LEM FX22 User manual

The lighting flash with arrowshad symbol within an
equilateral triangle is intended to alert the user to the
presence of uninsulated “dangerous voltages” within the
product’s enclosure, that may be of sufficient magnitude to
constitute a risk of electric schok to persons.
The excalamation point within an equilater triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanyng the appliance.
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS PERTAINING A A RISK OF FIRE, ELECTRIC SHOCK OR INJURY A PERSONS
WARNING - When using electric products, basic precautions should always be folowed, including the following.
1. Read all the SAFETY INSTRUCTIONS before using the product.
2. A reduce the risk of injury, close supervision is necessary when the product is used near children.
3. Do not use this product near water - for example, near a bathtub, washbowl. kitchen sink, in a wet basement
or near a swimming pool or the like.
4. This product in combination whit headphones or an amplifier, may be capable of producing sound levels
that could cause permanent hearing loss. Do not operate for a long period of time at high volume level or at
level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an
audiologist.
5. This product should be located so that its location or position does not interfere with its proper ventilation.
6. This product should be located away from heat sources such as radiators, hest register or other product
that produce heat.
/. The product may be connected a a power supply only of the type described on the operating instructions
or as marked on the product.
8. The product may be equipped with a polarized line plug (one blade wider then the other). This is a safety
feature. If you are unable a insert the plug into the outlet, contact an electrician a replace your obsolete
outlet. Do not defeat the safety purpose of the plug.
9. The power-supply cord of the product should be unplugged from the outlet when left unused for a long
period of time. When unplugging the power-supply cord, do not pull on the cord, but grasp it by the plug.
10. Care should be taken so that object do not fall and liquid are not spilled into the enclosure through
openings.
11. The product should be servived by qualified service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the product; or
C. The product has been exposed to rain; or
D. The product does not appear to operate normally or exhibits a marked change in performace; or
E. The product has been dropped or the enclosure damaged.
12. Do not attempt to service the product beyond that described in the user-maintenance instructions.
All other servicing should be referred to qualified service personnel.
13. WARNING - Do not place objects on the product’s power cord or place it in a position where anyone
could trip over, walk on or roll anything over it. Do not allow the product to rest on or to be installed over
power cords of any type. Improper installations os this type create the possibility of fire hazard and/or perso-
nal injury.
SAVE THESE INSTRUCTIONS

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FX
22
Warnings and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PRESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connection examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Contents
Contents

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FX
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Warnings & installation
✔ ✔
✔ ✔
✔ Connection to the mains supply
The unit is supplied with an external power supply. Before switching on the unit, make certain that the
mains voltage matches that shown on the rear (a tolerance of up to ±10% is acceptable).
✔ ✔
✔ ✔
✔ Switching on and off
CAUTION: before switching on or off, make certain the sound system’s amplifiers are off: this will avoid
signal peaks, which are annoying and sometimes dangerous (particularly for speaker enclosures).
✔ ✔
✔ ✔
✔ Connecting and preventing or identifying interference
First of all, check that the apparatus is installed in a place free from industrial or RF (radio frequency)
interference. Avoid installing your equipment very near radio or TV sets, mobile phones, etc., as these
can cause noisy interference.
When connecting the other parts of your sound system, watch out for the so-called “ground loops”, which
could cause hum and jeopardize the products’s excellent Sound-to-Noise and low distortion characteristics.
The best way (even if not always feasible) to avoid ground loops is to connect the electric ground of all
the equipment to a single central point (“star” system). In this case, the central point can be the mixer.
✔ ✔
✔ ✔
✔ Protection and maintenance
Don’t force knobs, switches or faders: these are designed and manufactured to respond to light pressure
and could be damaged if used with excessive force.
Take care of your connector cables, a very frequent cause of small/big problems. Always grip them by
the connector, avoid pulling them forcefully and wind them without forming knots or sharp bends: they’ll
last longer this way, and be more reliable, which is a definite advantage.
Avoid exposing the product to strong direct sunlight, high temperatures or intense vibrations, in very dusty
or particularly damp surroundings or, even worse, in the rain: this will help to avoid the risk of faulty
operation, deterioration or even electric shocks and fires.
The product is built in shock-resistant material. Nevertheless, protect it during transport with a flight-case
to avoid the risk of any casual accidents.
When you’ve finished using the apparatus, it’s always advisable to protect it from dust, but any dust that
does form should be removed using a cloth or a soft brush. Never use alcohol, acetone or any solvents.
The effect does not require any other maintenance.
✔ ✔
✔ ✔
✔ In the event of breakdown
All user-adjustable parts are external and easily accessed.
In the event of a breakdown, do not open the apparatus, but contact the nearest Generalmusic/Lem
Service Centre.
✔ ✔
✔ ✔
✔ Keeping the documentation
Keep this user’s manual for future consultation. Also remember that the effect will get a better price on
the secondhand market if (as well as being in good condition) it has its original documentation and
packaging.
Warnings & installation

