Alto ALTO LINK User manual

ALTO LINK
SPLITTER / MIXER
User's Manual
LTO
R
www.altoproaudio.com
Version 1.3 September 2005
English

SAFETY RELATED SYMBOLS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol, wherever used, alerts you to the pre-
sence of un-insulated and dangerous voltages with-
in the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
This symbol, wherever used, alerts you to impo-
rtant operating and maintenance instructions.
Please read.
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.
Protective Ground
Operating Conditions
IMPORTANT SAFETY INSTRUCTIONS
Cleaning
Servicing
Power Cord and Plug
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.
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.
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.
Read these instructions
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
Only use attachments/accessories specified by the
manufacturer.
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.
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.
Refer all servicing to qualified service personnel only.
Do not perform any servicing other than those instruc-
tions contained within the User's Manual.
Fuse
To prevent fire and damage to the product, use only
No user serviceable parts inside.
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.
WARNING
1
Disposing of this product should not be
placed in municipal waste and should be
Separate collection.

PREFACE
Dear Customer:
Thanks for choosing LTO LINK SPLITER/MIXER and thanks for choosing one of the results of LTO AUDIO TEAM's
work and researches.
For our LTO AUDIO TEAM, music and sound more than a job are first of all passion and let us say our obsession!... ...
the world in the audio field.
Software Team for the last 7 years.
quality of our job, we like to share with you our work and our dreams, paying 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
The is versatile for you to use in several areas: you can use it as 8-in, 2-out Mixer, 2-in,LTO LINK SPLITER/MIXER
8 out splitter. You can also use it as a 6-in, 6-OUT Line Driver or DI-box etc.
Thank you very much
AUDIO TEAMLTO
2
We have been designing professional audio products for a long time in cooperation with some of the major brands in
The LTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R&D
Centers in Italy, Netherlands, United Kingdom and Taiwan. The core of our digital audio products is a sophisticated
DSP (Digital ound rocessor) and a large range of state of the art algorithms which have been developed by ourSP
Because we are convinced you are the most important member of LTO AUDIO TEAM and the one confirming the
you and we will guarantee you also in future the best quality, the best fruits of our continuous researches and the best
prices.
Nothing else to add, but that we would like to thank all the people that made the LTO LINK SPLITER/MIXER, and
thank our designers and all the LTO staff people who make possible the realization of products containing our idea
of music and sound and are ready to support you, our customers, in the best way, conscious that you are our best
richness.

TABLE OF CONTENT
1. INTRODUCTION.................................................................................................................................4
2. FEATURE LIST...................................................................................................................................4
3. CONTROL ELEMENTS.....................................................................................................................4
3.1 The Front Panel
3.2 The Rear Panel
4. INSTALLATION & CONNECTION.....................................................................................................6
4.1 Mains Connection
4.2 Audio Connection
4.3 Rack Mounting
5. APPLICATIONS.................................................................................................................................8
5.1 How to use LTO LINK as the splitter
5.2 How to use LTO LINK as the mixer
6. SPECIFICATIONS..............................................................................................................................9
7. SYSTEM BLOCK DIAGRAM...........................................................................................................10
8.WARRANTY......................................................................................................................................11
3

