Nilfisk S-6 User Manual

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User's Manual

6 CHANNEL MIXING CONSOLE

LTO

www.altoproaudio.com

Version 2.0 Dec. 2002

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.

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

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

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. CONTROL ELEMENTS

MIC 1

BAL OR

UNBAL

LINE IN 1

TRIM

+15dB -45dB LINE

0dB 60dB MIC

12kHzHI12kHz

-15 +15

MIC 2

BAL OR

UNBAL

LINE IN 2

TRIM

+15dB -45dB LINE

0dB 60dB MIC

12kHzHI12kHz

-15 +15

STEREO

AUX SENDS

CONTROL ROOM

AUX RETURN

LEFT(MONO)

RIGHT RIGHT

LINE IN 3/4

LEFT(MONO)

RIGHT RIGHT

12kHzHI12kHz

-15 +15

PHONES

LINE IN 5/6

LEFT (MONO)

-15 +15

MAIN MIX OUTPUT

12kHzHI12kHz

OUTPUT

LEFT

RIGHT

LTO

S-6

6-CHANNEL MIXING CONSOLE

2-TRACK IN/OUT

TAPE IN TAPE OUT

MID

2.5kHz

-12 +12

-15 +15

LOW

80Hz

-12 +12

-15 +15

AUX

POST

(PRE)

-+158-+15

PAN

RIGHTLEFT

PEAK

-+15

MID

2.5kHz

-12 +12

LOW

80Hz

-15 +15

AUX

POST

(PRE)

-+15

PAN

RIGHTLEFT

PEAK PEAK PEAK

-+15

MID

2.5kHz

-12 +12

LOW

80Hz

-15 +15

AUX

POST

(PRE)

-+15

BAL

RIGHTLEFT

-+15

LEVEL LEVEL LEVEL LEVEL

3/4

5/6

MID

2.5kHz

LOW

80Hz

AUX

POST

(PRE)

BAL

RIGHTLEFT

PHANTOM PWR

-+15

AUX RETURN

2TK TO

CONTROL ROOM

2TK TO MIX

MAX

CONTROL

PHONES /PHONES /

ROOM

PHANTOM PWR

CLIP

-4

-10

-30

L R

OUTPUT LEVEL

-+15

MAIN MIX

LEVEL

4.1 The MIC/LINE channels

These are Channel 1 and Channel 2. 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.

4.1.1 PHANTOM POWER +48 Volts

MIC 1

It is available only on the XLR input sockets.

4.2 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.

BAL OR

UNBAL

LINE IN 1

TRIM

+15dB+15dB -45dB-45dB LINE

0dB

0dB 60dB MIC

4.3 STEREO INPUT (CH3~CH6)

Each stereo channel comes with two balanced line level inputs on 1/4" TRS jacks, for left and right signals. When only the left input is connected, the channel operates in mono.

LINE IN 3/4

LEFT(MONO)

RIGHT RIGHT

LINE IN 5/6

LEFT (MONO)

4.3 The 3 BANDS EQUALISER

A 3-band equaliser is provided for all input channels with a wide range of frequency adjustment.

4.4.1 HI

This is the treble control. You can use it to get rid of high frequency noises or to boost the sound of cymbals or the high harmonics of the human voice. The gain range goes from -15dB to +15dB with a center frequency of 12 kHz.

4.4.2 MID

This is the midrange control. It can affect most fundamental frequ

-encies of all musical instruments and human voice. An attentive use of this control will give you and very wide panorama of sound effects. The gain range goes from -12dB to +12dB and the center frequency is 2.5 kHz.

-15 +15

-12 +12

-15 +15

12kHz

MID

2.5kHz

LOW

80Hz

4.4.3 LOW

This is the Bass control. Boost male voice or kickdrum and bass guitar. Your system will sound much bigger than what it is. The gain range goes from -15dB to +15dB and the center frequency is 80 Hz.

4.5 AUX

This control will send the audio signal to the Auxiliary Bus. The configuration is post-fader so the level sent to the AUX bus will be affected by the Main Level Control of that particular channel. Note: There is the possibility to configure this AUX Send as Pre-fader as we will explain later in this Manual.