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FX
22
Introduction
Congratulations for having chosen FX 22!
LEM FX 22 is a high-quality, extremely user-friendly multi-effect unit which includes TWO
SEPARATE STEREO EFFECT (with separate inputs and output in common).
FX 22 has been designed by LEM around the powerful RED 208 DSP, the same as is
used on the FALCON digital mixer. The 40-bit processing together with the use of 20
and 24-bit converters ensures the maximum audio quality and allows to obtain very rich
and accurate effects.
Each of the two section of the FX 22 includes 11 PRESETS BANKS simple (reverbs,
delays, modulations) or combined (reverb + delay, reverb + chorus), ideal for use with a
wide variety of types of signal: vocals, percussion, string and wind instruments, etc. 11
different variations are available for each PRESET BANK, giving a total of 121 + 121
PRESETS. In this way, you can find stored in the unit’s memories the most common
settings ready for use and all you have to do is choose between them whichever is most
suited to your requirements.
Two rotary selectors, output volume and balance are the only simple controls that give
access to the essential but effective functions of the FX 22. Acting on the appropriate
selector, FX 22 can be used both in DUAL mode, with two effects on two separate signals
or COMBI mode, with two effects in series on the same signal.
Supplied with an external power supply, the FX 22 multi-effect unit comes in half-rack
format (1 unit) and can be installed in a standard 19" rack by using an optional adapter
which can be requested from your dealer (cod. 970.294).
Introduction

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FX
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Getting started
To start using your FX 22,first of all connect the external power supply to the socket on the rear panel,
then to the mains supply.
To discover the unit’s potential, proceed gradually; firstly using one effect on a single instrument, then
two effects simultaneously and lastly, two independent effects on two different instruments.
SITUATION A: 1 INSTRUMENT / 1 EFFECT
To begin to hear and familiarize with the FX 22 presets, it’s advisable to use just one of the multi-effect’s
two sections. Proceed as follows:
1 -Connect the mixer’s EFF SEND (or your instrument’s output) to the FX 22 input A.
2 -Connect the OUTPUT of the FX 22 to the mixer’s EFF RETURN (or the amplifier).
3 -Set the MODE selector at DUAL.
4 -Adjust input level with the FX A INPUT LEVEL potentiometer (rear panel), making certain the red
PEAK LED doesn’t remain permanently lit.
5 -You can now move from one preset to another in the FX A section using the two PRESETS and
VARIATIONS knobs.
6 -Adjust the output level with the OUT potentiometer.
7 -You can set the balance between the original signal and effect using the MIX potentiometer. In the
DRY position, only the original signal is heard, whereas in the WET position, only the result of the
effect is heard.
Getting started

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FX
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Getting started
SITUATION B: 1 INSTRUMENT / 2 EFFECTS
The FX 22 allows you to use two different effects simultaneously on the same signal.
To try out this function, leave the unit connected as for the first experiment, but set the MODE selector
at COMBI: the effects of the two FX A and FX B sections are now summed on the same signal.
Select two different effects (for example Reverb and Delay, or Reverb and Chorus): with the two sections’
OUT and MIX potentiometers: you can now control the quantity and balance of the individual effects. Try
various combinations of intensity and balance.