1. INTRODUCTION
First, Let's give our sincere appreciation for your confidence in products by purchasing our LINK,LTO LTO
SPLITTER / MIXER, it is really the most effective support to us. Herewith, we can assure you that it will be one of the
best choices you have ever made, and wish you will enjoy your audio systems with the LINK all the times.LTO
The LINK is in fact the good solutions for many problems of the large scale sound reinforcement systems andLTO
PA applications, and it can be used as a splitter or a mixer.
For splitter application, just apply the main signal input from the MAIN IN sockets, and select the SPLITTER mode for
each individual channel, then six mono outputs can be gotten. By depressing the MAIN MIX button, two further outputs
can be provided.
For mixer application, select the MIXER mode for individual channel, and feed the input signal from the mono input,
then six input signals can be mixed together, and output from the MAIN OUT. By depressing the MAIN MIX button, two
further inputs can be provided.
Anyway, please reserve your time to read this manual before running the unit, and you will be the real master of your
LTO LINK.
2. FEATURE LIST
1 rack size.
SPLIT / MIX switch for each mono channel.
2 input, 6+2 outputs splitter.
8 Balance / Pan control for each channel.
Main input and output level control.
MAIN LINK function allows to route the MAIN IN signal to MAIN OUT, vice versa.
Level meters for each stage.
XLR balanced connectors for 4 mono channels, and TRS type for another 2 mono channels.
Dual voltage unit for global operation.
4
3. CONTROL ELEMENTS
On the except for the main common section, there are total six same mono channels. Each channel isLTO LINK,
presented with two rotary controls, one button, and four LEDs.
3.1 The Front Panel
R
LTO
ON
OFF
0
20
15
12
9
SPLITTER
6
INPUT LEVEL (dB)
12 0CLIP
MAIN INPUT LEVEL
MAIN
LINK
MIXER
0
OUTPUT LEVEL (dB)
MAIN OUTPUT LEVEL
SPLIT / MIX
INPUT / OUTPUT LEVEL (dB)
0CLIP
0
LEFT RIGHT
LEVEL BALANCE / PAN
SPLIT / MIX
INPUT / OUTPUT LEVEL (dB)
0
LEVEL BALANCE / PAN
SPLIT / MIX
INPUT / OUTPUT LEVEL (dB)
0
LEVEL BALANCE / PAN
CHANNEL 3
INPUT / OUTPUT LEVEL (dB)
0
LEVEL BALANCE / PAN
CHANNEL 4
INPUT / OUTPUT LEVEL (dB)
0
LEVEL BALANCE / PAN
CHANNEL 5
INPUT / OUTPUT LEVEL (dB)
0
LEVEL BALANCE / PAN
CHANNEL 6
CLIP
12 CLIP CLIP CLIP CLIP CLIP
LINK
12 12 12 12
SPLITTER
MIXER
12
12
SPLITTER
MIXER
CHANNEL 2CHANNEL 1
12
12
SPLITTER
MIXER
SPLIT / MIX
SPLITTER
MIXER
12
12
SPLIT / MIX
SPLITTER
MIXER
12 12
SPLIT / MIX
SPLITTER
MIXER
12
12
0
20
15
12
9
6
0
20
15
12
9
6
0
LEFT RIGHT
0
20
15
12
9
6
0
LEFT
0
20
15
12
9
6
0
LEFT
0
20
15
12
9
6
00
20
15
12
9
6
0
LEFT
0
20
15
12
9
6
RIGHT RIGHT LEFT RIGHT RIGHT
POWER
LTO LINK
SPLITTER/MIXER
1
2
7
69
4
3 5 8
(1). MAIN INPUT LEVEL control
This knob is used to adjust the level of the main input signal, and its adjustable range goes from - to +15dB.
(2). INPUT LEVEL meter
This 4-digit meter tells you the level of the main input signal. While the Clip LED lights up, please turn down
the main input signal, otherwise, the system will be distorted.
(3). MAIN LINK control
Use this switch to link the MAIN IN with the MAIN OUT.
(4). MAIN OUTPUT LEVEL control
This knob is used to adjust the level of the main output signal, and its adjustable range goes from - to +15dB.