4.6 PAN

This is the PANORAMA control, or balance control. You can adjust the stereo image of the signal via this Control. Keep this control in center position and your signal will be positioned in the middle of stage. Turn this control fully counterclockwise and the signal will be present only on the left speaker and vice-versa. Of course a wide number of intermediate positions is available.

AUX

POST

(PRE)

-+15

PAN

RIGHTLEFT

PEAK

4.7 PEAK

Inside your S-6 the audio signal is monitored in several different stages and then sent to the PEAK Led. When this Led blinks, it warns you that you are reaching signal saturation and possible distortion. The PEAK Led will blink with a level that is 6dB before actual clipping.

4.8 LEVEL

This Control will adjust the overall level of this channel and set the amount of signal sent to the Main output.

-+15

LEVEL

4.9 MASTER section

- MAIN MIX LEVEL

This Control sets the amount of signal sent either to the Main Out socket or to the Tape Output.

- PHONES/CONTROL ROOM

This Control sets the amount of signal sent to the Control Room and headphone.

- LED METER

This stereo 6 segments Led Meter will indicate the level of the overall output signal.

- 2 TRACK signal path

If you push down the 2TK TO CONTROL ROOM button, the 2 TRACK IN signal will be routed into the Control Room output and the level will be adjusted by the Control Room knob nearby the Main MIX LEVEL knob.

If you push down the 2TR TO MIX button, the 2 TRACK IN signal will be routed into the MAIN output and will be adjusted by the MAIN MIX LEVEL knob.

PHANTOM PWR

-+15

AUX RETURN

2TK TO

CONTROL ROOM

2TK TO MIX

PHANTOM PWRPHANTOM PWR

CLIP

-4

-10

-30

L R

OUTPUT LEVEL

- AUX RETURN

It will be used to return the signal of an effect processor into the mixer but it can be also used as an additional stereo line input. This signal of the AUX RETURN is always assigned to the MAIN MIX. The Aux Return input will operate in mono if you connect an input only to the left socket.

- PHANTOM PWR

This switch will apply +48 Volt Phantom Power only to the 2 XLR microphone inputs. Never con

-nect microphones when the Phantom Power is on already.

- PHANTOM

This LED indicates when the Phantom Power is switched on.

- PWR

PHONES /PHONES /

MAX

CONTROL

ROOM

-+15

MAIN MIX

LEVEL

1112

This Led indicates when the Power is on in your S-6.

- MAIN MIX OUTPUT

This stereo output is controlled by the Main Mix Level on the front panel and will send the audio signal to an amplifier. The output level can be varied from - to +15dB.

MAIN MIX OUTPUT

2-TRACK IN/OUT

- 2-TRACK IN/OUT

Input

Use the Tape input if you wish to listen to your Mix from a Taper Recorder or DAT, You can the signal coming form the Taper Recorder either to a pair of studio monitor using the Control Room assignment on the front panel or you can also send the signal directly to the Main Mix.

Output

These 1/4" TRS sockets will route the main mix into a tape recorder.

STEREO

AUX RETURN

LEFT(MONO)

AUX SENDS

PHONES

CONTROL ROOM

OUTPUT

LEFT

RIGHT

TAPE IN TAPE OUT

LTO

6-CHANNEL MIXING CONSOLE

S-6

RIGHT RIGHT

- STEREO AUX RETURN

Use these stereo 1/4" phone socket to return the sound of an effect unit or sound processor to the Main Mix. Alternatively you can use them as an extra auxiliary input.

- AUX SENDS

This 1/4" phone socket is used to send out the signal from the AUX Bus to external devices such as effects and sound processors.

- PHONES

This socket will send out the signal mix to a pair of headphones.

- CONTROL ROOM OUTPUT

These 1/4" phone sockets will be used to send the signal to Studio Monitor speakers or to a second set of PA.

4.10 REAR PANEL

WARNING: SHOCK HAZARD AVIS: RISQUE DE CHOC ELECTRIQUE

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

- DO NOT OPEN

- NE PAS OUVRIR

OFF

POWER

18VAC~

RATED POWER CONSUMPTION: 11W

25 26

- POWER

This switch is used to turn the Main Power ON and OFF.

- 18VAC

Used to connect the supplied AC Adapter.