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FX
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Getting started
SITUATION C: 2 INSTRUMENTS / 2 EFFECTS
In DUAL mode, on the other hand, the FX 22 operates like two completely separate processors and allows
you to process two signals or two different instruments completely independently.
To try out DUAL mode, proceed as follows:
1 -Connect send 1 of the mixer (or the output of the first instrument) to the FX A input.
2 -Connect send 2 of the mixer (or the output of the second instrument) to the FX B input.
3 -Connect the OUTPUT of the FX 22 to the mixer’s EFF RETURN (or to the amplifier).
4 -Set the MODE selector on DUAL.
5 -Adjust the input levels using the INPUT LEVEL potentiometers on the panel rear, making certain the
red PEAK LEDs don’t remain permanently lit.
6-You can now select two independent effects for the two signals by using the PRESETS and
VARIATIONS controls of the two FX A and FX B sections and set the effects’ OUT LEVEL and MIX
as required.

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FX
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Front panel
FX A PRESETS
Rotary selector for choosing the type of preset used by the FX A section.
11 positions are available: 1/6 - Reverbs, 7 - Delay, 8/9 - Modulations, 10/11 - Combo.
FX A PEAK
Peak LED of the FX A section: indicates
that the input signal level is too high. If the
LED lights up briefly, this is acceptable, but
if on the other hand the LED remains
constantly lit, the level must by lowered
(INPUT LEVEL rear panel).
The PEAK LED also flashes when the unit
is momentarily on BYPASS: this occurs when switching on the unit and changing presets. The two PEAK
LEDs flash simultaneously when the unit is put on BYPASS using the pedal connected to the
FOOTSWITCH connector (back panel).
FX A VARIATIONS
Rotary selector for choosing the variations of section FX A’s presets.
Each effect has 11 variations. The variations can modify some of the effect’s parameters, the tempo or
(in some cases) the type of effect obtained. Read the preset specification table for further information on
the variations’ characteristics.
MODE
Selector for the FX 22’s two operating modes: DUAL and COMBI.
FX 22 - DUAL MODE
In DUAL mode, the two FX A and FX B sections work in parallel and completely independently. You
have in actual fact two distinct effects at your disposal, with separate inputs and the same stereo output.
You can therefore connect two different mixer sends or two different instruments to the FX A and FX B
inputs of the effects unit and choose a different effect for each of them.
Front panel

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FX
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FX 22 - COMBI MODE
In COMBI mode, the two sections (FX A and FX B) operate in series and allow you to apply two different
effects to the same signal. To use the COMBI mode, connect the mixer’s send or the instrument’s output
only to the FX A input.
FX B PRESETS
Rotary selector for choosing the type of preset used by the FX B section.
FX B PEAK
The FX B section’s peak LED.
FX B VARIATIONS
Rotary selector for choosing the variations of the FX B section’s presets.
FX A MIX
Potentiometer for adjusting the balance between the original signal and effect’s signal of the FX
A section. Turning it completely to the left (DRY), only the original signal is fed out and completely to
the right (WET), only the processed signal.
FX A OUT
Potentiometer for adjusting the FX A section’s output level.
FX B OUT
Potentiometer for adjusting the FX B section’s output level.
FX B MIX
Potentiometer for adjusting the balance between the original signal and processed signal of the
FX B section.
ON
LED indicating that the unit is switched on.
Front panel
FX A
INPUT FX A LEFT OUT
RIGHT OUT
COMBI FX A FX B
FX A
INPUT FX A
INPUT FX B
LEFT OUT
RIGHT OUT
FX B

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FX
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Rear panel
DC IN
External 12V power supply connector.
FOOTSWITCH
Connector for a footswitch which enables
the BYPASS function. BYPASS status is
indicated by the two PEAK LEDs flashing.
This pedal enables you to switch effects on
and off even if you’re playing and your hands
aren’t free.
OUTPUTS
RIGHT and LEFT (MONO) audio output connectors.
When connecting a mono effect return, use only the LEFT/MONO socket.
FX B
FX B section input connector.
FX B INPUT LEVEL
Adjusts the input level of the FX B section.
The amount of signal is shown by the PEAK LED on the front panel. If the LED lights up briefly, this is
acceptable, but if on the other hand the LED remains constantly lit, the level must by lowered
FX A (COMBI)
FX A section input connector.
In COMBI mode, only connect to this input when using the FX 22 with two effects in series on the same
signal
FX A (COMBI) INPUT LEVEL
Adjusts the input level of the FX A (COMBI) section.
Rear panel