3.2 The Rear Panel
(10). FUSE HOLDER / VOLTAGE SELECTOR
This is a dual voltage unit. Before you attempt to connect and operate the unit, please make sure that your local
voltage matches the voltage on the fuse-holder cover.
TIP RING SLEEVE
CHANNEL 5
OUTPUT INPUT OUTPUT INPUT
TIP RING SLEEVE
AC INPUT
95-120V~/210-240V~60-50Hz
Rated Power Consumption 15W
FUSE:
210-240V:T200mAL 250VAC
95-120V:315mA250VAC
REPLACE FUSE WITH
CORRECT TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
OUTPUT OUTPUT OUTPUT RIGHT RIGHT
INPUT INPUT INPUT LEFT LEFT
PIN 2 PIN 1
PIN3
OUTPUT INPUT
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3 PIN 2 PIN 1 PIN3
CHANNEL 6 CHANNEL 1 CHANNEL 3CHANNEL 4 MAIN INCHANNEL 2 MAIN OUT
A101
110-120V
220-240V
12
3
12
3
12
3
12
3
12
3
12
3
12
3
10 11 15 14 13 12
5
Caution: The fuse protecting the AC supplies circuits of this unit. The fuse can only be changed by a qualified
technician, in the event of a fault or changing the supply voltage. If the fuse continues to blow
after replacing, discontinue use of this unit before repaired.
110-120V
220-240V
THIS IS SET FOR
110V AC TO 120V
AC OPERATION
THIS IS SET FOR
220V AC TO 240V
AC OPERATION
220-240V
110-120V
(5). OUTPUT LEVEL meter
This 4-digit meter tells you the level of the main output signal. While the Clip LED lights up, please turn down
the main signal at either each input stage or the main output stage, otherwise, the system will be distorted.
(6). SPLIT / MIX
Use this switch to select the specific operational mode for each individual mono channel.
For SPLITTER mode, please let the switch released, and the main input signal can then be split into each mono
channel output.
For MIXER mode, please engage this switch, and now, the mono channel input signal will be sent to the main
output bus, combined with the main input signal on condition that the MAIN LINK is activated, you can get the
mixed signal output from the MAIN OUT sockets.
Further, also for the MIXER mode, you can route the mono channel input signal to the mono channel output
directly.
(7). LEVEL control for each channel
This knob is used to adjust the level of each mono channel, and its adjustable range goes from - to +15dB,
definitely,
In SPLITTER mode, this control is used to determine the output level of each individual mono channel.
While in MIXER mode, this control can be used to determine how much the mono channel input signal is sent
to the main output bus and/or each individual mono channel output.
(8). INPUT / OUTPUT LEVEL meter
This 4-digit meter tells you the output level of each mono channel, while the Clip LED lights up, please turn
down the level control, otherwise, this channel will be distorted.
(9). BALANCE / PAN control
Generally, the main section uses the stereo input and output, while, for each individual channel, mono application
is configured.
So, if the stereo main signal is split into the mono channel output, or the mono input signal is routed to the
stereo main output bus, please use this knob to determine the proportion between the left and the right.

4. INSTLATION & CONNECTION
6
(11). AC inlet
This connector is meant for the connection of the supplied main cord. Do not insert power cable into the unit
until the rectly set.voltage has been correctly set. Do not plug power cable into AC power until voltage has been cor
(12). MAIN INPUTS
These two XLR balanced connectors are used to input the main stereo signal. In SPLITTER mode, it can be split
into each mono channel output.
(13). MAIN OUTPUTS
These two XLR balanced connectors are used to output the main stereo signal. By depressing the MAIN LINK,
it can be linked with the MAIN IN directly.
(14). INPUT for the mono channel
For Channel 1~4, use the XLR balanced connectors to input the mono signal, while, for Channel 5~6, please
use the TRS type.
(15). OUTPUT for the mono channel
For Channel 1~4, use the XLR balanced connectors to output the mono signal, while, for Channel 5~6, please
use the TRS type.
printed next to these markers.
To change, pull fuse-holder out and rotate 180 ,then push in again.
The fuse-holder above the AC connector on the rear of the chassis has 3 triangular markers(please refer to
the above pictures), with two of these triangles opposing each other, your unit is set to the operating voltage
The mains connection of the LTO LINK is made by using the enclosed mains cord and a standard IEC
receptacle. It meets all of the international safety certification requirements.
4.1 Mains Connection
This is a dual voltage unit. Please ensure that the LTO LINK is set to the correct supply voltage before
plugging the power cord into the wall outlet, use the same fuse as marked on the fuse holder at the AC power
connection socket.
Do not insert power cord into the unit until voltage has been correctly set. Do not plug the power cord into AC
power until voltage has been correctly set.
4.2 Audio onnectionC
several ways to support a variety of applications without any signal loss.
a. Wiring Configuration
unbalanced modes, which will be determined by the actual application status, Please wire your systems as the
following examples:
Either the 1/4" TRS (Tip-Ring-Sleeve) phone jack or the XLR servo connector can be wired in balanced and
The LTO LINK presents with balanced XLR connectors and 1/4" TRS phone jack and it can be interfaced by
For 1/4" Phone jack
TS Type Unbalanced
Sleeve
Tip
+
TRS Type Balanced
Tip
Ring
Sleeve
+
-
TRS Type Unbalanced
Tip
Ring
Sleeve
+

