Alto L-8 User Manual
User's Manual
8-CHANNEL MIXING CONSOLE
L-8
WITH DIGITAL EFFECTS
R
LTO
www.altoproaudio.com
Version 1.2 August 2004
English
SAFETY RELATED SYMBOLS
CAUTION
RISK OFELECTRIC SHOCK
DO NOTOPEN
This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
This symbol, wherever used, alerts you to important operating and maintenance instructions.
Please read.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
WARNING
Describes precautions that should be observed to
prevent the possibility of death or injury to the user.
the recommended fuse type as indicated in this
manual. Do not short-circuit the fuse holder. Before
replacing the fuse, make sure that the product is
OFF and disconnected from the AC outlet.
Protective Ground
Before turning the product ON, make sure that it is
connected to Ground. This is to prevent the risk of
electric shock.
Never cut internal or external Ground wires. Likewise,
never remove Ground wiring from the Protective
Ground Terminal.
Operating Conditions
Always install in accordance with the manufacturer's
instructions.
To avoid the risk of electric shock and damage, do
not subject this product to any liquid/rain or moisture.
Do not use this product when in close proximity to
water.
Do not install this product near any direct heat source.
Do not block areas of ventilation. Failure to do so
could result in fire.
Keep product away from naked flames.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
WARNING
Power Supply
Ensure that the mains source voltage (AC outlet)
matches the voltage rating of the product. Failure
to do so could result in damage to the product and
possibly the user.
Unplug the product before electrical storms occur
and when unused for long periods of time to reduce
the risk of electric shock or fire.
External Connection
Always use proper ready-made insulated mains
cabling (power cord). Failure to do so could result
in shock/death or fire. If in doubt, seek advice from
a registered electrician.
Do Not Remove Any Covers
Within the product are areas where high voltages
may present. To reduce the risk of electric shock do
not remove any covers unless the AC mains power
cord is removed.
Covers should be removed by qualified service
personnel only.
No user serviceable parts inside.
Fuse
To prevent fire and damage to the product, use only
IMPORTANT SAFETY INSTRUCTIONS
Read these instructions
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
Only use attachments/accessories specified by the
manufacturer.
Power Cord and Plug
Do not tamper with the power cord or plug. These are
designed for your safety.
Do not remove Ground connections!
If the plug does not fit your AC outlet seek advice from
a qualified electrician.
Protect the power cord and plug from any physical
stress to avoid risk of electric shock.
Do not place heavy objects on the power cord. This
could cause electric shock or fire.
Cleaning
When required, either blow off dust from the product
or use a dry cloth.
Do not use any solvents such as Benzol or Alcohol.
For safety, keep product clean and free from dust.
Servicing
Refer all servicing to qualified service personnel only.
Do not perform any servicing other than those instructions contained within the User's Manual.
1
PREFACE
Dear Customer:
Thanks for choosing LTO L-8 8-Channel Mixing Console With Digital Effects and thanks for choosing one of the results
of LTO AUDIO TEAM's work and researches.
For our LTO AUDIO TEAM, music and sound more than a job... are first of all passion and let us say... our
We have been designing professional audio products for a long time in cooperation with some of the major brands
in the world in the audio field.
The LTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R&D centers in Italy, Netherlands, United Kingdom and a large range of state of the art algorithms which have been developed
by our Software Team for the last 7 years.
Because we are convinced you are the most important member of LTO AUDIO TEAM and the one confirming the quality
of our job, we like to share with you our work and our dreams paying attention to your suggestions and your comments.
Following this idea we create our products and we will create the new ones! From our side, we guarantee you and we
will guarantee you also in future the best quality, the best fruits of our continuous researches and the best prices.
Our LTO L-8 8-Channel Mixing Console with Digital Effects has 4 mono (these are provided with Ultra Low Noise microphone
preamplifiers and Phantom Power at +48 Volt) and 2 stereo input channels, and each of them is provided witha3bands
graphic equliser for HI, MID and LOW controls. It is specifically designed for professional appliance.
To our surprise, it provides 24 bits digital stereo effect processor with 256 presets and small and exquisite modeling.
Seeing is believing, let's meet the LTO L-8.
Nothing else to add, but we would like to thank all the people that made the LTO L-8 8-Channel Mixing Console with
Digital Effects a reality available to our customers, and thank our designers and all the LTO staff, people who make
possible the realization of products containing our idea of music and sound and are ready to support you, our customers,
in the best way, conscious that you are our most important member.
obsession!
