Alto L-16 Users Manual

User's Manual

16-CHANNEL COMPACT INTEGRATED

L-16

LIVE SOUND MIXER WITH DIGITAL EFFECTS

R

LTO

www.altoproaudio.com

Version 1.5 September 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 L-16 16-Channel Compact Integrated Live Sound Mixer 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-16 is an extremely flexible, ultra-low noise 16-channel compact integrated live sound mixer with Digital Effects, configured with 8 mono and 4 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.. Besides, the L-16 is equipped with the miraculous 24 bit digital stereo effect processor with 256 presets. Seeing is believing, let's meet the LTO L-16.

We would like to thank all the people who made the LTO L-16 16-Channel Compact Integrated Live Sound Mixer 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...........................................................................................................................................................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 MONO Channel INSERT..............................................................................................................................8

4.4 LOW-CUT FILTER......................................................................................................................................8

4.5 STEREO INPUTS........................................................................................................................................9

4.6 EQUALISER.................................................................................................................................................9

4.7 AUX SENDS Level Control........................................................................................................................10

4.8 PAN/BAL Control........................................................................................................................................10

4.9 SG/PEAK LED............................................................................................................................................10

4.10 MUTE Switch..............................................................................................................................................10

4.11 FADER ......................................................................................................................................................11

4.12 ASSIGNMENT Control......................................................................................................... .....................11

4.13 MASTER Section .......................................................................................................................................11

4.14 REAR PANEL Description ..........................................................................................................................15

5. INSTALLATION AND CONNECTION.....................................................................................................................19

6. PRESET LIST........................................................................................................................................................22

7. SYSTEM BLOCK DIAGRAMS.............................................................................................................................23

8. TECHNICAL SPECIFICATION..............................................................................................................................24

9. WARRANTY..........................................................................................................................................................26

3

1. INTRODUCTION

Thank you very much for expressing your confidence in products by purchasing L-16 16 Channel CompactLTO LTO Integrated Mixer with Digital Effects. The L-16 is a professional compact mixer. You will get the smooth, accurate more natural and open sound from this apparatus, it is really ideal for large gigs, recording and fixed PA installations.

The L-16 16 Channel Compact Integrated Mixer with Digital Effects is packed with features that can not be found in other consoles of its size: 10 mono (these are provided with Ultra Low Noise microphone pre-amplifiers and Phantom Power at +48 Volt) and 4 stereo input channels, and each of them is provided with warm, natural EQ (channel1-8 are mono channels and equipped with 3 band MID sweep EQ; channel 9-16 are stereo channels and equipped with 4 band fixed frequency EQ); (16 presets 16 variations); 4-AUX sends; se-24 bits digital stereo effect processor with 256 presets parate level control on each channel; highly accurate 12-segment bar graph meters; 2-Track inputs assignable to main mix, control room / headphone outputs and subgroups output.

Your L-16 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-16.

4

2. FEATURES

The L-16 16 Channel Compact Integrated Mixer with Digital Effects is designed for professional appliance. It will provide the following features:

10 MIC input channels with gold plated XLRs and balanced LINE inputs

4 Stereo input channels with balanced TRS jacks

Ultra-low noise discrete Mic Preamps with +48V Phantom Power

Extremely high headroom offering more dynamic range

60mm high precision faders

Each input channel with Mute, SOLO function, Overload & signal present LEDs and low cut filters (except for stereo

channel)

SUB 1-2, SUB 3-4 and MAIN L-R signal assignment switch

4 AUX sends per channel: 2 PRE/POST faders switch-able for monitoring application and effects & sound processor

input; 2 POST faders for internal digital DFX or as external send

4-band fixed EQ on stereo line channels

3-band EQ with swept mid on microphone channels

Channel inserts and direct outputs on each mono channel plus main mix insert for flexible connection of outboard

equipment

24-bit DSP effect

256 effects (16 presets 16 variations)

Stereo 9-band graphic EQ

BNC socket for connecting lamp

Control room/phones matrix

2-TRACK IN assignable to main mix, control room/headphone outputs

Highly accurate 12 segment output level meters

5

3. READY TO START?

3.1 Please check the AC Voltage available in your Country before connecting your L-16 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-16 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-16 always turn-off the Power switch.

3.5 Do not use solvents to clean your L-16. A dry and clean cloth will be OK.

6

4. CONTROL ELEMENTS

L-16

2-TRACK IN/OUT

MIC 10

MIC 9

MIC 8

MIC 7

MIC 6

MIC 5

MIC 4

MIC 3

MIC 2

MIC 1

R

DIGITAL EFFECTS

LTO

WITH

16 CHANNEL COMPACT INTEGRATEDLIVE SOUND MIXER

LAMP

12V 0.5A

L

R

12

3

12

3

12

3

12

3

12

3

12

3

12

3

12

3

12

3

12

3

TAPE OUT

TAPE IN

DIGITAL STEREOEFFECTS PROCESSOR

24BITs

PHONES

LINE IN 15

LINE IN 13

LINE IN 11

LINE IN 9

LINE IN 8

LINE IN 7

LINE IN 6

LINE IN 5

INEIN4 L

LINE IN 3

LINE IN 2

LINE IN 1

9. SPRING REVERB

10. MONO DELAY

11. STEREO DELAY

12. FLANGER

13. CHORUS

14. REVERB + DELAY

15. REVERB + FLANGER

16. REVERB + CHORUS

1. VOCAL 1

2. VOCAL 2

3. LARGE HALL

4. SMALL HALL

5. LARGE ROOM

6. SMALL ROOM

7. PLATE

8. TAPEREVERB

B

A

LEFT

RIGHT

(MONO)