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FX
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PRESETS
The FX 22 has different types of effects, distributed over the 11 PRESET BANKS:
1BRIGHT HALL
2WARM HALL
3ROOM
4VOCAL
5PLATE
6GATE
7DELAY
8CHORUS/FLANGER
9PHASER/ROTARY
10 REV + DELAY
11 REV + CHORUS
COMBOS
REVERBS
FX 22 - PRESET LIST
DELAYS
MODULATIONS
Each PRESET then has 11 VARIATIONS that enable you to adapt the effect to the characteristics of the
signal to be processed. The variations are different in the various PRESETS and regard the value of
individual parameters or the overall type of effect.
In the following pages, we’ll examine the characteristics of the individual PRESETS. The tables relative
to each preset show details of the different values of the parameters programmed in the variations.
PRESETS

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FX
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1. BRIGHT HALL
These are bright HALL Reverbs, full of harmonics at the top end of the spectrum and suitable for wide
general use. These PRESETS are particularly suitable for vocals, wind instruments and percussion. The
variations regard room size, reflecting surfaces, pre-delay and filtering.
Preset Pre-delay Rev Time Room Size HF filter
1Large Hall 22 2.4 54 6.94
2Mid Hall 14 1.5 38 6.94
3Small Hall 12 0.7 20 8.98
4Concert Hall 35 0.9 45 3.21
5Brass Hall 40 1.7 50 8.98
6Crystal Mid 22 1.7 35 thru
7Crystal Small 22 1 27 thru
8Choir Large 40 2.4 50 11.6
9ChoirMid 16 1.7 38 11.6
10 Percussion Mid 16 1.7 35 8.98
11 Percussion Small 20 1.7 5 8.98
2. WARM HALL
This is a warmer HALL than the previous ones and more pronounced in the mid-low spectrum range.
These PRESETS are also suitable for vocals, wind instruments, strings and piano. Here again, the
variations regard room size, reflecting surfaces, pre-delay and filtering.
No. Preset Pre-delay Rev Time Room Size HF filter
1Large Hall 23 2.9 55 1.49
2Mid Hall 14 1.7 38 1.92
3Small Hall 11 0.7 22 1.49
4Large Acoustic 20 1.7 45 1.92
5Small Acoustic 15 1.5 25 2.49
6Concert Hall 35 0.9 45 1.15
7Horn Hall 50 2.1 40 5.37
8Cathedral 50 6.1 55 1.49
9Jazz Club 12 0.6 22 1.92
10 Stadium 50 2.4 55 0.53
11 Theatre 50 1.5 55 0.53
PRESETS

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FX
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PRESETS
3. ROOM
In these 11 variations, you can find practically all the most common ROOM reverb settings. Small and
medium-small rooms quite full of high frequencies or, on the contrary, darker and with less high
frequencies. The majority of the variations are dedicated to percussive sounds (snare drum, kick drum
and toms) and signals with a fast attack.
No. Preset Pre-delay Rev Time Room Size HF filter
1Large Room 15 2.4 57 8.98
2Mid Room 15 1.7 45 5.37
3Small Room 7 0.8 25 2.49
4TomRoom 8 1.3 35 8.98
5BD Room 7 0.8 25 5.37
6SD Room1 4 1.7 35 1.15
7SD Room2 6 0.9 35 1.15
8Small Wood 9 1 30 3.21
9Bright Room 9 1.2 30 8.98
10 Dark Room 12 1.2 25 0.53
11 Studio 8 0.8 15 1.49
4. VOCAL
A series of reverbs suitable for use on vocals. The variations are set according to whether the vocals
are Male or Female with Reverb, Pre-delay and Size times programmed for pieces with different speeds.
No. Preset Pre-delay Rev Time Room Size HF filter
1Female Slow 70 2.9 70 3.21
2Female Mid 401551,15
3Female Fast 30 0.9 15 3.21
4Male Slow 70 2.9 70 4.16
5Male Mid 401550.69
6Male Fast 30 0.9 15 4.16
7Backing Vox 1 70 0.7 50 6.94
8Backing Vox 2 40 0.6 50 8.98
9Backing Vox 3 10 1.3 35 1.15
10 Child Slow 40 1.7 50 2.49
11 Child Fast 15 0.9 28 1.15

