the
hold time. Furthermore, a variable graphic equalizer with 48 bands (12 per output) allows an
optimisation for every application. 16 fully parametric equalizers (4 per output), each with an
individually adjustable Q-factor of up to 100, as well as an automatic gain adjustment when
additional microphones are activated provide an optimum feedback elimination.

The MX-4 is equipped with its own software. This makes programming simple and straightforward
– Laptop or PC are no longer required. Up to 20 different sets of settings, so-called „presets“, can
be programmed and can easily be recalled by the user for each occasion as required.

This manual adresses users in sections 2., 3., and 4.1. These parts of the manual deal with
explaining the components of the unit and describe the basic operation. The following part is
addressed to the qualified technical personnel in charge of extended programming and internal
modifications.

1.1 Security advice

 Please read the information provided in this manual before starting up the unit.

 WITHIN THIS UNIT THERE IS DANGEROUS VOLTAGE PRESENT CONSTITUTING A

RISK OF ELECTRIC SHOCK. DO NOT OPEN THE COVER. INTERNAL
MODIFICATIONS ARE TO BE COMPLETED BY AUTHORIZED PERSONNEL ONLY.

THERE ARE NO USER- SERVICABLE PARTS INSIDE.

 The MX-4 is equipped with a power cord for connecting the three-pin inlet connector

of the unit to a 230 V / 50 Hz AC voltage source. Make sure this cable is not damaged.
Do not use any defective or damaged power cords!

User guide MX-4 page 4

2. Description of front and rear panel

1. Volume control (for channels 1 – 4): Allows adjustment of the level of the signal sources
connected to the microphone/line inputs (26.). During installation by the technician, the optimal
level will be marked on the unit.

2. Level indicator (for channels 1 – 4): 4-level LED indicator. The maximum level of +5 dB
indicates that the input is overdriven.

3. Gate indicator (green LED; for channels 1 – 4): Optically indicates an activated input. The
processor automatically determines which of the inputs is activated. The level difference at
which an additional microphone is opened, can be set by an internal modification (see section

4.3.4).

4. Channel selector CD/tape: Choose between music rendition via CD or tape. The selection is
indicated by one of the LEDs (5. or 6.). Consumer-level audio equipment such as CD or
cassette player are connected on the back to inputs (24.) or (25.), respectively.

5. LED indicator CD: Music rendition via CD

6. LED indicator tape: Music rendition via tape

7. Volume control for CD/tape

8. Level indicator for CD/tape: A level of +5 dB indicates that the input is overdriven.

9. Low-frequency level control for CD/tape: Controls (9.) and (10.) allow an optimisation of the
sound characteristics of the music rendition.

10. High-frequency level control for CD/tape

11. Volume control for headphones: Input (12.) allows the connection of headphones for
monitoring purposes, the volume of which can be adjusted with this control. Which of the 4
outputs is to be directed to the headphones can be selected in the parameter menu (as
described in section 4.2.3).

12. Connection for headphones

13. LCD display: The bright display contributes to the clear and user-friendly operation of the MX-

4. (The contrast of the display can be adjusted in the parameter menu as described in section

4.2.3.)

14. Volume/Value knob: Rotary encoder with integrated pushbutton. This knob is used, among
others, to set the overall volume or set other values.

15. Preset/Parameter knob: Rotary encoder with integrated pushbutton. This knob is used,
among others, to switch from one preset to another.

User guide MX-4 page 5

1 Power connector: Connector for power cord to a 230 V / 50 Hz AC voltage source.

2 Fuse: 315 mA
3 Main on/off switch
4 Output: Output connectors (to power amplifiers, etc.)
5 Direct OUT: Direct output without any signal processing. This output can be used for capturing

and transmitting the ambiance of e.g. a mass to external rooms.

6 Level Direct OUT: Controls the output level of the direct output
7 Link in: Permits multiple mixers to be linked, creating additional inputs.
8 Link out: Output when linking multiple mixers
9 Tape-recording: Phono connectors for tape-recording
10 Tape rendiction: Phono connectors for music rendition via tape
11 CD rendition: Phono connectors for music rendition via CD
12 Microphone/line inputs

Basic operation of the MX-4

3.1 Programmable settings („presets“)

The MX-4 combines numerous integrated functions with very simple operation. Even in
acoustically difficult environments, best results are achieved. So-called „presets“ can easily be
programmed. No less than 20 of these preset slots enable programming for any application
and make them available to the user at the touch of one’s fingertips.

For each preset, the following 3 parameters are programmed:

 the master volume
 which of the 4 outputs are to be active
 a preset name. This way the different settings are immediately distinguishable.

3.2 Changing between presets

 Turn the unit on with the main on/off switch in the back.
 The welcome message will appear in the display. After a few seconds, it will

disappear again and the settings of the current preset will show up. Below, an
example is given.

Here one can see the current preset

User guide MX-4 page 6

name (in this case „Sonntag“) as well as the value of the master volume in percent

(total output volume, here 70%). The bar above the preset name is an analogue
representation of the master volume.

 On the right-hand side of the display the four little squares represent the 4 outputs (the

numbers 1 through 4 are written above and below the display). A dot within a square
indicates, that this particular output is active.

 Please note: The preset settings can be guarded against accidental changes. In this

„preset protection mode“, changes can only be undertaken by pushing and turning a
knob at the same time.

 In order to switch from one preset to another, push the preset knob while turning it

until the desired preset shows up in the display; then let go. Now, all is set for the next
application.

3.3 Temporarily changing an existing preset

 Should it become necessary to change the volume of a given preset, push the volume

knob (only necessary in the preset protection mode) while turning it to set the desired
value. This change is only temporary, i.e. once the unit is turned off and back on again,
the original preset is active again.

 Should it become necessary to temporarily change the active outputs, then briefly

push both knobs at the same time. By pushing the preset knob, the display will
successively show each output. The respective name of the output will appear (in the

example given below „SchiffV“) as well as a little square next to the corresponding

number of the output. „On“ or „off“ indicate whether the output is active or not. This is

also reflected in the little squares, where a dot in the middle indicates an active output.

 Turning the volume knob by one click, you can change the output to „on“ (active) or

„off“ (deactivated). Briefly pushing the volume knob will take you one level back, and in

the display you will see the preset name again with its current settings. These
changes are also temporary, i.e. will only be effective until the unit is turned off and
back on again.

4 Extended functions

4.1 Programming a new preset (or reprogramming an existing one)

 This section describes how to programme one of the 20 preset slots, i.e. give a preset

name and select the desired master volume and outputs. In the same fashion, existing
presets can be reprogrammed (as opposed to the temporary changes described in
section 3.3).

 First, turn the unit off with the main on/off switch in the back.
 Then, turn the unit back on, while pushing both the volume und preset knobs at the

same time. Keep the knobs pushed until the parameter menu appears (see below).
The four items „preset“, „parameters“, „config“, and „service“ appear.

 Briefly push the preset knob. The first preset will appear („preset 1“ in case no preset

User guide MX-4 page 7

name has been given so far).

 In case you wish to choose a different preset slot, briefly push the volume knob twice.

That way you move back to the main menu and can chose a different preset by
pushing and turning the preset knob.

 A yet unused preset slot can be identified by the fact that it does not yet have given

preset name, but merely „preset“ and a number (e. g. „preset 12“).

 Briefly push both knobs at the same time. Again the parameter menu shows up.
 Push the preset knob. Now you can determine the preset name. The cursor will blink

under the first character.

 By turning the volume knob, the following letters, numbers, and special characters will

appear in this order: A-Z, Ä, Ö, Ü, a-z, ä, ö, ü, 0-9, space, ! „ # $ % & ’ ( ) * + , - . /

 Pushing the preset knob will confirm the current character und move the cursor one

position to the right. Now you can set the next character.

 Wenn you’ve filled in the preset name, turn the preset knob one click to the right to

now determine the master volume for this preset. Set the value by turning the volume
knob. The values range from 0 to 100%. The corresponing value in dB is given in
brackets.

 Now turn the preset knob again one click to the right in order to determine the outputs

for this preset.

 When pushing the preset knob, the 4 outputs will appear one after the other with their

respective names. „On“, as well as a dot in the little square, indicate that this output is

active. By turning the volume knob one click, the shown output can bei either activated
or deactivated.

 Now the programming for this preset is complete. By pushing the volume knob, you

will exit the programming mode. You will be asked whether you would like to „Save
changes?“. Pushing the volume button indicates „yes“ and your changes will be saved
( „Saving … do not interrupt“). Pushing the preset knob indicates „no“ and the
display will show „Changes discarded!“.

,

THE FOLLOWING MODIFICATIONS ARE TO BE PERFORMED

BY QUALIFIED AUDIO TECHNICIANS ONLY.

4.2 Programming the MX-4 / The parameter menu

Functions and settings in the parameter domain should be changed by qualified personnel
only. The only exception is the programming of a new preset as described in section 4.1.

The digital control boasts the great advantage of the programmability of various functions.
In this parameter menu, not only the presets are programmed, but among others, the
equalizers and the parameters for feedback elimination are set. In fact, the entire
programming of the MX-4 is done here with menu-driven user guidance and merely two
knobs. No PC or Laptop are required.

 In oder to enter the parameter menu (and therefore the programming mode), first turn

the unit off.

 Then, turn it back on again while pushing both knobs (volume and preset) until the

parameter menu with its four items preset, parameters, config, and service appear.

 By turning the preset knob, you can change from one menu item to the next which is

indicated by a small triangle.

 By pushing the preset knob, you chose the respective item from the menu.

General comments on programming the MX-4:

User guide MX-4 page 8

 Turning the preset knob one click to the right will always bring you to the next item of a

menu, i. e. to the next parameter to be programmed. This knob is therefore also
marked „parameter“. For simplicity, we will continue to name this knob the preset knob.

 Changing a value or character is always done by turning the volume knob. This knob

is therefore also marked „value“. However, here too for simplicity, we will stay with the
name of volume knob.

 These knobs are so-called dynamic rotary encoders, meaning that when slowly

turning one of them, the value will change in small increments whereas turning a knob
by the same amount more quickly will change the value superproportionally faster.
This enables a fast but precise setting of the desired values.

 By pushing the volume knob, you will go up one level in the menu hierarchy.

Whenever you have changed any parameter, you will be asked whether you would

like to „Save changes?“. Pushing the volume button indicates „yes“ and your changes
will be saved ( „Saving … do not interrupt“). Pushing the preset knob indicates
„no“ and the display will show „Changes discarded!“.

 The following 4 sections will describe the programming possiblities of the 4 menu

items. For quick reference, there is a table of all programmable settings at the end (in
section 4.2.5).

4.2.1 Preset

 Preset name: Determine the name for a given preset. The procedure is described in

detail in section 4.1.

 Preset master molume: Setting the master volume for a given preset.
 Preset output: Choose the desired outputs for a given preset. The procedure is

described in detail in section 4.1.

4.2.2 Parameters

 Level: Determine the level for each output. Set the desired value by turning the

volume knob. Pushing the preset knob will bring you to the next output. With this

indivudual level setting, you will achieve an optimal balance of the outputs which
remains even when changing the master volume.

 Delay: Dalay time for the outputs 3 and 4 only. It can be set in 1-meter increments

and the corresponding delay time is given in milliseconds (calculated according to a
speed of sound of 343 m/s, corresponding to a room temperature of 20 °C). Here, too,
pushing the preset knob will move you from one output to the next.

 Graph EG: Set the level of the 12 bands of the graphic equalizer for each of the 4

outputs (see picture below). By turning the preset knob, you will move to the next

frequency; again by pushing it, you will move to the next output. Please note: The
variable graphic equalizer VariGraph allows you to choose the frequencies of the 1st
and 12th band of the equalizer for an optimal adjustment to each and every application.

These frequencies can be set under the item „config“ as described in section 4.2.3.

The frequencies of the 10 bands in between are calculated automatically.

 Param EQ 1 Freq: Set the 1st frequency of the fully parameteric equalizers (range: 20

Hz to 20.45 kHz). Here, too, the value is set with the volume knob. Pushing the preset
knob will bring you to the next output, so you can set the first frequency for each
output.

 Param EQ 1 Gain: Set the gain of the 1st band (range: +18 to -44 dB). Between +18

and -20 dB very fine 0.5 dB increments are possible.

User guide MX-4 page 9

 Param EQ 1 Q: Set the Q-factor for the 1st band (range: 0.2 to 100; logarithmic

increments 0.2, 0.22, 0.25, 0.28, 0.32, etc.). The high Q-factors enable extremely
narrow-band notch-filters for ideal feedback elimination.

 Param EQ 2-4 Freq: Proceed as described above for bands 2, 3, and 4.
 Param EQ 2-4 Gain: Proceed as described above for bands 2, 3, and 4.
 Param EQ 2-4 Q: Proceed as described above for bands 2, 3, and 4.
 Limiter: Can be indivudually set for each output. By pushing the preset knob, you can

chose the output; turning the volume knob by one click, you can turn the limiter either
„on“ or „off“.

 By pushing the volume knob you return back to the parameter menu. In case you

have canged any parameters, you will be asked whether you would like to save them.

4.2.3 Config

 Graph EQ Band 1: Set the frequency of the 1st band of the graphic equalizer. The

frequency value is set by turning the volume knob.

 Graph EQ Band 12: Set the frequency of the 12th band of the graphic equalzer. A

minimum distance of approximately 2 octaves needs to be maintained between the 1st
and 12st band. The unit will prevent a smaller distance to be set.

 Monitor / VU Out: Selection of one of the 4 outputs for monitoring via headphone. On

the left side next to the display there is a headphone connection that can be used for
monitoring purposes. The output chosen here is also the one corresponding to the VU
meter in the display. By turning the volume knob, you can chose the desired output.

 LCD contrast: Set the contrast of the LCD display from 0 to 50 for an optimal

readability.

 Vol/Preset protect: The protection of the settings is such that changes (e. g.

changing between presets or temporary volume changes) can only be performed
while pushing and turning the knobs at the same time. This is intended to safeguard
the settings from accidental changes. If this protection is turned off, changes can be
made by simply turning the knobs without pushing them. Turning the volume knob by
one click either enables or disables the protection.

 Welcome screen Line 1: Set the first line (16 characters) of the welcome text that

shows up when powering up the unit. The cursor will blink under the first character. By
turning the volume knob, the following letters, numbers, and special characters will
appear in this order: A-Z, Ä, Ö, Ü, a-z, ä, ö, ü, 0-9, space, ! „ # $ % & ’ ( ) * + , - . /
Pushing the preset knob will confirm the current character und move the cursor one
position to the right. Now you can set the next character.

 Welcome screen Line 2: Set the second line (16 characters) of the welcome text that

shows up when powering up the unit.

 Output 1 Name: Determine the name of the first output. 8 characters are available for

this name (e.g. nave, gallery, etc.)

 Output 2 Name
 Output 3 Name
 Output 4 Name

4.2.4 Service

 Firmware: Displays the current firmware version of the unit.

User guide MX-4 page 10

4.2.5 Quick reference: Table with all programmable parameters
Where is which parameter set?

The following table lists the parameter menu with its items and parameters:

Item

Parameter

Description

Preset

Preset name

Name of the preset

Preset master volume

Master volume of the preset

Preset output

Choice of active outputs

Parameters

Level

Level of each output

Delay

Delay times for outputs 3 and 4

Graph. EQ [1st. frequency]

Level of 1st band of the graphic
equalizer; settable vor each
output

…

…

Graph. EQ [12st frequency]

Level of 12th band of the graphic
equalizer; settable for each output

Param. EQ 1 Freq

Frequency of the 1st parametric
equalizer; settable for each output

Param. EQ 1 Gain

Gain of the 1st parametric
equalizer; settable for each output

Param . EQ 1 Q

Q-factor of the 1st parametric
equalizer; settable for each output

… [same for the other

parametric equalizers]

Limiter on/off

Set limiter individually for each
output

Config.