7
b. In Line Connection
with most professional audio devices. Follow the configuration examples below for your particular connection.
4.3 Rack ountingM
The most secure mounting is on a universal rack shelf available from various rack manufactures or your music
dealer. The LTO LINK fits into one standard 19" rack unit of space. Please allow at least an additional 4" depth
and please do not place the LTO LINK on high temperature devices such as power amplifiers etc. to avoid
overheating.
for the connectors on the rear panel. Be sure that there is enough air space around the unit for sufficient ventilation
For these applications, the LTO LINK provides XLR connectors and 1/4" TRS phone jack to easily interface
For XLR connector
XLR Type Unbalanced XLR Type alancedB
Pin3 (-)
Pin2 (+)
Pin1 ( )
(Linked to Pin1 manually, )
Pin1 ( )
Pin2 (+)
Pin3 (-)
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Sleeve
Tip
Sleeve
Tip
Sleeve
Cent er
Cent er
Centre
Screen
Screen
Screen
1
2
3
Tip
Ring
Sleeve
1
2
3
1
2
3
TIP SLEEVE
TIP SLEEVE
TIP RING SLEEVE
TIP RING SLEEVE
12
3
21
3
21
3
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Ring
Sleeve
1
2
3
1
2
3
1
2
3
Tip
Ring
Sleeve
1
2
3
Tip
Sleeve
1
2
3
TIP RING SLEEVE
TIP RING SLEEVE
TIP SLEEVE
SLEEVE RING TIP
Unbalanced
TIP RING SLEEVE
Balanced
21
3
12
3
12
3
12
3
12
3
SLEEVE TIP
SLEEVE RING TIP

