Glab Midi 2 x Loop User manual

Instrukcja obsługi
User Manual
Bedienungsanleitung
Midi 2 x Loop
4

1
Version 1.0
Dear Customer,
Congratulations for choosing our G LAB product!
MIDI 2 x LOOP (M2L) is a loops’ switcher controlled by MIDI interface
(by Program Change or Control Change commands) or manually, by using
the buttons on the top of the device. Using the MIDI commands it is also
possible to mute the signal (e.g. for silent tuning). M2L can be controlled by
every MIDI controller and it is particularly recommended as an extension of
the G LAB guitar system controllers GSC. Due to its passive signal path it is
also possible to use the M2L as an A/B/Y switcher.
Basic characteristics:
- two bypassed (by electro mechanic relay) loops to connect the pedal
effects or serially connected sets of effects,
- muting circuit based on opto elements,
- MIDI THRU connector to connect other MIDI devices,
- power supply and active loop indicators,
- two buttons for loops’ manual on/off switching,
- power supply 9V DC (direct current).

2
Structure
1 - MIDI channel settings switcher 6 - LOOP 2 signal output (SEND)
2 - signal OUTPUT connector 7 - signal INPUT connector
3 - LOOP 2 signal input (RETURN) 8 - power supply connector
4 - LOOP 2 signal output (SEND) 9 - MIDI input
5 - LOOP 1 signal input (RETURN) 10 - MIDI copy (THRU)
1 - Power supply indicator
2 - Loop 1 status indicator
3 - Loop 1 control button
4 - Loop 2 control button
5 - Loop 2 status indicator

3
Scheme and signal path description
M2L has true passive signal path (without signal boosting and buffering
elements). Owing to this the M2L doesn’t influence the guitar tone (doesn’t
change the tone and doesn’t cut the signal). It is recommended to use the
switcher button to exclude from the effects’ signal path the effects without
true bypass function. Controlling by MIDI provide galvanic separation from
controlling device. It is recommended to use 9V DC from separated source.
Every time after switching on the power supply both effect loops are switched
off and the signal path is “opened”.
Manual loops switching
To manual loops switching there are used two buttons signed LOOP1
and LOOP2. To switch on/off the loop press corresponding button.
MIDI channel setting
To set the MIDI channel use the rotatable knob signed as MIDI
CHANNEL. To switch the channel use the small screwdriver to turn smoothly
central part of the switcher to the right or to the left. The arrow-head indicates
set channel (letter A, B, C, D, E, F correspond successively with the channel
numbers 10, 11, 12, 13, 14, 15, and number 0 indicates channel 16).
MIDI functions:
Table below contains full functionality of the MIDI commands of M2L
device.

4
Power supply
M2L should be supplied from 9V (DC) external adaptor (efficiency 60 mA
or more). Before plugging the power supply check the pin polarisation.
ATTANTION!: Damage of the M2L caused by improper power supply causes
the loss of the warranty.
Possible using of the M2L
Below are shown the possible schemes of M2L connection with the guitar
system.

5
Scheme of M2L connection to the amp’s effect loop

6
Scheme of extending GSC with two effect loops

7
A/B/Y switcher

8
Two stereo effects’ switcher (TRUE BYPASS)

9
Parameters:
Dimensions (depth x width x height) 205 x 70 x 38 mm
Weight 450 g
Maximal input signal 30 dBu
Power supply 9V DC (8,7 do 9,4V), 60mA

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11
EMC/EMI & Certificate of conformity
EMC/EMI
This device has been designed and manufactured to conform with directives
and standards in the field of safety operations and electromagnetic
interference.
This device uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference
to radio communications. However in spite of performing below standards
there is no guarantee that interference will not occur in a particular
installation. If this device does cause harmful interference to radio or
television reception which can be determined by turning the device on and
off, the user is encouraged to try to correct the interference by one or more of
the following operations:
●Reorient or relocate the receiving antenna.
●Increase the separation between the device and receiver.
●Connect the device into an outlet on a circuit different from that to
which the receiver is connected.
●Contact with the manufacturer.
●Consult the dealer for help.
Certificate of Conformity
ELZAB S.A., ul. Kruczkowskiego 39, 41-813 Zabrze, Poland,
hereby declares on own responsibility that the following product:
MIDI 2 x LOOP (G LAB M2L)
that is covered by this certificate and marked with CE 07 label conforms with
following standards:
PN-EN 60065:2004 Safety requirements for mains operated electronic and
related apparatus for household and similar general use
PN-EN 55103-1:1998 Product family standard for audio, video, audio-visual and
entertainment lighting control apparatus for professional
use. Part 1: Emission.
PN-EN 55103-2:1998 Product family standard for audio, video, audio-visual and
entertainment lighting control apparatus for professional
use. Part 2: Immunity.
with reference to regulations in following directives:
73/23/EEC, 2004/108/EEC
Issued in Zabrze, August 2008
Jerzy Biernat
President of the ELZAB S.A. Board of Directors

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DO NOT PLACE THIS PRODUCT INTO THE WASTE CONTAINER !
This device is marked with a cross-lined waste container symbol
according to 2002/96/EU Directive on Waste Electric and Electronic
Equipment.
Such marking informs that after usage equipment can not be trashed
together with other household waste.
An user obligation is to return wasted equipment to a party collecting wasted
electric and electronic equipment. Parties collecting such equipment organise a
system, including local collection points, shops and other units, allowing to
return such equipment. This Directive assures an user free of charge utilisation
of such delivered equipment.
This device is made of materials which can be recycled or utilised after becoming out of
use. Proper handling of wasted electric and electronic equipment reduce demand for row
materials and contribute in avoiding harmful consequences for environment and health of
people caused by dangerous components and not proper storing and utilising of such
equipment.
Owner Manual, Drawing No. G31INA00

Nr rys. G03IN000
COMPANY ADDRESS
ELZAB S. A.
ul. Kruczkowskiego 39, 41-813 Zabrze, Poland
phone [phone], fax [phone]
Web site .................................................................
www.glab.com.pl
Export Department ................................................
phone [phone] inter. 34,
[phone] inter. 366
e-mail: rydy[email protected]om.pl
Technical Support ..................................................
phone [phone]
[phone] inter. 419, 220
e-mail: [e-mail]