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5. PLATE
The classic simulation of a plate reverb, still very often used on vocals and drums. The variations are
divided into four groups (Drums, Piano, Vocal and Choir), with the possibility of choosing between different
room size, realized with increasing values of Pre-delay, Rev Time and Room Size.
No. Preset Pre-delay Rev Time Room Size HF filter
1Drums Small 6 0.9 10 6.94
2Drums Mid 8 1.2 22 5.37
3Drums Large 40 3.6 22 8.98
4Piano Small 15 0.6 5 11.6
5Piano Mid 25 2.1 42 11.6
6Piano Large 20 1.3 42 5.37
7VocalSmall 15 1 15 1.15
8VocalMid 33 2.1 45 6.94
9VocalLarge 70 3.6 60 5.37
10 ChoirSmall 14 1 20 6.94
11 Choir Large 35 2.1 45 6.94
6. GATE
All the classic GATE Reverbs able to be used on drums (particularly kick drum and snare) have been
programmed.
This PRESET BANK also contains some reverbs ideal for use with vocals or brass sections and particularly
suited to very fast phrases and patterns.
No. Preset Pre-delay Rev Time Room Size HF filter
1Drums Gate 1 8 1.5 27 6.94
2Drums Gate 2 8 1.2 22 5.37
3SD Gate 6 0.9 35 1.15
4BD Gate 7 0.8 25 5.37
5Percussion Gate 7 1.2 23 6.94
6VocalGate 40 0.6 80 8.98
7Brass Gate 40 1.7 50 8.98
8RhythmGate 20 1.5 30 8.98
9Long Gate 8 1.5 27 6.94
10 Strong Cut 1 10 1.2 20 3.21
11 Strong Cut 2 10 0.8 20 3.21
PRESETS

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FX
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PRESETS
7. DELAY
This preset’s variations include stereo delay, mono delay, bouncing delay, tape-back and some special
effects. Tempo is indicated in BPM: 75,100, 110,120,132,160. With these figures, you can synchronize
the delay with a piece’s tempo.
No. Preset Left Delay Right Delay Left F.B. Right F.B.
1Stereo 75 bpm 200 400 0,47 0,23
2Stereo 110 bpm 272 545 0,47 0,23
3Stereo 120 bpm 250 500 0,5 0,23
4Stereo 132 bpm 227 454 0,5 0,23
5Stereo 160 bpm 187 375 0,5 0,23
6Bounce 100 bpm 300 150 0 0
7Bounce 120 bpm 500 250 0 0
8Tape Back 35 75 0,1 0,1
9R&R 70 81 0,19 0,18
10 Robotica 20 10 0,5 0,58
11 Tube 35 35 0,53 0,52
8. CHORUS/FLANGER
Variations 1 - 6 have CHORUS effects for vocals, guitar and keyboards. Variations 7 - 11 give FLANGER
effects, particularly effective on guitar, with different Feedback values.
No. Preset Mod. Freq. Mod. Depth Pan. Depth Left F.B. Right F.B.
1Vocal Chorus 1 0.7 0.8 0 - -
2Vocal Chorus 2 1.5 0.675 0.14 - -
3Guitar Chorus 1 0.6 0.615 0.29 - -
4Guitar Chorus 2 0.3 0.87 0.25 - -
5Rich Chorus 1 0.87 0.29 - -
6Vibra Chorus 5.2 0.165 0.045 - -
7Moving Flanger 1.5 0.255 0.475 0,6 0,6
8Guitar Flanger 1.5 0.43 0 0,58 0,57
9Rich Flanger 1.5 0.665 0.43 0,68 0,48
10 Large Flanger 0.1 0.895 0.165 0,68 0,75
11 UnderWater 4.7 0.86 0.545 0,58 0,77

