Alto S-6 Users Manual

User's Manual

S6

6 CHANNEL MIXING CONSOLE

R

LTO

www.altoproaudio.com

Version 2.3 August 2005

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.

Fuse

To prevent fire and damage to the product, use only
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.

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.

Disposing of this product should not be
placed in municipal waste and should be
Separate collection.

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.

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.

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 S-6 6-Channel Mixing Console, which is the result of our LTO AUDIO TEAM's
endeavours.

For the LTO AUDIO TEAM, music and audio is 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 S-6 is an extremely flexible, ultra-low noise 6-channel console, which is the smallest among our range of
mixing consoles. 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 LEDs and PAN/BAL control etc..

We would like to thank all the people who made the LTO S-6 6-Channel Mixing Console 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. SYSTEM BLOCK DIAGRAMS...........................................................................................................14

8. TECHNICAL SPECIFICATION.............................................................................................................15

9. WARRANTY..........................................................................................................................................16

3

1. INTRODUCTION

Your S-6 is a 6-channel mixer and it is the smallest among our range of mixing consoles. Although, great performances
and sound quality is insured thanks to the specification of the components used and the building quality.

Your S-6 is packed with features in proportion with it size: 2 Mono (these are provided with Ultra Low Noise microphone
preamplifiers and Phantom Power at +48 Volts) and 2 stereo input channels are provided, and each of them is provided
with a 3 bands graphic equaliser for LOW, MID and HI controls, as well as 1 Auxiliary Bus. There is even a stereo
input available to be assigned directly to the main MIX or to the other outputs: Control Room and Headphone.

Your S-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 S-6.

2. FEATURES

Your S-6 Console Mixer is your ideal companion for use with keyboards, MIDI Equipment, small PA and Audio/Video
applications. The 2 track input assignable directly to the main MIX or the Control Room Output makes your S-6 also
suitable for recording an playback audio signals.

- 2 Input for Microphone provided with balanced 1/4" jack and XLR

- The Microphone preamplifiers are Ultra Low Noise and are provided with +48 Volts Phantom Power

- 2 Stereo input for Line level signal provided with balanced TRS 1/4" jacks

- Precise 3 bands graphic equaliser (LOW, MID and HI) on each input channel

- 1 Auxiliary send on all input channel to connect an external stage monitor loudspeaker or a sound processor

- Single Led indicating signal Peaks on each input channel

- 6 Segments Led Meter for optimum reading of the output signal

- Main Output and Control Room outputs are unbalanced type

- 2-track input featuring RCA sockets assignable alternatively to each output group

3. READY TO START?

3.1 There is a small black box provided with your S-6. This is the 18V AC Adapter. Connect the proper terminal into your
S-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 S-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 S-6.

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

4

4. CONTROL ELEMENTS

MIC 1

12

3

B R

BAL OR

N

UNBAL

LINE IN 1

TRIM

+15dB -45dB LINE

0dB 60dB MIC

EQ

-15 +15

0

LINE IN 2

+15dB -45dB LINE

0dB 60dB MIC

zHI12kHz

-15 +15

MIC 2

TRIM

0

STEREO

AUX RETURN

12

3

BA OR

BAL OR

N

UNBAL

LEFT(MONO)

RIGHT RIGHT

LINE IN 3/4

AUX SENDS

PHONES

LINE IN 5/6

CONTROL ROOM

OUTPUT

LEFT

MAIN MIX OUTPUT

R

LTO

S-6

6-CHANNEL MIXING CONSOLE

2-TRACK IN/OUT

L

EFT O O)LEFT(MONO)

LEFT (MONO)

LEFT

R

EQ

HI

12kHz

RIGHT RIGHT

EQ

HI

12kHz

-15 +15

0

-15 +15

0

EQ

zHI12kHz

RIGHT

TAPE IN TAPE OUT

MID

2.5kHz

-12 +12

LOW

H

80Hz

-15 +15

AUX

P STPOST

(PRE)

8

-+15

PAN

RIGHTLEFT

PEAK

8

-+15

-12 +12

-15 +15

8

-+15

8

-+15

MID

2.5kHz

-12 +12

LOW

z

80Hz

-15 +15

AUX

PO TPOST

(PRE)

8

-+15

PAN

RIGHTLEFT

PEAK PEAK PEAK

8

-+15

MID

2.5kHz

-12 +12

LOW
80Hz

-15 +15

AUX

P TPOST

(PRE)

-+15

BAL

RIGHTLEFT

-+15

LEVEL LEVEL LEVEL LEVEL

1

2

3/4

5/6

MID

2.5kHz

OLOW

80Hz

AUX

P STPOST

(PRE)

8

BAL

RIGHTLEFT

8

PHANTOM PWR

8

-+15

AUX RETURN

2TK TO2TK TO

CONTROL

ROOM

2TK TO MIX

8

MAX

-

CONTROL

PHONES /

ROOM

PHANTOM PWR

CLIP

10

0

-4

-10

-30

L R

OUTPUT LEVEL

8

-+15

MAIN MIX

LEVEL

5