MODEL

SERIAL

5. INSTALLATION AND CONNECTION

Ok, you have got to this point you are now in the position to successfully operate your S-6. However, we advise you to read carefully the following section to be the real Master of your own Mix. Not paying attention enough to the Input signal level, to the routing of the signal and the assignment of the signal will result in unwanted distortion, a corrupted signal or no sound at all. So you should follow this procedure for every single channel:

- Turn down all Input and Output Gain Controls

- Connect phantom powered microphones before switching on the +48Volt Phantom Power switch

- If you have a power amplifier connected to your S-6 set the Level of the amplifier at no more than 70%

- Now, set the CONTROL ROOM/PHONE level at no more than 50%. IN this way you will be able to hear later what you are doing connecting a pair of headphones or a pair of powered studio monitor speakers.

- Position HI, MID and LOW eq controls on middle position

- Position panoramic (PAN) control on center position.

- With a headphone or studio monitor speakers connected apply a Line Level input signal so that the PEAK Led does not light up.

- At this point increase the input gain so that the PEAK led will blink occasionally. IN this way you will maintain good headroom and ideal dynamic range.

- Now connect a microphone and ask the singer to sing loud into the microphone. Turn slowly the Gain Control clockwise and have the PEAK Led blink only occasionally

- Now repeat the same sequence for all input channels. The Main Led Meter could move up into the red section. In this case you can adjust the overall output level through the MAIN MIX control.

b. Some Final Tips on Wiring Configuration

You can connect unbalanced equipment to balanced inputs and outputs. Simply follow these schematics.

Strain Clamp

Sleeve

Tip

Ring

Sleeve=Ground/Screen

Use for Headphone, Stereo Return

Ring=Right Signal

1/4" Stereo (TRS) Jack Plug

Sleeve

Use for Mono Line In, Mono 1/4"Jack Plugs

Tip

Sleeve=Ground/Screen

1/4" Mono (TS) Jack Plug

Tip=Left Signal

Tip=Signal

2=Hot(+)

Use for Balanced Mic Inputs

(For unbalanced use, connect pin 1 to 3)

3=Cold(-)

1=Ground/Screen

3-pin XLR Male Plug

(seen from soldering side)

2=Hot(+)

Use for Main output

(For unbalanced use, leave pin 3 unconnected)

3=Cold(-)

1=Ground/Screen

3-pin XLR Line Socket

(seen from soldering side)

6. FOR THE EXPERTS WHO WANT TO KNOW MORE

As we have told you previously in this Manual, the Aux Send Control both on Mono and stereo channels is factory wired as POST-FADER. If you have some skill in electronic components soldering you can modify this setting and have all your AUX sends configured as PRE-FADER.

(PRE)

POST

Aux

(PRE)

Disconnect the POST route

POST

Before

Modification on mono and stereo channels

Aux

Solder the PRE route

After

7. SYSTEM BLOCK DIAGRAMS

AUX SEND

MAIN OUT

213

LEFT

MAIN MIX LEFT

MAIN MIX RIGHT

213

TAPE OUT

2-TRACK

TAPE IN

LEVEL

MAIN MIX

2TK TOMIX

2TKTOCTRLROOM

RIGHT

PHONES

LEFT

PHON ESOUTPUT

CONTROL ROOM OUTPUT

ROOM

& PHONES

CONTROL

RIGHT

LEFT METER

Titel

ALTO MIXINGCONSOLE

RIGHTMETER

Revision

Model No:

Size

VER020820

S-6 BLOCK DIAGRAM

1o f

Sheet

4-Oct-2002

Date:

KEVIN LI N.

DrawnBy:

S6-MAP.Sch

File:

RIGHT -BUS

LEFT- BUS

RIGHT -BUS

AUX

POST

PRE

LEFT- BUS

RIGHT -BUS

AUX R ETURN

SG/OL

12K2.5K80

AUX RIGHT-BUS LEFT-BUS

AUX

LEFT- BUS

PAN

LEVEL

RIGHT -BUS

AUX

POST

PRE

LEFT- BUS

AUX -1

RIGHT -BUS

LEFT- BUS

BALANCE

LEVEL

MID

GAIN

12K2.5K80

+/-15db

3-BANDEQ

SG/OL

MID

12K2.5K80

+/-15dB

3-BANDEQ

LS ( 1-2 )

