M2TECH MITCHELL Bedienungsanleitung

M2TECH

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

USER MANUAL

REV. PrB – 12/2020

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

Warning!

Changes or modifications not authorized by the manufacturer can invalidate the

compliance to CE regulations and cause the unit to be no more suitable to use. The

manufacturer refuses every responsibility regarding damages to people or things

due to the use of a unit which has been subject to unauthorized modifications or to

misuse or to malfunction of a unit which has been subject to unauthorized

modifications.

This unit is compliant with the following CE regulations: CEI EN 55022:2009 Class B (Radiated Emissions),

CEI EN 55024:1999, CEI EN 55024:A2/2003, CEI EN 55024:IS1/2008 (Radio Frequency Electromagnetic

Fields, 50Hz Magnetic Field Immunity Test and Electrostatic Discharges – ESD).

For a proper operation of this unit, all connections to other equipment in the system must be done

when all equipment are off. Failing to comply with this advice may lead to damage to the MITCHELL.

The label above, printed on the product case, indicates that the product, when no more usable, can’t be

treated as generic garbage, but must be disposed of at a collection point for recycling of electrical and

electronic equipment, in compliance with the WEEE regulation (Waste of Electrical and Electronic

Equipment).

By making sure that this unit is correctly recycled, you will help preventing potential damages to environment

and human health, which could be caused by a wrong treatment of this product as generic garbage.

Materials’ recycling helps saving natural resources. For more in-depth information about recycling this

product, please contact M2Tech Srl.

WARNING: the information contained in this manual are considered to be reliable and accurate.

M2Tech reserves the right to change or modify the information any time, without prior advice. It’s up

to the customer to ensure that the manual being consulted is the latest version.

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

Dear customer,

Thank you for purchasing MITCHELL. You are the owner of a very high quality analog

electronic crossover with many unique features, designed to obtain the best performance

in conjunction with every M2Tech product.

MITCHELL implements a specific set of technological and functional solutions, from the

highly versatile filter modules to high quality active and passive components, to the

companion configuration software that eases the set-up process.

Mitchell provides a wealth of configuration options that make it possible to tailor it to the

most demanding set-up. The all-analog operation avoids the sound quality detriment and

artefacts that affect digital crossover.

We’re sure that your expectations will be fulfilled by purchasing MITCHELL: your hi-fi system

will exhibit an incredible increase of its sonic performance, so you can now prepare for a

whole new listening experience!

Marco Manunta, CEO

Please note here your MITCHELL serial number and purchase info for future reference:

S/N: _______________________ Date of Purchase: _________________________

Place of Purchase__________________________

Note: Proof of retail purchase, such as your purchase receipt, will be required in the unlikely event

that any warranty service will be required

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

TABLE OF CONTENTS

1. Unpacking and Placing the Unit.......................................................................................7

2. Front Panel ......................................................................................................................9

3. Back Panel.....................................................................................................................11

4. Connecting and Powering the Unit.................................................................................13

5. Cleaning the Unit ...........................................................................................................15

6. Trigger ...........................................................................................................................15

7. Theory of Operation.......................................................................................................17

7.1. All-pass Filter...........................................................................................................19

7.2. 1-pole Low-pass Filter .............................................................................................19

7.3. 1-pole High-pass Filter ............................................................................................19

7.4. State Variables Filter (SVF).....................................................................................19

7.5. Gain block ...............................................................................................................20

7.4. Inversion blocks.......................................................................................................20

7.5. Composing blocks to obtain a desired filter configuration .......................................20

8. Configuring the MITCHELL................................................................................................21

8.1. Set commands ........................................................................................................22

8.1.1. Set Filter (SF) ......................................................................................... 22

8.1.2. Set Input (SI) .......................................................................................... 23

8.1.3. Set Level (SL)......................................................................................... 24

8.1.4. Set Mode (SM) ....................................................................................... 25

8.1.5. Set Path (SP) ......................................................................................... 26

8.1.6. Set Remote (SR) .................................................................................... 27

8.1.7. Set Standby (SS).................................................................................... 27

8.2. Get commands ........................................................................................................28

8.2.1. Get Configuration (GC)........................................................................... 28

8.2.2. Get Filter (GF) ........................................................................................ 29

8.2.3. Get Input (GI) ......................................................................................... 30

8.2.4. Get Level (GL)........................................................................................ 31

8.2.5. Get Mode (GM)....................................................................................... 32

8.2.6. Get Path (GP)......................................................................................... 32

8.2.7. Get Remote (GR) ................................................................................... 32

8.2.8. Get Status (GS)...................................................................................... 33

8.2.9. Get Version (GV).................................................................................... 33

8.3. Update commands ..................................................................................................33

8.3.1. Update Start (US)................................................................................... 33

8.3.2. Update Data (UD)................................................................................... 34

8.3.3. Update End (UE) .................................................................................... 34

8.4. Configuration software ............................................................................................35

9. Specifications.................................................................................................................38

Appendix A: List of Available Configurations in the Configuration Software ......................40

A.1. Without all-pass ......................................................................................................40

A.2. With all-pass ...........................................................................................................42

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

1. Unpacking and Placing the Unit

Lay the box on a table and open it with a cutter or a knife, paying attention not to damage

the internal box. Extract the internal box and open it. The following items are included in a

cardboard tray:

one MITCHELL;

one 15V wall adaptor;

one USB cable;

two XLR adaptor cables.

Should one or more item be missing, please contact your retail dealer.

Remove the MITCHELL from the cardboard tray enclosure and place it onto a stable base,

far from heat sources. Avoid full sunlight on the unit. Allow for ample room around the unit

for venting.

The MITCHELL is an audio device which operates at line level, therefore, only a reduced

heat production is expected. Nevertheless, its circuitry operates at high bias for improved

performance. Therefore, an adequate air flow is recommended.

Avoid smoke, moisture, dirt and liquids from reaching the unit. Please note that any signs

of abuse will void warranty coverage.

Do not place the unit on thick carpets or inside a box or piece of furniture, not even close

to curtains.

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

2. Front Panel

Figure 1

1) IR sensor. Receive commands from Rockstars remote controls. It’s useful to let the

MITCHELL enter/exit standby together with other Rockstars units in the system. This feature

must be enabled by the configuration app at set-up.

2) ON/OFF button. Allows to turn the MITCHELL on and off. Also, when the Mitchell is in

standby, pressing this button will activate it.

3) Standby LED (blue). It’s on when the MITCHELL is in standby.

4) Active LED (white). It’s on when the MITCHELL is active.

NOTE: during firmware update, either LEDS can be on, depending on the condition

at update beginning.

5) Micro-USB port. Used for configuration and firmware update. Use the stock cable to

connect to a computer.

M2Tech

www.m2tech.biz

MITCHELL

STEREO ANALOG ELECTRONIC CROSSOVER

REVISION PRB – DECEMBER 2020

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