Graph EQ Band 1

Frequency of the 1st band of the
graphic equalizer

Graph EQ Band 12

Frequency of the 12th band of the
graphic equalizer

Monitor / VU Out

Select output for headphone
connection (monitoring) and VU
meter

LCD Contrast

Contrast of the LCD display

Vol/Preset Protect

Rotery encoder protection on/off

Welcomescreen Line 1

1st line of welcome screen

Welcomescreen Line 2

2nd line of welcome screen

Output 1 Name

Name of 1st output

Output 2 Name

Name of 2nd output

Output 3 Name

Name of 3rd output

Output 4 Name

Name of 4th output

Service

Firmware

Firmware version

4.3 INTERNAL MODIFICATIONS

User guide MX-4 page 11

BEFORE OPENING THE UNIT, TURN IT OFF AND

REMOVE THE POWER CORD.

ONLY THEN REMOVE THE SIX SCREWS AN THE COVER.

4.3.1 Phantom voltage, microphone/line, high-pass filter

These modifications are performed by means of jumpers. Within the MX-4, there are two
groups of jumpers for each of the four outputs.
The following image shows the upper group of 4 jumpers each per channel.

Their functions are indicated on the label. In order to realise the function on the left, short
the respective jumper.

 High-pass filters for each of the 4 microphone/line inputs, 40 Hz/ 100 Hz. For the use

of microphones, the jumpers should be set to 100 Hz. This high-pass (low-cut) filter
reduces low-frequency vibrations and compensates for the so-called proximity effect
(the booming sound often associated with close pick-up).

 Phantom power: +48 V. This function is very usful for e. g. condensor microphones,

as most of the latter require phantom power.

 Selection whether microphone or line input

4.3.2 Automatic threshold reduction, transmission matrix

User guide MX-4 page 12

The following image shows the second group of jumpers: 6 jumpers for each of the four
channels. (The numbers 1 through 6 denote the six potentiometers for each channel.
Their functions will be described in section 4.3.3)
 THD: low noise threshold, on/off. A noise gate, determining the response sensitivity of

the microphones, can be either enabled or disabled here. (The threshold itself is
adjusted with potentiometer no. 3, see section 4.3.3). Actually, this analog threshold is
quite redundant, as this the response sensitivity is controlled in a much more precise
fashion by the automatic processor.

 Automatic threshold reduction by the processor when using multiple microphones,

on/off: In order to achieve a maximum gain-before feedback and signal quality, only
those microphones are activated that receive an actual (intended) signal. In parallel,
there is an automatic gain adjustment as additional microphones are activated. This
automatic can be either enabled or disabled by this jumper.

 Selection for each of the four inputs to which outputs (OUT 1 through OUT 4) they are

to be transmitted. By default, each of the inputs are set to all four outputs.

4.3.3 3-band equalizer, compressor/limiter, gain, threshold

The six potentiometers for each channel have the following functions

1. Compressor/limiter: The output limiters prevent distortion during loud peaks. All
signals below the set threshold are not affected whereas those above are compressed.
This keeps the devices connected to the MX-4 from becoming overloaded and
prevents distortion and clipping.

2. Gain: Adjusts the amplification of the channel to the level of the input signal.

3. Threshold control: Adjusts the response sensitivity of the microphone. The here
adjusted threshold can be disabled if necessary by a jumper (see THD in section

4.3.2).