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FX
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9. PHASER/ROTARY
PHASERS are among the best-known modulation effects and the first five variations have some of the
most common settings for use with this effect. ROTARY, TREMOLO and LESLIE effects are available in
Fast and Slow versions.
No. Preset Mod. Freq. Mod. Depth F.B. LPF Fast/Slow
1Fast Phaser 6.1/0.8 0.675 0,65 -19 -
2Mid Phaser 0.8 0.675 0,65 -19 -
3Slow Phaser 0.5/0.8 0.675 0,65 -19 -
4Funky Phaser 1/2 0.58/0.575 0,31 -6 -
5Large Phaser 0.5/0.2 1 79%/78% -6 -
6Slow Rotary ----SLOW
7Fast Rotary ----FAST
8Fast Tremolo ----FAST
9SlowTremolo ----SLOW
10 Hard Rotation 16.3/19.6 0.43/0.44 55%/53% 0 -
11 Sweet Rotation 3.8/11.2 0.43/0.115 31%/33% 0 -
10. REV + DELAY
This section of so-called COMBO effects combines Reverbs and Delays on the same section of the unit.
The variations are ideal for a wide range of uses, from vocals to percussion and guitar, with some special
ambient effects.
No. Preset Pre-delay RevTime Room Size HF filter Left Delay Right Delay Left F.B. Right F.B.
1Heavy Vocals 5 4.5 30 3.21 300 150 0,24 0,6
2Soft Vocals 20 1 15 6.94 111 150 0 0
3Percussion Hall 16 1.7 35 8.98 200 100 0,45 0,45
4Small Reflections 16 1 15 8.98 100 90 0,05 0,05
5Plate Delay 18 1.7 20 8.98 300 150 0,38 0,6
6Speed Room 18 2.4 14 24 340 112 0,16 0,38
7Gymnasium 225 1.5 20 6.94 200 209 0,38 0,38
8Smooth Church 20 2.1 38 3.21 150 250 0,54 0,29
9Backing Vox 20 1.7 30 6.94 111 150 0 0
10 Back Gate 5. 0.6 10 6.94 200 300 0 0
11 Guitar Box 5 1.7 30 6.94 10 8 0,71 0,71
PRESETS

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FX
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11. REV + CHORUS
This COMBO section contains combinations of Reverb and Chorus.
No. Preset Pre-delay RevTime Room Size HF filter Mod. Freq. Mod. Depth Mod. Pan
1Heavy Vocals 15 2.1 20 1.15 0.6 0.86 0.6
2Soft Vocals 8 1 40 4.16 0.6 0.675 0.6
3Backing Vox 1 38 1.2 43 8.98 2.4 0.835 0.37
4Backing Vox 2 125 2.1 20 8.98 2.4 0.63 0
5Guitar Combo 8 1.2 30 8.98 1 0.835 0.395
6Electric Hall 15 1.7 30 5.37 7.1 0.475 0.755
7Soft Chords 10 1.3 15 11.6 1 1 0.475
8RoomCombo 15 0.8 30 1.49 8.9 0.475 0
9New Gothic 5 2.9 40 1.49 1.5 0.475 0.755
10 Ambience 50 2.1 20 8.98 2.4 0.63 0
11 Reflections 125 1.2 10 8.98 0.6 0.835 0.475
NB: COMBO PRESETS are particularly effective in DUAL mode when, processing two different signals
on the two lines of the FX 22, you have a total of four different effects at your disposal from just one unit.
PRESET sticker
The complete list of the FX 22’s 121 PRESETS is printed on the unit’s cover. In addition, along with this
manual you’ll find a useful sticker which can be used as a quick reminder and which can be applied, for
example, to the free half of the optional rack adapter (cod. 970.294).
PRESETS

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FX
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Connection examples
Connection examples
The LEM FX 22 can be connected using normal unbalanced jack connectors.
Connection to the mixer - DUAL mode
UNBALANCED JACK connector

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FX
22
Connection to an instrument amplifier
Connection examples
Connection to the mixer - COMBI mode