LINE IN 16

LEFT

RIGHT

(MONO)

LINE IN 14

LEFT

RIGHT

(MONO)

BAL UNBAL

LINE IN 12

LEFT

RIGHT

(MONO)

BAL UNBAL

LINE IN 10

BAL UNBAL

INSERT

BAL UNBAL

INSERT

BAL UNBAL

INSERT

BAL/UNBAL

INSERT

BAL/UNBAL

NSERT

BAL/UNBAL

INSERT

BAL/UNBAL

INSERT

BAL/UNBAL

INSERT

4

3

2

1

16

15

14

4

3

2

1

16

15

14

0

LINE

GAIN

0

LINE

GAIN

0

MIC

GAIN

MIC

GAIN

TRIM

PWR

5

6

7

8 9

10

VARIATONS

11

12

13

5

6

7

8 9

10

PRESETS

11

12

13

0

AUX1

-+158-+15

8

-+15

EFFECTS OUT

15/16

+2020

13/14

+2020

MIC

10

60dB

75Hz

LOW CUT

0dB

MIC

9

60dB

75Hz

LOW CUT

0dB

MIC

LINE

8

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

7

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

6

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

5

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

4

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

3

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

2

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

MIC

LINE

1

60dB

-45dB

75Hz

LOW CUT

0dB

+15dB

18dB/Oct

18dB Oct

PHANTOM

PEAK

DSP MUTE

DFX2(INT) RETURNS

EFFECTS TO MONITOR

0

-5

+5

-10

+15

+10

16K

8K4K

2K

1K

500250125

AUX2

8

63

+15

+10

HI

EQ

12kHz

HI-MID

+15+15

0

-15-15

HI

EQ

12kHz

HI-MID

+15+15

0

-15-15

HI

EQ

12kHz

HI-MID

+15+15

0

-15-15

HI

EQ

12kHz

HI-MID

+15+15

0

-15-15

HI

M D

EQ

12kHz

+15+15

0

-15-15

HI

M D

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

HI

MID

EQ

12kHz

+15+15

0

-15-15

-15

0

-5

+5

-10

-15

EQ OFF

EQ ON

3kHz

500Hz

M D LOW

+15-15

0

3kHz

500Hz

M D LOW

+15-15

0

3kHz

500Hz

M D-LOW

+15-15

0

3kHz

500Hz

M D-LOW

+15-15

0

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

FREQ

+15

8kHz

0

800

-15 100Hz

MAX

7

4

2

0

-2

SUB 3-4

SEND2

10

8

CLIP

-

CTRL ROOM

2TK N

2TK TO MIX

8

MAIN M X

0

8

3

SOLO

0

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

POST

PRE

DFX1

(EXT)

0

8

-+15

3

8

PHONES

-

SUB 1-2

MAIN M X

CTRL ROOM SOURCE

SEND1

TO AUX

0

-+158-+15

2

1

STEREO GRAPHIC EQ

0

-+158-+15

2

1

STEREO AUX RETURNS

SOLO

0

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

2

1

AUX SENDS

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

80Hz

LOW

AUX

+15+15-15-15

0

8

-+15

2

1

SOLO

LEVEL SET

MAIN MIX

AUX RETURNS

CTRL/R

SUB 3 4

SUB 1 2

0

8

-+158-+15

4

4-DFX2 RETURN

SOLO

0

8

4 - DFX2 SEND

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

(INT)

DFX2

0

8

-+158-+15

4

-4

BAL

PAN

LEVEL

-7

-30

-10

SOLOACTIVE

-20

L R

OUTPUT

AFL

PFL

SOLO MODE

LEFT

RIGHT

LEFT

RIGHT

LEFT

RIGHT

SUBGROUPS ASSGN TOMAINMX

LEFT

R GHT

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG/PEAK

RIGHTLEFT

SG PEAK

0

5

-5

10

dB

0

5

10

dB

0

5

10

dB

0

5

10

dB

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

MUTE

SUB 1-2

0

5

10

dB

-25-25

-10

-20

-30

-40

-60

-5

-25

-10-10

-20-20

-30

-40

-60-60

-5

-10

-5

-10

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

SUB 3-4

-5

-10

40

20

30

60

-25

-20

-30

-40

-60

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

MAIN L-R

-25

-20

-30

-40

-60

LEVEL

MAIN MIX

SUB4

SUB3

SUBGROUPS

SUB2

SUB1

SOLO

15/16

SOLO

13/14

SOLO

11/12

SOLO

9/10

SOLO

8

SOLO

7

SOLO

6

SOLO

5

SOLO

4

SOLO

3

SOLO

2

SOLO

1

7

4. CONTROL ELEMENTS

4.1 The MONO MIC/LINE Channels

1

These are Channel 1 through Channel 8. 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 occasionally in order to avoid distortion on the input channel.

MIC 1

LINE IN 1

INSERT

60dB

0dB

-45dB

+15dB

LOW CUT

75Hz

18dB/Oct

12

3

BAL/UNBAL

TRIM

1

MIC

LINE

1

3

2

5

4.3 MONO Channel INSERT

Insert points are provided for the Mono Mic Channels. When you insert a TRS jack in the insert socket, the signal will be taken out

3

POWER

ON

PHANTOM

after the Input Gain Control (Trim), sent to an external processor such as a compressor-limiter, and returned into the channel strip immediately before the EQ section. Of course, the jacks used must

OFF

be stereo (Tip Send/Ring Return).

4.4 LOW-CUT FILTER

5

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