Page 1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
IMPORTANT SAFETY INSTRUCTION
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.
WARNING
To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Dispose of this product should
notbeplacedinmunicipalwaste
and should be separate collection.
11.
12. MovethisEquipmentonlywithacart,
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.
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:
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.
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 TerminalAC mains (Alternating Current)Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
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.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
Read this Manual carefully before operation.
Keep this Manual in a safe place.
Be aware of all warnings reported
with this symbol.
Keep this Equipment away from water and
moisture.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
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
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
periods of time or during a storm.
Refer all service to qualified service personnel
only. Do not perform any servicing other than
those instructions contained within the
User's Manual.
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.
HOURS X DAY EXAMPLE
8
6
4
3
2
1,5
1
0,5
0,25 or lessSPL
90
92
95
97
100
102
105
110
115Small gig
train
Subway train
High level desktop monitorsClassic music concert
Rock concert
Page 2
1
1. INTRODUCTION
Thank you for your purchasing of the LTO A400.4 Dragonfly digital stereo
amplifier. It is just one of the many LTO products that a talented,
multinational Team of Audio Engineers and Musicians have developed with
their great passion for music. Your A400.4 is based on an advanced digital
amplifier circuit and Switch Mode Power Supply.
It is capable of 60 watt of power and it is possibly the smallest and lightest
amplifier in the world with such power. Yet, it is only 1/2 rack space and
1.5U in height for a total of 3.8 Kg!
Due to the amplifier efficiency of over 90% there is no need for a cooling
fan and therefore your A400.4 is perfectly suitable for Studio Application
as well as for amplification of compression drivers or full range speakers
where a very high SPL is not demanded.
Enjoy your A400.4 and make sure to read this Manual carefully before
operation!
2. FEATURES
Mountable in a 19" rack unit (1.5U) and 1 rack space,
Digital stereo amplifier/2
Hi-fi quality for Studio applications
Solid and durable, rack-mountable configuration
Switchable Clip-Limiter.
4 60 Watts continuous EIAJ on 4 Ohm
4 120 Watts dynamic power on 4 Ohm
4 COMBO input sockets compatible with balanced XLR and 1/4" TRS jack
Sockets for outputs
Front panel LED indicators for Clipping, Limiter, Power ON and Signal
Individual Channel level control
Manufactured under QS9000, VDA6.1 certified management system
IN THIS MANUAL:
1. INTRODUCTION..............................................................................
2. FEATURES.....................................................................................
3. CONTROL ELEMENTS...................................................................
4. OPERATION...................................................................................
5. TECHNICAL SPECIFICATIONS.........................................................
6. WARRANTY................................................................................... 1
1
4
6
8
9
