Glab 6 x LOOP EXTENSION User manual

MAIN POWER MODULE MPM-1
SEND RETURN FOOTSWITCH INPUT
6x LOOP EXTENSION 6LE
6x LOOP EXTENSION 6LE
GUITAR SYSTEM CONTROLLER GSC-5
6x LOOP EXTENSION 6LE
MAIN POWER MODULE MPM-1
GUITAR SYSTEM CONTROLLER GSC-5
MIDI INMIDI THRU
MIDI IN
FOOTSWITCH INPUT SEND RETURN
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Edition 1.0
Dear Customer!
Thank you for choosing our product.
The 6 x LOOP EXTENSION (6LE) module is the effects loop switcher (looper)
for the GSC controllers (e.g. GSC-5) equipped with EXTENSION OUTPUTS
(EXT OUT).
Basic features:
- passive signal path
- 6 effects loops with TRUE BYPASS based on electro mechanic relays
- possibility to switch on (by relay) the input buffer with impedance of 1
Mohm (the same as in the tube amps)
-TUNER output with very high input impedance buffer
- silent tuning function
- power supplying and controlling by the GSC controller with a use of
a single cable
- working in the mode of 2 (or 3) effects “at the front” and 3 (or 2) effects
on the amp FX loop
Package content
6LE module 1 pc
EXT 80 cm cable 1 pc
EXT 50 cm cable 1 pc
Velcro fastener 4 pairs
Structure
1 - LOOP4 ground connection switch 7 - EXT IN/OUT connectors
2 - LOOP3 ground connection switch 8 - LOOP1 SEND connector
3 - LOOP state indicators 9 - LOOP1 RETURN connector
4 - BUFFER state indicator 10 - Signal OUTPUT
5 - POWER supply indicator 11 - TUNER signal output
6 - DIP switches 12 - Signal INPUT

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3
Connecting the 6LE module to the controller
The 12V power supply and the controlling signal comes from the EXT OUT
connector of the GSC-5 controller. The EXT IN/OUT connector of the 6LE
module should be connected with EXT OUT output of the GSC-5 foot
controller or of the MPM-1 power supply module or with EXT IN/OUT
connector of already connected the 6LE module. For connecting use one of
the cables supplied with the module.
The DIP switches enable to choose a section (A, B or C) for a given 6LE
module in the guitar system.
In case of building the stereophonic system the 6LE modules should be set in
pairs in the same section (A, B or C). In this way the same loops will be
switched simultaneously on the left and right channel.

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The LOOP3 and LOOP4 GROUND CONNECTION switches
The 6LE module can be connected between guitar and an amp input (“at the
front”) or on amp serial effect loop (FX LOOP). In this cases the LOOP 3
GND and LOOP 4 GND switches should be set to ON position.
The 6LE enables to connect 2 (or 3) effects “at the front” and 3 (or 2) effects
on the amp FX LOOP. In this case the SEND and RETURN connectors of the
LOOP 3 (or LOOP4) play correspondingly the role of signal OUTput and
INput. The LOOP3 GND CON switch (or LOOP 4 GND CON) should be set
then to OFF position to avoid the ground loop occurring.

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The table below shows the quantity of the loops “at the front” and on the FX
LOOP depending on the quantity of used 6LE modules connected to the
GSC-5.
Quantity
of 6LE
modules
Effects
„at the
front”
Effects
on the
FX LOOP
Quantity
of 6LE
modules
Effects
„at the
front”
Effects
on the
FX LOOP
23 215
132 314
29 612
38 89
66 98
83 126
2
92 143
3
15 2
Signal path
The buffer (z-buffer) with input impedance of 1 Mohm (same as in the guitar
tube amps) enables to boost the signal power (without the voltage increase).
Adding the buffer between the guitar and the effect can improve guitar sound
(due to low input impedance many of the effects change the guitar tone) and
enable to avoid high tones losses when using long cables between the
controller and the amp (caused by cables’ parasitic capacitance appearing
when all the effects are switched off). Signal from INput, retrieved by very
high impedance tuner buffer (10 Mohm), is transfered to the TUNER output.
It enables to use the tuner also while playing.
The SEND outputs of the effects loops should be connected with effects
INputs and the RETURN inputs of the effects loops should be connected with
OUTputs of individual effects. The MUTE block silents the signal during the
silent tunning and mutes the switching clicks. The 6LE features three levels
(LOW, MID and HIGH) of clicks muting wihich can be set in the SETUP > ↓>
CLICK PROTECTION function for each A, B, C section separately. For the
modules placed “on the front” it is recommended to set the MID or HIGH level
and for the modules connected to the effects loop it is recommended to set
the LOW or MID level.

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Mounting
In case of mounting inside the foot controller or to the pedalboard use the
velcro fasteners supplied with the device. The module should be mounted in
the proper place to avoid accidental ground connection of JACK connectors
or 6LE housing to other conducting elements. It could lead to the ground
loops occurring provoking the hums in speakers. In case of mounting to the
rack 19’ systems it is recommended to use the GLAB 1U FRONT PANEL
RMS (product code 00831) which comes together with screws and isolating
masks assuring the ground separation of individual modules.
Technical parameters
Dimensions: width 330 mm
depth 72 mm
height 35 mm
Weight 0,85 kg
Buffer input impedance 1 Mohm
Maximal signal transmitted by
input buffer +17dBu (+15dBV, 16Vpp)
Output impedance of input buffer 700 ohm
Input impedance of tuner buffer 10 Mohm

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FCC Compliance
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, 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,
there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encou-
raged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
– Consult the dealer for help.
Declaration of Conformity
ELZAB S.A., ul. Kruczkowskiego 39, 41-813 Zabrze, Poland,
declare under sole responsibility, that the following product:
G LAB/6 x LOOP EXTENSION (G LAB 6LE)
conforms with requirements of the EC Council Directives:
●2006/95/EEC Low Voltage Directive,
●2004/108/EEC Electromagnetic Compatibility,
and holds CE mark. Above named product conforms with the following standards:
●PN-EN 60065:2004 /EN 60065:2002/ Audio, video and similar apparatus -
Safety requirements.
●PN-EN 55103-1:2000 /EN 55103-1:1996/ Electromagnetic compatibility -
Product family standard for audio, video, audio-visual and entertainment
lighting control apparatus for professional use - Part 1: Emission
●PN-EN 55103-2:2001 /EN 55103-2:1996/ Electromagnetic compatibility -
Product family standard for audio, video, audio-visual and entertainment
lighting control apparatus for professional use - Part 2: Immunity
Jerzy Biernat
President of the ELZAB S.A. Board of Directors
Copy of original EC declaration of conformity is available for download on our
webside http://www.glab.com.pl

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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.
User Manual, Drawing No. G83INA00

MAIN POWER MODULE MPM-1
SEND RETURN FOOTSWITCH INPUT
6x LOOP EXTENSION 6LE
6x LOOP EXTENSION 6LE
GUITAR SYSTEM CONTROLLER GSC-5
6x LOOP EXTENSION 6LE
MAIN POWER MODULE MPM-1
GUITAR SYSTEM CONTROLLER GSC-5
MIDI INMIDI THRU
MIDI IN
FOOTSWITCH INPUT SEND RETURN
E
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P
1
W
A
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