8
5. APPLICATIONS
From the panel introduction on the chapter 3, you must have caught a clear answer to " What is it?" in your mind as
to our LINK, SPLITTER / MIXER, hereafter, we will show you the further explanation on "How to use it?", soLTO
that, you can be the real master of this unit.
5.1 How to use LINK as the splitterLTO
Sometimes, in the large scale PA / sound reinforcement systems, you may be disturbed by this kind of problems:
one pre-send signal needs to be monitored by several groups, or the main mix output of the console should be
transited to several power amplifiers, etc.
And now, with your LINK, you will get the best solution.
LTO
Connect the LINK into your systems as the demonstrated, you can split a specific main input signal into upLTO
to 6 outputs. With the MAIN LINK button depressed, 2 further outputs are added.
TIP RING SLEEVE
CHANNEL 5
OUTPUT INPUT OUTPUT INPUT
TIP RING SLEEVE
AC INPUT
95-120V~/210-240V~60-50Hz
Rated Power Consumption 15W
FUSE:
210-240V:T200mAL 250VAC
95-120V:315mA250VAC
REPLACE FUSE WITH
CORRECT TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
OUTPUT OUTPUT OUTPUT RIGHT RIGHT
INPUT INPUT INPUT LEFT LEFT
PIN 2 PIN 1
PIN3
OUTPUT INPUT
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3 PIN 2 PIN 1 PIN3
CHANNEL 6 CHANNEL 1 CHANNEL 3CHANNEL 4 MAIN INCHANNEL 2 MAIN OUT
A101
110-120V
220-240V
12
3
12
3
12
3
12
3
12
3
12
3
12
3
Main input
signal
Two further
outputs
Output 1Output 2Output 3Output 4Output 5Output 6
In this application, use the SPLIT/MIX switch to select the SPLITTER operational mode for each mono channel,
apply the main signal from the MAIN IN sockets, and get the 6 outputs from the mono OUTPUT sockets of each
channel.
While the MAIN LINK is engaged, the MAIN OUT will also be linked with the MAIN IN signal, and two further outputs
are provided.
5.2 How to use LINK as the mixerLTO
This application is widely used for the mixing of one group main stereo signal with several mono signals.
TIP RING SLEEVE
CHANNEL 5
OUTPUT INPUT OUTPUT INPUT
TIP RING SLEEVE
AC INPUT
95-120V~/210-240V~60-50Hz
Rated Power Consumption 15W
FUSE:
210-240V:T200mAL 250VAC
95-120V:315mA250VAC
REPLACE FUSE WITH
CORRECT TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
OUTPUT OUTPUT OUTPUT RIGHT RIGHT
INPUT INPUT INPUT LEFT LEFT
PIN 2 PIN 1
PIN3
OUTPUT INPUT
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3
PIN 2 PIN 1
PIN3 PIN 2 PIN 1 PIN3 PIN 2 PIN 1 PIN3
CHANNEL 6 CHANNEL 1 CHANNEL 3CHANNEL 4 MAIN INCHANNEL 2 MAIN OUT
A101
110-120V
220-240V
12
3
12
3
12
3
12
3
12
3
12
3
12
3
Main mixed
signal output
Two further
iutputs
Input 1Input 2Input 3Input 4Input 5Input 6
In this application, use the SPLIT/MIX switch to select the MIXER operational mode for each mono channel, input
the signal from the mono INPUT of each channel, and output the main mixed signal from the MAIN OUT sockets.
While the MAIN LINK is engaged, the MAIN IN will also be linked with the MAIN OUT signal, and two further input
signals can be mixed with the main output signal.

9
6. SPECIFICATIONS
AUDIO INPUTS Connectors XLR and 1/4" TRS
Type RF filtered, servo-balanced input
Impedance 50 kOhms balanced, 25 kOhms unbalanced
Nominal operating level -10 dBV to +4 dBu
Max. input level +21 dBu balanced and unbalanced
CMRR Typ. 40 dB, > 55 dB @ 1 kHz
AUDIO OUTPUTS Connectors XLR and 1/4" TRS
Type Electronically servo-balanced output stage
Impedance 60 Ohms balanced, 30 Ohms unbalanced
Max. output level +22 dBu balanced and unbalanced
SYSTEM SPECIFICATIONS
Frequency response
S/N ratio
THD
5 Hz to 200 kHz, +/- 3 dB
>95 dBu, unweighted, 22 Hz to 22 kHz
0.002 % typ. @ +4 dBu, 1kHz, gain 1
FUNCTION CONTROLS Main input level
Main output level
Level
Balance/pan
variable
variable
variable for each channel
placing in the stereo field
FUNCTION SWITCHES Main Link
Split/mix
links the main input signal to the main output
changeover from split to mix mode for each channel
INDICATORS Input level (main)
Output level (main)
Input/output level
4-digit LED display: -12/0/+12/Clip
4-digit LED display: -12/0/+12/Clip
4-digit LED display: -12/0/+12/Clip
POWER SUPPLY Mains Voltages
U.K./Australia
Europe
USA/Canada 120V ~, 60 Hz
240V ~, 50 Hz
230V ~, 50 Hz
General Export Model
100-120V ~, 200-240V ~, 50 - 60 Hz
Power Consumption max. 15 Watts
Fuse 95 - 120 V ~: T 315 mA H
210 - 240 V ~: T 200 mA H
Mains Connection Standard IEC receptacle
PHYSICAL WEIGHT Dimensions (H*W*D) 483(W) 217(D) 44(H)mm (19" 8.54" 1.7")
Net Weight 3 kg(6.4lb)
Shipping Weight 3.8 kg