Alto Professional L-6 User Manual

User's Manual

6-CHANNEL MIXING CONSOLE

L-6

WITH DIGITAL EFFECTS

R

LTO

www.altoproaudio.com

Version 1.0 September. 2003

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.

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.

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.

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.

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

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:

Thank you for choosing the LTO L-6 6-Channel Mixing Console with Digital Effects, which is the result of our LTO
AUDIO TEAM's endeavours.

For the LTO AUDIO TEAM, music and audio are more than a profession, it is a passion and an obsession!

We have, in fact, been designing professional audio products for a number of years in cooperation with many of the
world's major brands.
The LTO line represents unparalleled analogue and digital products made by musicians, for musicians. With our
design centres in Italy, the Netherlands, and the United Kingdom we provide you with world-class designs, while our
software development teams continue to develop an impressive range of audio specific algorithms.

By purchasing our LTO products you become the most important member of our LTO AUDIO TEAM. We would
like to share with you our passion for what we design and invite you to make suggestions, which will aid us in develop­ing future products for you. We guarantee you our commitment for quality, continual research and development,
and of course the best prices.

The LTO L-6 is an extremely flexible, ultra-low noise 6-Channel Mixing Consol with Digital Effects, which is the
smallest among our range of mixing consoles with digital effects. It is configured with 2 mono and 2 stereo input
channels, each channel is equipped with a variety of key features including a warm, natural sounding EQ, Peak LED
and PAN/BAL control etc..

We would like to thank all the people who made the LTO L-6 6-Channel Mixing Console with Digital Effects possible,
especially to our designers and LTO staff. It is their passion for music and professional audio that has made it possible
for us to offer you, our most important team member, our continued support.

Thank you very much

LTO AUDIO TEAM

2

TABLE OF CONTENTS

1. INTRODUCTION..................................................................................................................................4

2. FEATURES...........................................................................................................................................4

3. READY TO START?.............................................................................................................................4

4. CONTROL ELEMENTS.......................................................................................................................5

4.1 The MIC/LINE channels

4.2 INPUT LEVEL setting

4.3 STEREO INPUT (CH3 ~ CH6)

4.4 The 3 BANDS EQUALISER

4.5 AUX

4.6 PAN

4.7 PEAK

4.8 LEVEL

4.9 MASTER section

4.10 REAR PANEL

5. INSTALLATION AND CONNECTION..................................................................................................11

6. FOR THE EXPERTS WHO WANT TO KNOW MORE..........................................................................13

7. PRESET LIST ....................................................................................................................................14

8. SYSTEM BLOCK DIAGRAMS...........................................................................................................21

9. TECHNICAL SPECIFICATION.............................................................................................................22

10. WARRANTY........................................................................................................................................24

3

1. INTRODUCTION

Thank you very much for expressing your confidence in products by purchasing L-6 6-Channel MixingLTO LTO
Console with Digital Effects. The L-6 is the smallest among our range of mixing consoles with digital effects. 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-6 6-Channel Mixing Console with Digital Effects is packed with features that can not be found in other consoles
of its size: 2 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

mix, control room / headphone outputs.

Your L-6 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-6.

; built-in effects processor; highly accurate 6-segment bar graph meters and 2-Track inputs assignable to main

2. FEATURES

The L-6 6-Channel Mixing Console with Digital Effects is designed for professional appliance. It will provide the follow­ing features:

2 MIC input channels with gold plated XLR 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

Built-in digital effects processor

Peak LED on each channel

AUX send per channel for external effects and monitoring

Main output, Control room and headphone outputs are unbalanced type

2-Track inputs assignable to main mix, control room / headphone outputs

Highly accurate 6-segment bar graph meters

3. READY TO START?

3.1 There is a small black box provided with your L-6. This is the specific AC input Adapter. Connect the proper terminal
into your L-6 and the Adapter into an AC socket.

3.2 Be sure that the main power switch is turned off before connecting the AC Adapter. 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-6 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 AC Adapter always turn-off your L-6.

3.5 Do not use solvents to clean your L-6. A dry and clean cloth will be OK.

4

4. CONTROL ELEMENTS

MIC 1

12

3

BAL OR

UNBAL

LINE IN 1

TRIM

+15dB -45dB LINE

0dB 60dB MIC

0

EQ

12kHz

+15+15-15-15

0

MID

2.5kHz

+12-12

0

HI

MIC 2

12

3

BAL OR

UNBAL

LINE IN 2

TRIM

+15dB -45dB LINE

0dB 60dB MIC

0

EQ

12kHz

+15+15-15-15

0

MID

2.5kHz

+12-12

0

STEREO AUX RETURNS

LEFT

LINE IN 3/4

LEFT (MONO)

RIGHT

0

HI

0

0

AUX SENDS

PHONES

LINE IN 5/6

CONTROL ROOM OUTPUT

LEFT

RIGHTRIGHT

MAIN MIX OUTPUT

R

LTO

L-6

6-CHANNEL MIXING CONSOLE

WITH DIGITAL EFFECTS

2-TRACK IN/OUT

L

LEFT (MONO)

RIGHT

EQ

HI

12kHz

+15+15-15-15

MID

2.5kHz

+12-12

0

+15+15-15-15

0

+12-12

0

EQ

HI

12kHz

MID

2.5kHz

LEFT

RIGHT

14

13

12

16

15

11

10

PRESETS

1

9

R

TAPE IN

2

3

4

6

7

8

5

TAPE OUT

1 VIBRAFLANGE
2 FUNKY
3 ROCKABILLY
4 BIGSTAGE
5

VIBRATO

8
9

FLANGER

12
13

CHORUS

16

LOW

80Hz

+15+15-15-15

0

AUX

D
F
X

8

-+15

POST
(PRE)

D
F
X

8

-+15

PAN

LEFT

RIGHT

PEAK

8

-+15

-+158-+158-+158-+15

LEVEL

1

LEFT

LEVEL

2

0

+15+15-15-15

RIGHT

LOW

80Hz

AUX

POST
(PRE)

PAN

PEAK

+15+15-15-15

0

D
F
X

8

-+15

LEFT

RIGHT

LEVEL

3/4

LOW

80Hz

AUX

POST
(PRE)

BAL

PEAK

+15+15-15-15

0

D
F
X

8

-+15

LEFT

RIGHT

8

LEVEL

5/6

LOW

80Hz

AUX

POST
(PRE)

BAL

PEAK

0

10

FX LEVEL REVERB LEVEL

0

MAX

CONTROL
ROOM

PHANTOM PWR

2TK TO MIX

8

-+15

AUX RETURNS

(DFX)

2TK TO

CTRL ROOM

8

-

PHONES /

PEAK

100

POWERPHANTOMPHANTOM

CLIP

10

0

-4

-10

-30

L

OUTPUT LEVEL

R

0

8

-+15

MAIN MIX LEVEL

5