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MARLEY MKII

HIGH PERFORMANCE HEADPHONES AMPLIFIER

REVISION P

R

A – JUNE 2019

Copyright © 2019, M2Tech Srl

34

M2Tech

www.m2tech.biz

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Summary of Contents for MARLEY MKII

Page 1: ...M2TECH MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER USER MANUAL REV PrA 6 2019...

Page 2: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 2 M2Tech www m2tech biz...

Page 3: ...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 Marley MkII The label above printed on the product case indicates th...

Page 4: ...m your smartphone or tablet straightforward The single ended and balanced outputs with selectable output impedance allow for driving every kind of headphones The ability of setting the output impedanc...

Page 5: ...ing disabling the tone control 25 7 4 8 TONE CONTROL LVL setting the tone control levels 25 7 4 9 CROSSFEED enabling disabling cross feed 26 7 4 10 OUTPUT IMPEDANCE choosing the right impedance for yo...

Page 6: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 6 M2Tech www m2tech biz...

Page 7: ...I from the box 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 MARLEY MKII is a high efficiency device theref...

Page 8: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 8 M2Tech www m2tech biz...

Page 9: ...value 4 Encoder It allows for accessing and navigating the menu selecting inputs and setting the volume It can be rotated and pushed Please refer to Chapter 7 for more details 5 IR receiver Aim the r...

Page 10: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 10 M2Tech www m2tech biz...

Page 11: ...ts Connect two analogue sources provided with single ended line level output Female gold plated RCA sockets 11 Balanced analog input Connect an analogue source provided with balanced line level output...

Page 12: ...PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 12 M2Tech www m2tech biz 17 Trigger input Connect to the trigger output of any other device providing 5VDC to 12VDC F...

Page 13: ...R blinks instead the MARLEY MKII will not receive the command In this case press the AMP key to select the right commands codes for the MARLEY MKII Below is a brief description of the relevant keys fo...

Page 14: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 14 M2Tech www m2tech biz...

Page 15: ...DC to 12VDC which you want the MARLEY MKII to turn on Connect the plug from the stock wall wart or from the Van Der Graaf MkII to the MARLEY MKII power input Figure 2 15 or from the Van Der Graaf MkII...

Page 16: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 16 M2Tech www m2tech biz...

Page 17: ...the Unit The MARLEY MKII should be cleaned with a soft slightly damp cloth Do not use alcohol or any other types of cleaning fluids as they could damage the unit Avoid fluids from dropping or leaking...

Page 18: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 18 M2Tech www m2tech biz...

Page 19: ...et from 85dB minimum to 0dB maximum in 0 5dB steps Depending on the chosen volume display mode the display will show attenuation in dB or in steps on a scale such that step 0 is equivalent of the mini...

Page 20: ...nds the Marley MkII will automatically return in its idle status without changing the source setting 7 4 Menu Navigation The Marley MkII allows for configuring various parameters some of which the one...

Page 21: ...e backlight mode it is necessary to access the first menu item or to use the DIM key on the remote control As for the balance this feature is applied in real time to give user the possibility to immed...

Page 22: ...oder clockwise or pushing the arrow right key on the remote control To confirm or discard the newly chosen balance setting proceed as described in paragraph 7 4 Changes to the balance can be heard in...

Page 23: ...r example a listening level of 15dB is higher than a listening level of 20dB In steps mode the maximum listening level is 170 while positive values with decreasing magnitude indicate decreasing listen...

Page 24: ...l set at power on volume can be set to minimum MUTED or to the last level set before previous power off 7 4 6 FADE CONTROL fade out and fade in while switching inputs Sometimes the abrupt level change...

Page 25: ...eir own tastes The tone control can be disabled when not needed 7 4 8 TONE CONTROL LVL setting the tone control levels When the tone control is enabled it is possible to set the level of each band acc...

Page 26: ...istening by loudspeakers is even worse when listening by headphones To reduce the ping pong effect a cross feed circuit must be used As there s no need for cross feeding with more recent recordings th...

Page 27: ...ow frequencies speed and transient response 7 4 11 AUTO OFF setting the automatic switch off To comply with UE requirements regarding energy saving the MARLEY MKII is able to automatically switch off...

Page 28: ...the MARLEY MKII is in standby OFF the LED will be off when the MARLEY MKII is in standby 7 4 13 REMOTE POWER setting the MARLEY MKII to accept ignore the IR remote ON OFF command When the MARLEY MKII...

Page 29: ...KII is used standalone with its stock wall adaptor the latter is the preferred choice On the other hand when the MARLEY MKII is used with the VAN DER GRAAF MKII or any other power supply which is slav...

Page 30: ...ER OUT MODE setting the behaviour of the MARLEY MKII trigger output The MARLEY MKII is provided with a trigger output which can be used to turn on and off another device Depending on whether the devic...

Page 31: ...interface This can be done accessing this menu feature 7 4 17 BT INFO accessing bluetooth interface information It may be useful to know certain information about the MARLEY MKII Bluetooth interface...

Page 32: ...te is required or not This can be accomplished by accessing the menu as one of the items is that related to firmware revisions Of course user can t change the displayed values by the front panel contr...

Page 33: ...control another push on the standby key a power on command from the app on any coupled Bluetooth source or any action on the front panel button Standby mode is indicated by a LED lit on the front pane...

Page 34: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 34 M2Tech www m2tech biz...

Page 35: ...y MkII by the Bluetooth Interface User can control the MARLEY MKII as well as set all operative parameters by any Android and iOS smartphone and tablet thanks to the app developed by M2Tech which will...

Page 36: ...MARLEY MKII HIGH PERFORMANCE HEADPHONES AMPLIFIER REVISION PRA JUNE 2019 Copyright 2019 M2Tech Srl 36 M2Tech www m2tech biz...

Page 37: ...voltage 10Vrms single ended headphones output 300 Ohms load 9Vrms single ended headphones output 8 Ohms load 20Vrms balanced headphones output 300 Ohms load 18Vrms balanced headphones output 8 Ohms lo...

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