Alto S-8 Users Manual

S-8

8-CHANNEL MIXING CONSOLE

User's Manual

1

2

LINE IN 1

LEVEL

1

MIC 1

12

3

TRIM

EQ

AUX

PAN

MIC 2 MIC 3 MIC 4

12

12

3

3

LNE IN 3

LINE IN 2

TRM

TRIM

EQ

EQ

1

1

AUX

AUX

2

2

PAN

PAN

LEVEL

LEVEL

3

2

STEREO AUX RETURN AUX SEND

LEFT(MONO)

12

3

LINE N 4

1

2

LEVEL

4 5/6 7/8

12

3

TRIM

TRIM

EQ

EQ

1

AUX

AUX

2

BAL

PAN

LEVEL

RGHT

LNE N 5/6 LNE N 7 8

1

2

LEVEL

EQ

AUX

BAL

2-TRACK IN/OUT

L

R

TAPE IN TAPE OUT

2

MA N MIX

LEVEL

S-8

LTO

8-CHANNEL MIXING CONSOLE

1

AUX

RETURN

www.altoproaudio.com

Version 1.2.Aug.2008

English

IMPORTANT SAFETY INSTRUCTION

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK
PLEASE DO NOT REMOVE THE COVER OR
THE BACK PANEL OF THIS EQUIPMENT.
THERE ARE NO PARTS NEEDED BY USER
INSIDE THE EQUIPMENT. FOR SERVICE,
PLEASE CONTACT QUALIFIED SERVICE
CENTERS.

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.

CAUTION

Describes precautions that should be observed to
prevent damage to the product.

1.

Read this Manual carefully before operation.
Keep this Manual in a safe place.

2.

Be aware of all warnings reported

3.

with this symbol.

4.

Keep this Equipment away from water and
moisture.

5.

Clean it only with dry cloth. Do not use
solvent or other chemicals.

6.

Do not damp or cover any cooling opening.
Install the equipment only in accordance with
the Manufacturer's instructions.

Power Cords are designed for your safety. Do

7.

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.

Unplug this equipment when unused for long

8.

periods of time or during a storm.

Refer all service to qualified service personnel

9.

only. Do not perform any servicing other than
those instructions contained within the
User's Manual.

To prevent fire and damage to the product,

10.

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.

WARNING

To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.

Dispose of this product should
not be placed in municipal waste
and should be separate collection.

Move this Equipment only with a cart,

11.

stand, tripod, or bracket,
specified by the
manufacturer, or
sold with the
Equipment. When
a cart is used, use
caution when
moving the cart /
equipment
combination to
avoid possible
injury from tip over.

12.

Permanent hearing loss may be caused by
exposure to \ extremely high noise levels.
The US. Government's Occupational Safety
and Health Administration (OSHA) has
specified the permissible exposure to noise
level.
These are shown in the following chart:

HOURS X DAY

8
6
4
3
2
1,5
1
0,5
0,25 or less

According to OSHA, an exposure to high SPL in
excess of these limits may result in the loss of
heat. To avoid the potential damage of heat, it is
recommended that Personnel exposed to
equipment capable of generating high SPL use
hearing protection while such equipment is
under operation.

The apparatus shall be connected to a mains
socket outlet with a protective earthing
connection.

The mains plug or an appliance coupler is used
as the disconnect device, the disconnect device
shall remain readily operable.

EXAMPLE

SPL

Small gig

90

train

92

Subway train

95

High level desktop monitors

97

Classic music concert

100
102
105
110
115

Rock concert

IN THIS MANUAL:

1. INTRODUCTION.......................................................................1

2. FEATURES..............................................................................2

3. READY TO START?....................................................................2

4. CONTROL ELEMENTS.................................................................3

5. INSTALLATION AND CONNECTION..........................................12

6. FOR THE EXPERTS WHO WANT TO KNOW MORE......................14

7.BLOCK DIAGRAM..................................................................15

8.TECHNICAL SPECIFICATION....................................................16

9.WARRANTY...........................................................................17

1. INTRODUCTION

Thank you for choosing the ▲LTO S-8 8-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-8 is an extremely flexible, ultra-low noise 8-channel console,

configured with 4 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-8 8-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.

1

2. FEATURES

▲

5 Input for Microphone and line provided with balanced 1/4" jack and XLR.
Channel 5 features stereo Line input

▲

1 additional input for Line level signal provided with balanced TRS 1/4" jacks

▲

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

▲

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

▲

Pre-fader and post-fader Auxiliary bus

▲

Single Led indicating signal Peaks on each input channel

▲

Low-cut filter on all mono MIC channels

▲

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

▲

12 Segments Led Meter for optimum reading of the output signal

▲

Main Output and Control Room outputs are unbalanced type

S

P

TL

IGO

HT

3. READY TO START?

3.1 Please check the AC Voltage available in your Country before connecting
your S-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 S-8 you shall connect it to a power amplifier and
urn-on the mixer BEFORE the power ampifier. Once you have finished your
working session you shall turn the mixer off AFTER the power amplifier.

3.4 Before disconnecting the S-8 always turn-off the Power switch.

3.5 Do not use solvents to clean your S-8. A dry and clean cloth will be OK.

2

FRONT PANEL

4. CONTROL ELEMENTS

LINE IN 1

1

2

TRIM

MIC 1

L

R

EQ

AUX

BAL

2 TRACK IN/OUT

TAPE IN TAPE OUT

2

RETURN

S-8

LTO

8 CHANNEL MIXING CONSOLE

1

AUX

STEREO AUX RETURN AUX SEND

LEFT(MONO)

MIC 2 MIC 3 MIC 4

12

3

EQ

AUX

PAN

LINE IN 2

TRIM

1

2

12

3

EQ

AUX

PAN

LINE IN 3

TRIM

1

2

12

3

EQ

AUX

LINE IN 4

TRIM

1

12

3

EQ

AUX

2

PAN

PAN

R GHT

LINE N 5/6 LINE IN 7/8

12

3

TRIM

EQ

AUX

1

2

1

2

BAL

LEVEL

1

LEVEL

2

LEVEL

3

LEVEL

LEVEL

4 5/6 7/8

LEVEL

MAIN MIX

LEVEL

3

4. CONTROL ELEMENTS

1 The Mono MIC/LINE Channels

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.

M MIC 1

12

3

2 Input Level Setting

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.

3 Low-cut Filter

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 48 Volt Phantom Power

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.

ON

OFF

I

LINE IN 1

I

TRIM

+15dB -45dB LINE

0dB 60dB MIC

POWER

ALBAL OR

UNBAL

LOW CUT

75Hz

18dB/Oct

PHANTOM

1

2

3

4

4