Thank you very much
LTO AUDIO TEAM
2
TABLE OF CONTENTS
1.INTRODUCTION...................................................................................................................................................4
2.FEATURES...........................................................................................................................................................5
3.READY TO START?...............................................................................................................................................6
4.CONTROL ELEMENTS.......................................................................................................................................7
4.1 The mono MIC/LINE channels.....................................................................................................................8
4.2 INPUT LEVEL setting...................................................................................................................................8
4.3 LOW-CUT FILTER........................................................................................................................................8
4.4 STEREO INPUTS........................................................................................................................................9
4.5 The 3 BANDS EQUALISER..........................................................................................................................9
4.6 AUX SEND..................................................................................................................................................10
4.7 PAN............................................................................................................................................................10
4.8 PEAK..........................................................................................................................................................10
4.9 LEVEL.........................................................................................................................................................10
4.10 INSERT.......................................................................................................................................................10
4.11 MASTER SECTION ...................................................................................................................................11
-MAIN MIX LEVEL
-LED METER
-2 TRACK signal path
-AUX RETURN
-POWER LED
-PHANTOM LED
-PHONES/CONTROL ROOM
-24 BIT DIGITAL EFFECTS
-DFX FOOTSWITCH
-PHONES
-STEREO AUX RETURN
-AUX SEND 1 AND 2
-2-TRACK IN/OUT
4.12 REAR PANEL .............................................................................................................................................13
-POWER
-PHANTOM
-AC INLET WITH FUSE HOLDER
-MAIN MIX OUTPUT
-CONTROL ROOM OUTPUT
5.INSTALLATION AND CONNECTION.....................................................................................................................14
6.FOR THE EXPERTS WHO WANT TO KNOW MORE..........................................................................................17
7. PRESET LIST........................................................................................................................................................18
8.SYSTEM BLOCK DIAGRAMS.............................................................................................................................25
9.TECHNICAL SPECIFICATION..............................................................................................................................26
10.WARRANTY.........................................................................................................................................................28
3
1. INTRODUCTION
Thank you very much for expressing your confidence in products by purchasing L-8 8 Channel MixingLTO LTO
Console with Digital Effects. The L-8 8 Channel Mixing Console with Digital Effects is a professional compact mixer.
You will get the smooth, accurate more natural and open sound from this apparatus, and it is really ideal for small gigs,
recording and fixed PA installations.
The L-8 8 Channel Mixing Console with Digital Effects is packed with feature that can not be found in other consoles
of its size: 4 mono (these are provided with Ultra Low Noise microphone preamplifiers and Phantom Power at +48 Volt)
and 2 stereo input channels, and each of them is provided with a 3 bands graphic equaliser for HI, MID and LOW
controls; 24 bit effects processor; 256 effects (16 presets 16 variations); 2 AUX sends with separate level control on each
channel; highly accurate 12-segment bar graph meters and ultra low noise discrete MIC pre-amps with +48V Phantom
power and 2-Track inputs assignable to main mix, control room / headphone outputs.
Your L-8 is very easy to operate but we advise you to go through each Section of this Manual carefully. In this way
you will get the best out of your L-8.
4
2. FEATURES
The L-8 8 Channel Mixing Console with Digital Effects is designed for professional appliance. It will provide the following
features:
5 MIC input channels with gold plated XLRs and balanced LINE input
2 stereo input channels with balanced TRS jacks
Ultra-low noise discrete MIC pre-amps with +48V Phantom power
Extremely high headroom offering more dynamic range
Balanced inputs for highest signal integrity
Warm, natural 3-band EQ on each channel
24 bit digital effects processor
256 effects (16 presets 16 variations)
Effect on/off by means of MUTE switch or a footswitch connected to the DFX FOOTSWITCH
Switch-able Low-cut filter on each mono channel
Peak LED on each channel
AUX send 2 switch-able to PRE/POST fader
AUX send 1/2 per channel for external effects and monitoring
Control room and headphone outputs
2-Track inputs assignable to main mix, control room / headphone outputs
Highly accurate 12-segment bar graph meters
Inserts on MIC channels
5
3. READY TO START?
3.1 Please check the AC Voltage available in your Country before connecting your L-8 to the AC socket.
3.2 Be sure that the main power switch is turned off before connecting the Mixer to the AC socket. Also, you should
make sure that all Input and Output Controls are turned down. This will avoid damages to your speakers and avoid
excessive noise.
3.3 Before turning on the L-8 you shall connect it to a power amplifier and turn-on the mixer BEFORE the power amplifier.
Once you have finished your working session you shall turn the mixer off AFTER the power amplifier.