PUT CHANNE

POWER

PHANTOM

MONO IN

+48V

LS (3-6)

213

PUT CHANNE

MICIN

LINE IN

STEREO IN

LEFT( MONO)

RIGHT

AUX RETURN

STEREO

LEFT( MONO)

RIGHT

8. TECHNICAL SPECIFICATION

Mono input channels

Microphone input Frequency response Distortion (THD&N)

Gain range 0dB to 60dB(MIC) SNR (Signal to Noise Ratio) Line input Frequency response Distortion (THD&N) Sensitivity range

Stereo input channels

Line input Frequency response Distortion (THD&N)

Impedances

Microphone input Channel Insert return All other inputs Tape out

All other output

Equalization

Hi shelving Mid bell Low shelving

Main Mix Section

Noise (Bus noise) Fader 0 dB, channels muted:

Max output

AUX Return gain range AUX Sends max out

Power supply (AC/AC Adaptor)

Type Input Power Transformer

Physical

Dimension (W D H) Net weight

electronically balanced, discrete input configuration 10Hz to 55kHz, 3dB+/

0.005% at 4dBu, 1kHz+

115dB electronically balanced

10Hz to 55kHz, 3dB+/

0.005% at 4dBu, 1kHz+ 15dBu to 45dBu

balanced 10Hz to 55kHz, 3dB

0.005% at +4dBu, 1kHz

1.4Kohm

2.5Kohm

10Kohm or greater 1Kohm

120ohm

15dB @12kHz 12dB @2.5kHz

15dB @80Hz

Fader 0dB, all input channels assigned

+22dBu unbalanced, 1/4" jacks

- to +15dB

+22dBu

Linear, External 18VAC

11Watts External Wall Mount

171mm 224mm 34/40mm (6.73" 8.82" 1.18"/1.57")

1.33Kg (2.93lb) Without Adaptor

100.0dBr (ref.:+ 4dBu)

and set to UNITY gain: 90dBr (ref.: 4dBu)+

9. WARRANTY

1. WARRANTY REGISTRATION CARD

To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date.

All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a more effective and efficient after-sales warranty service.

Please fill out all the information carefully and genuinely, miswriting or absence of this card will void your warranty service.

2. RETURN NOTICE

2.1 In case of return for any warranty service, please make sure that the product is well packed in its original shipping carton, and it can protect your unit from any other extra damage.

2.2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine, and give detail

information about your return address and contact telephone number.

2.3 A brief description of the defect will be appreciated.

2.4 Please prepay all the costs involved in the return shipping, handling and insurance.

3. TERMS AND CONDITIONS

3.1 warrants that this product will be free from any defects in materials and/or workmanship for a period

LTO

of 1 year from the purchase date if you have completed the Warranty Registration Card in time.

3.2 The warranty service is only available to the original consumer, who purchased this product directly from the

retail dealer, and it can not be transferred.

3.3 During the warranty service, may repair or replace this product at its own option at no charge to you for

LTO

parts or for labor in accordance with the right side of this limited warranty.

3.4 This warranty does not apply to the damages to this product that occurred as the following conditions:

Instead of operating in accordance with the user's manual thoroughly, any abuse or misuse of this product.

Normal tear and wear.

The product has been altered or modified in any way.

Damage which may have been caused either directly or indirectly by another product / force / etc.

Abnormal service or repairing by anyone other than the qualified personnel or technician.

And in such cases, all the expenses will be charged to the buyer.

3.5 In no event shall be liable for any incidental or consequential damages. Some states do not allow the exclu-

LTO

sion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.

3.6 This warranty gives you the specific rights, and these rights are compatible with the state laws, you may also

have other statutory rights that may vary from state to state.

SEIKAKU TECHNICAL GROUP LIMITED

No. 1, Lane 17, Sec. 2, Han Shi W. Road, Taichung, 401 Taiwan

http://www.altomobile.com Tel: 886-4-22313737

email: info@altomobile.com Fax: 886-4-22346757

customer feedback, product features, specifications and/or internal/external design may be

changed without prior notice. No photocopying, translation or reproduction of any part of this user

NF01090-1.0

Nilfisk S-6 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual