Alto Professional MX-20P User Manual
User's Manual
MX-20P
2-CHANNEL POWERED MIXER
2-CHANNEL POWEREDMIXER
R
LTO
www.altoproaudio.com
Version 1.1 Septemper 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 , which is the result of our LTO AUDIO TEAM's
LTO MX-30P 3-Channel POWERED Mixer
endeavours.
For the LTO AUDIO TEAM, music and audio are more than a job, it is a passion and an obsession!
We have been designing professional audio products for a long time in cooperation with some of the major brands in
the world in the audio field.
Because we are convinced you are the most important member of LTO AUTIO TEAM and the one confirming the
quality of our job, we like to share with you our work and our dreams, pay attention to your suggestions and your
comments.
Following this idea we create our products and we will create the new ones! From our side, we guarantee you and
we will guarantee you also in future the best quality, the best fruits of our continuous researches and the best prices.
Our LTO MX-20P 2-CHANNEL POWERED MIXER has extensive features i.e. 2 phono/line inputs; 1 microphone input;
treble, middle and bass EQ on each channel; crossfader control etc., which are suitable for many other professional
applications.
We would like to thank all the people who made the LTO MX-20P 2-CHANNEL POWERED MIXER, 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. FEATURE LIST.......................................................................................................................................4
3. CONTROL ELEMENTS........................................................................................................................5
3.1 The Top Panel
3.1.1 The CHANNEL Section
3.1.2 The MIC/MAIN Section
3.1.3 The PFL (pre fader level) Section
3.1.4 The LEVEL METER Section
3.1.5 The CROSSFADER Section
3.2 The Front Panel
3.2.1 MIC IN Jack
3.2.2 PHONE OUT Jack
3.3 The Rear Panel
3.3.1 POWER IN
3.3.2 SPEAKER OUT
3.3.3 MAIN OUT
3.3.4 INPUT
3.3.5 GND Screw
3.4 The Power Supply Box
3.4.1 POWER CORD
3.4.2 POWER SWITCH
3.4.3 AC FUSE HOLDER
3.4.4 DC OUTPUT
3.4.5 FAN
4. TECHNICAL ...........................................................................................................10SPECIFICATIONS
5. SYSTEM BLOCK DIAGRAM...............................................................................................................11
6. WARRANTY.........................................................................................................................................12
3
1. INTRODUCTION
What a great powered mixer you have just bought! Your MX-20P is packed with features such as 2 phono inputs, 2 line
inputs, 1 microphone input, 3 bands equalizer and gain control for per channel.
Though your MX-20P is very easy to operate, please go through this manual carefully and you will get the best out
of your MX-20P.
2. FEATURE LIST
5 inputs: 2 phono and 2 line inputs, 1 microphone input
2 master output through RCA connector, headphone output via 1/4" TRS jack
Crossfader control
PFL button
Gain control on each channel
Treble, middle and bass equalizer on each channel
Highly accurate LEDs Meter (10-segment)
Dynamic power:
Manufactured under QS9000, VDA6.1 certified management system
2 300W 4
4
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