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M2Tech

www.m2tech.biz

TOSH

BALANCED LINE PREAMPLIFIER

REVISION P

R

A – JUNE 2023

Warning!

Modifications or alterations not authorized by the manufacturer can invalidate 
compliance with CE regulations and make the appliance no longer suitable for use.
The manufacturer declines all responsibility for damage caused to people or things 
due to improper use or malfunctioning of an appliance subject to unauthorized 
modifications.

This appliance complies with CE standards: CEI EN 55022:2009 Class B (Irradiated Emissions), CEI EN 
55024:1999, CEI EN 55024:A2/2003, CEI EN 55024:IS1/2008 (Radio Frequency Electromagnetic Fields, 
Immunity Test to the 50Hz Magnetic Field and Electrostatic Discharges – ESD).

For correct operation of this appliance, all connections to other appliances in the system must be 
made with all appliances switched off. Failure to comply with this rule may cause damage to the 

TOSH

.

The label above, visible on the shell of the appliance, indicates that the product, at the end of its use, cannot 
be improperly managed as generic waste, but must be treated as an electrical and electronic appliance by an
adequate disposal system in accordance with the regulations by the WEEE directive (or WEEE directive, 
Waste of Electrical and Electronic Equipment).
Once this product is recycled properly, you will avoid potential damage to the environment and human 
health, which could be caused by being disposed of as unsorted municipal waste. Proper reuse of materials 
also reduces waste of resources. For more detailed information on the disposal of this product, please 
contact M2Tech Srl.

WARNING: The information contained in this manual is believed to be reliable and accurate. M2Tech 
reserves the right to change or modify this information at any time, without notice. Customers are 
invited to make sure they are consulting the most recent version of this manual.

Copyright © 2023, M2Tech Srl

3

Summary of Contents for TOSH

Page 1: ...M2TECH TOSH BALANCED LINE PREAMPLIFIER USER MANUAL REV PrA 6 2023...

Page 2: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 2...

Page 3: ...ly with this rule may cause damage to the TOSH The label above visible on the shell of the appliance indicates that the product at the end of its use cannot be improperly managed as generic waste but...

Page 4: ...TOSH is designed for low noise and high dynamic operation to ensure that all the sound quality of the music provided by the sources is delivered to the power amplifiers without any loss The remarkabl...

Page 5: ...l transition from one input to another 20 7 2 6 POWER ON VOLUME setting the listening level at power on activation 20 7 2 7 AUTO OFF automatic shutdown setting 20 7 2 8 STANDBY LED setting the behavio...

Page 6: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 6...

Page 7: ...rect sunlight Leave ample space around it to the device to ensure adequate ventilation and for easy connection between the TOSH Bluetooth module and your smartphone tablet The TOSH is a highly efficie...

Page 8: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 8...

Page 9: ...olume It can be rotated and pressed Refer to Chapter 7 for more details 4 Standby LED When the TOSH is in standby this LED is lit to indicate to the user that the device can be turned on using the sup...

Page 10: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 10...

Page 11: ...ith the balanced one Female RCA 9 Balanced output Connect a stereo power amp or two mono power amps equipped with balanced inputs to this output using interconnect cables terminated in XLR connectors...

Page 12: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 12...

Page 13: ...select the right command codes for the TOSH Below is a brief description of the buttons used for TOSH Standby button allows you to put the TOSH in standby long press and to activate it DIM display dim...

Page 14: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 14...

Page 15: ...each therefore for an alternative use the unused power amplifier must be kept off If you want to use the trigger function connect a mono cable equipped with 3 5mm jack plugs to the trigger output of...

Page 16: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 16...

Page 17: ...ent source it is sufficient to press the button on the right of the front panel item 5 Fig 1 or to avoid doing anything else after a few seconds the TOSH automatically returns to its idle state withou...

Page 18: ...TOSH is equipped with a function for balancing the relative level of the two channels which can be modified in 1 2dB steps between 0 and 6dB towards the left or towards the right Being a command to b...

Page 19: ...or in decibels DECIBELS Since the volume control is an attenuator the step 0 will correspond to the maximum attenuation and to the step with the highest value the minimum attenuation In deciBel mode...

Page 20: ...e discomfort 7 2 6 POWER ON VOLUME setting of the listening level at power on activation It is possible to decide which listening level the TOSH will present upon activation maximum attenuation MUTED...

Page 21: ...connector Fig 2 10 depending on the user s needs The behavior depends on this setting In particular if power is applied to the TOSH the three available settings for POWER MODE work as follows 1 Disab...

Page 22: ...outputs to turn on off the TOSH and other connected M2Tech units in the programmed order Please read the VAN DER GRAAF MKII user manual for details SETUP REMOTE POWER REMOTE POWER ENABLE REMOTE POWER...

Page 23: ...rmware running by the microcontroller using this menu function 7 2 14 DEFAULT restore the factory settings The user may need or want to reset to factory settings This can be achieved by accessing this...

Page 24: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 24...

Page 25: ...other device Typically this is a power amplifier which is thus switched on and off by TOSH itself To avoid disturbing speaker noises when switching on and off the trigger output is activated after the...

Page 26: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 26...

Page 27: ...cable inductance and capacitance do not significantly alter the frequency response of the system The gain of the Tosh depends on which input and which output you are using The balanced output offers...

Page 28: ...M2Tech www m2tech biz TOSH BALANCED LINE PREAMPLIFIER REVISION PRA JUNE 2023 Copyright 2023 M2Tech Srl 28...

Page 29: ...anced single ended 126 dBA balanced balanced THD N 0 005 single ended single ended 0 003 single ended balanced 0 004 balanced single ended 0 003 balanced balanced Crosstalk 104 dB R L 105 dB L R SE SE...

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