3.4 Before disconnecting the L-8 always turn-off the Power switch.
3.5 Do not use solvents to clean your L-8. A dry and clean cloth will be OK.
6
4. CONTROL ELEMENTS
MIC 1
3
LINE IN 1
TRIM
+15dB -45dB LINE
0dB 60dB MIC
0
+15+15-15-15
0
+12-12
0
+15+15-15-15
0
1
8
-+15
0
2
/
D
F
X
8
-+15
LEFT
RIGHT
0
MIC 2 MIC 3 MIC 4
12
BAL OR
UNBAL
LOW CUT
75Hz
18dB/Oct
EQ
HI
12kHz
MID MID MID MID MID MID
2.5kHz
LOW
80Hz
AUX
1
PRE PRE PRE PRE PRE PRE
2
/
POST
D
(PRE)
F
X
PAN
PEAK
12
3
BAL OR
UNBAL
LINE IN 2
TRIM
+15dB -45dB LINE
0dB 60dB MIC
LOW CUT
18dB/Oct
0
+15+15-15-15
0
2.5kHz
+12-12
0
+15+15-15-15
0
AUX
8
-+15
0
8
-+15
PAN
LEFT
RIGHT
0
75Hz
EQ
HI
12kHz
LOW
80Hz
POST
(PRE)
PEAK
3
LINE IN 3
TRIM
+15dB -45dB LINE
0dB 60dB MIC
0
+15+15-15-15
0
+12-12
0
+15+15-15-15
0
1
8
-+15
0
2
/
D
F
X
8
-+15
LEFT
RIGHT
0
12
BAL OR
UNBAL
LOW CUT
75Hz
18dB/Oct
EQ
HI
12kHz
2.5kHz
LOW
80Hz
AUX
POST
(PRE)
PAN
PEAK
3
LINE IN 4
TRIM
+15dB -45dB LINE
0dB 60dB MIC
0
+15+15-15-15
0
+12-12
0
+15+15-15-15
0
1
8
-+15
0
2
/
D
F
X
8
-+15
LEFT
RIGHT
0
STEREO AUX RETURN AUX SEND
LEFT(MONO)
1
12
BAL OR
UNBAL
LEFT
3
MIC (MONO)
2
12
TRIM
LOW CUT
75Hz
18dB/Oct
2.5kHz
AUX
PAN
EQ
HI
12kHz
LOW
80Hz
POST
(PRE)
PEAK
0dB 60dB MIC
0
0
0
0
1
8
-+15
0
2
/
D
F
X
8
-+15
LEFT
RIGHT
0
EQ
12kHz
+15+15-15-15
2.5kHz
+12-12
LOW
80Hz
+15+15-15-15
AUX
POST
(PRE)
BAL
PEAK
RIGHT
RIGHT
1
2
LINE IN 5/6 LINE IN 7/8
LEFT (MONO)
RIGHT RIGHT
0
HI
+15+15-15-15
0
+12-12
0
+15+15-15-15
0
1
8
-+15
0
2
/
D
F
X
8
-+15
LEFT
RIGHT
0
LEFT (MONO)
EQ
HI
12kHz
2.5kHz
LOW
80Hz
AUX
POST
(PRE)
BAL
PEAK
2-TRACK IN/OUT
L
R
TAPE IN TAPE OUT
DFX
FOOTSWITCH
PHONES
1
16
2
3
15
14
13
12
11
7
8
10
9
1
16
2
3
15
14
13
12
11
7
8
10
9
0
8
-+15
AUX2/DFX TO AUX 1
0
8
-+15
AUX RTN 1
0
8
-+15
AUX RTN 2
(DFX)
LTO
8-CHANNEL MIXING CONSOLE
WITH
DIGITAL EFFECTS
1. VOCAL 1
2. VOCAL 2
PRESETS
POWER
PHANTOM
3. LARGE HALL
4. SMALL HALL
5. LARGE ROOM
6. SMALL ROOM
7. PLATE
8. TAPE REVERB
9. SPRING REVERB
10. MONO DELAY
11. STEREO DELAY
12. FLANGER
13. CHORUS
14. REVERB + DELAY
15. FLANGERREVERB +
16. REVERB + CHORUS
DFX MUTE
PEAK
CLIP
LR
10
7
4
4
5
6
4
5
6
VARIATIONS
2
0
-2
-4
2TK TO
MIX
-7
-10
-20
OUTPUT
-30
0
2TK TO
CTRL ROOM
R
LEVEL
L-8
8
-+15
LEVEL
1
8
-+15
LEVEL
2
8
-+15
LEVEL
3
8
-+15
LEVEL
4 5/6
8
-+15
LEVEL
7
8
-+15
LEVEL
7/8
-
PHONES /
8
MAX
CONTROL
ROOM
8
-+15
MAIN MIX LEVEL
4.1 The mono MIC/LINE channels
1
These are Channel 1 through Channel 4. You can connect balanced, low impedance microphones to the XLR socket. On the 1/4" phone jack you can
connect either a microphone or a line level instrument. You shall never connect
an unbalanced microphone to the XLR socket if you do not want to damage
both the Microphone and the Mixer.
48 Volt phantom power
4
It is available only to the XLR Mic sockets. Never plug in a microphone when
phantom power is already on. Before turning phantom power on, make sure
that all faders are all the way down. In this way you will protect your Stage
Monitors and Main Loudspeakers.
4.2 INPUT LEVEL setting
2
This Control is provided with 2 different indication rings: One is
for the Microphone and the other for the Line levels. When you
use a microphone you shall read the OUTSIDE ring (0-60 dB),
When you use a Line level instrument you shall read the INSIDE
ring (+15~-45 dB). For optimum operation you shall set this control
in a way that the peak LED will blink also occasionally in order to
avoid distortion on the input channel.
MIC 1
12
3
BAL OR
UNBAL
LINE IN 1
TRIM
+15dB -45dB LINE
0dB 60dB MIC
LOW CUT
75Hz
18dB/Oct
1
2
3
4.3 LOW-CUT FILTER
POWER
ON
OFF
3
PHANTOM
By pressing this button you will activate a 75 Hz low frequency filter with a slope of 18 dB per octave. You can use
this function to reduce hum and stage rumble when using microphones.
4
8
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