4. High frequencies: 3-Band equalzer for an optimal adaption of the microphone to the
speaker;  12 dB at 10 kHz

5. Mid frequencies:  12 dB at 100 Hz

1
2
3

4
5
6

User guide MX-4 page 13

6. Low frequencies:  12 dB at 70 Hz

4.3.4 Microprocessor Gate Control

 Continous level monitoring of 8 input channels by RISC microprocessor
 Level compare accuracy better than ±2 dB
 Channel on attack time less than 10 ms
 Channel on hold time 256 ms (default) / 512 ms, selectable via switch
 Last On (default) / Channel 1 On, selectable via switch, hysteresis 6 dB
 Simultaneous active channels: none (default) / 3+4 selectable via switch

Switch 1

Hold time

Off

256 ms

On

512 ms

Switch 2

Active channel

Off

Last channel

On

Channel 1

5. Specifications

DSP structure

 4 channels with completely independent 24 bit / 96 kHz digital audio processing output levels

Output level and master volume

 Independent setting of output level for each channel: +12 to - dB (very good resolution with precise 0.5

dB increments from +12 to -20 dB)

 Common setting for overall output level (master volume): +10 to -0 dB (precise 0.5 dB increments from -

10 to -20dB)

Delay

 For channels 3 and 4
 Delay: 0 to 680 ms (0 to 233 meters). Settings: in meters (1-meter increments, calibrated to an acoustic

velocity of 343 m/s, according to a room temperature of 20°C)

Variable graphic equalizer (VariGraph EQ)

 48 bands (12 per output)

Switch 3

Switch 4

Simultaneously addresed microphones

Off

Off

1 (input 1 – 8)

Off

On

2 (input 1 – 8)

On

Off

3 (input 1 – 8)

On

On

4 (input 1 – 8)

User guide MX-4 page 14

 VariGraph: frequencies for the bands 1 and 12 can be arbitrarily chosen (for each channel, minimum

spacing approx. 2 octaves), Q-factors as well as all intermediate bands are automatically calculated
accordingly (allows for an optimal adaption of the equalizer to each application)

Fully parametric equalizer

 16 bands (4 per channel)
 Frequency: 20 Hz to 20.45 kHz (each band), very good resolution of 96 steps per octave
 Gain: +18 to -44 dB (each band), fine 0.5 dB steps from +18 to -20 dB
 Q-factor: 0.2 to 100 (logarithmic scaling 0.2, 0.22, 0.25, 0.28, 0.32, etc.), this permits extremely

narrowband notch filters for feedback elimination without loss of sound quality

Limiter

 Can be enabled separately for each channel, reliably protects the sound system from sudden,

unexpected increases in signal level that can lead to amplifier clipping or loud-speaker damage

Preset (set of programmable parameters)

 Available number of presets: 20
 Preset parameters: master volume, output on/off, preset name

VU meter and master volume indicator

 VU meter for one channel (freely selectable), headphone connection (for monitoring) renders the

selected channel

 VU meter range: 0 to -50 dB, 14 bars (0 dB corresponds to the peak output level of the DSP output)
 Volume bar: renders graphic representation of the master volume

User Interface

 Display: 2 lines of 20 characters each, user input via two rotary encoders with integrated pushbuttons
 All settings are adjusted directly on the instrument by menu-driven user guidance (i.e. without external

PC or laptop)

 Separate parameter domain (EQs, delays, etc.) and user domain (master volume, preset, channel on/off)
 The parameter domain is safeguarded against unauthorised access, the safety mechanism works

without a password (eliminates the problem of forgotten passwords)

 The user domain can be protected against accidental change of settings
 Freely definable welcome message upon power-up (2 lines of 16 characters each)
 For each channel a name can be freely defined (up to 7 characters) which appears in all relevant menus

on the display

DSP internals

 ADC / DAC resolution and sampling rate: 24 bit, 96 kHz
 DSP internal accuracy: 48 bit, entire data path
 DSP audio clock frequency: 96 kHz, entire data path (thus, EQs are very precise at high frequencies)
 DSP internal overload reserve: 48 dB (renders a DSP internal overload in conventional applications

virtually impossible)

Line

 Maximum level: 100 mV (max. gain), 3 V (min. gain)
 Gain: 8 mV (-40 dBu) / 430 mV (-5 dBu)

Microphone

 Maximum level: 2.5 mV (max. gain), 200 mV (min. gain)
 Input impedance: 0.6 mV (-62 dBu) / 45 mV (-25 dBu) 1 dB
 CMMR: > 60 dB at 1 kHz
 THD level: 10 dB
 Hi-pass-filter: 100 Hz, 6 dB/oct
 Phantom power: + 48 V

Tape/CD

 Impedance tape: 16 k
 Impedance CD: 28 k
 Input sensitivity tape: -12 dBu
 Input sensitivity CD: -7 dB

Outputs

 Output impedance OUT 1, 2, 3, 4: 140  balanced; 70  unbalanced

User guide MX-4 page 15

 Output level Out 1, 2, 3, 4: 0 dBu (with master volume at 82 %)
 Output level OUT 1, 2, 3, 4: +9 dBu (with master volume at 100 %)
 Output impedance Direct-OUT: 140  balanced; 70  unbalanced
 Output level Direct-OUT: +6 dBu (variable potentiometer)
 Output impedance REC: 70  unsymmetrisch
 Output level REC: 0 dBu

Linking multiple mixers:

 Impedace Link IN: 10 k unbalanced
 Input sensitivity: -6 dBu
 Output impedance Link OUT: 100  unbalanced
 Output sensitivity: -6 dBu

Headphones

 Impedance headphones: stereo 8  / 32  / 100  / 600 
 Output power headphones: 150 mW / 180 mW / 85 mW / 20 mW

Processor

 Hold time: 8 ms / 256 ms / 512 ms / 768 ms (settable with internal dip-switch)
 Pegelunterschied: 0 dB / 3 dB / 6 dB / 10 dB (settable with internal dip-switch)

3-band equalizer

 High-frequency: 12 dB at 10 kHz
 Mid-frequency: 12 dB at 700 Hz
 Low-frequency: 12 dB at 70 Hz

Frequency response

 -3 dB for CD: 50 Hz – 20 kHz
 -3 dB for microphone: 100 Hz – 16 kHz

Noise

 Noise level Direct-OUT, loaded, 20 Hz – 20 kHz, potentiometer at 0: -97 dBu
 Noise level OUT 1, loaded, 20 Hz – 20 KHz, master volume at 0: -92 dBu
 Noise level OUT 1, loaded, 20 Hz – 20 kHz, master volume at 82 %: -88 dBu

General

 Operating voltage: 230 V~, 50-60 Hz
 Power consumption: 30 W
 Overall dimensions: B x T x H = 483 mm W x 208 mm D x 44 mm H
 Mountable in 19“ rack
 Net weight: approx. 4 kg

User guide MX-4 page 16

Notice

ALL AVE mbH DESIGN SPECIFICATIONS, FILES, DRAWINGS, TABLES, LISTS,
AND OTHER DOCUMENTS ARE BEING PROVIDED “AS IS.”
AVE mbH MAKES NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR
OTHERWISE WITH RESPECT TO THE MATERIALS, AND EXPRESSLY
DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
Information furnished is believed to be accurate and reliable. However, AVE mbH
assumes no responsibility for the consequences of use of such information or for any
infringement of patents or other rights of third parties that may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of
AVE mbH. Specifications mentioned in this publication are subject to change without
notice. This publication supersedes and replaces all information previously supplied.
AVE mbH products are not authorized for use as critical components in life support
devices or systems without express written approval of AVE mbH Corporation.

Trademarks

AVE mbH and the AVE logo are trademarks or registered trademarks of AVE mbH in
the Germany and other countries. Other company and product names may be
trademarks of the respective companies with which they are associated.

Copyright
© 2015 AVE mbH. All rights reserved.

Consulting • Planning • Developing • Assembly of electroacoustic sound systems
AVE GmbH • Gustav-Rau-Straße 6 • 74321 Bietigheim-Bissingen • Germany

Phone [phone] • Fax [phone]

[e-mail] • www.ave-stuttgart.de