FiveO LIBRA 600 User Manual

LIBRA SERIES

English

Professional Power Amplifier

User s Manual'

1

CONTENTS

Professional Audio Equipment

Contents .......................................................................................................................................................1

Important precautions ..................................................................................................................................2

Safety instructions........................................................................................................................................3

Features description .....................................................................................................................................3

EX-factory settings .......................................................................................................................................3

Front panel...................................................................................................................................................4

Front panel description ...............................................................................................................................4

Rear panel....................................................................................................................................................5

Rear panel function description....................................................................................................................5

Basic operation.............................................................................................................................................7

Set up connection mode (LIBRA 600 LIBRA 1200).....................................................................................8

Set up connection mode (LIBRA 2000 LIBRA 2600) ..................................................................................9

Protection circuits ......................................................................................................................................10

Applications ...............................................................................................................................................10

Maintenance and troubleshooting............................................................................................................10

Block diagram ............................................................................................................................................11

Specifications..............................................................................................................................................12

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Professional Audio Equipment

IMPORTANT PRECAUTIONS

1.Read all documentation before operating your equipment.

2.Retain all documentation for further reference.

3.Mains voltage must correspond to rear unit label.

4.Damages caused by connecting to improper AC voltage are not covered by any warranty.

5.Always operate the unit with the AC ground wire connected to the electrical system ground.
Precautions should be taken to avoid equipment faulty, improper or inefficient grounding.

6.After connection to power supply Standby LED is lit, showing that some components inside are
already powered.

7.Do not connect any amplifier channel output into another channel input. Do not connect in parallel or
series an amplifier output with any other amplifier output.

8.In system setup, amplifier's output power should be 50% greater than loudspeaker(s) rated handling
power.

9.Make sure the signal is correctly connected to amplifier input channel following current input mode.

10.Please turn off the power switch when extracting the power cord and signal cable, or adjusting the
input mode switch.

11.In order to split one signal to more than one amplifier, we suggest to use a signal distributor.

12.In typical use, please set the volume to -0dB position.

13.If you need to supply power to more than one unit power amplifiers,to eliminate the big surge current
interference to electricity net, and preventing the voltage fluctuate abnormal when simultaneously
switching on the amplifiers, we recommend you use the sequence power procedure.

14.Do not obstruct the air entrance and exit ports.

Safety instructions

Read all safety instructions before operating the amplifier.
Install equipment as follows:

=Install in a flat place, not bending or curved.
=Do not install near water and moisture.
=Place power amplifier away from heat sources, such as radiators or other heat source.

Keep in mind the following instructions when connecting amplifiers:

=Read the user manual before connecting the amplifier.
=Properly connect each connection of the amplifier. If not, it may cause hum, damage and/or electric

shock in case of disconnection.

=To prevent electric shocks, do not open top cover.
=Safely connect the power cord after checking the AC power.

CAUTION

Warning: Dangerous non insulated high voltage components inside
should cause electric shock. Do not open. In case of failure
return to authorized service centre to be repaired by skilled
personnel.To reduce the risk of fire or electric shock do not
expose this equipment to rain or moisture.

Features description

1. All the volume adjustment knobs were set at "-80dB" .

2. The power switch was set at "OFF".

3. Peration mode selector was set at "STEREO".

4. Input sensitivity switch was set at "1.0V".

Ex-factory settings

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Professional Audio Equipment

1.Power supply

1.1 It is a very high density power level of SMPS power supply, thus supplying up to constant 3.2kw
sine wave power in 2U height and 11 inch depth case. It is the top level in this industry.

1.2 It uses LLC SMPS to provide power safely and efficiently. It turn on ZVS when 0 voltage, and shut
off ZCS when 0 current.

1.3 The normal SMPS load is invariable, but SMPS load of amplifier is fluctuating for fast impedance
change in 0.0001s. Even the minimum time from 0 current to rated current is 0.0001s. The SMPS
used by us has been designed to support critical working situation and fulfil the dynamic
requirement of music playing.

1.4 Power circuit is fully protected to avoid high frequency current pass through the low frequency
current capacitor & electro analysis.

1.5 SMPS has good performance from in 180V-260V range, therefore it will not be damaged by
voltage fluctuations.

2. Amplifier

2.1 SMPS amplifier has very high working efficiency in 8-Ohm & 4-Ohm loads. LIBRA 1200 and 1600
are Class AB amplifiers, while LIBRA 2000 and 2600 are class 2H amplifiers. At rated power, all
LIBRA series amplifiers working efficiency can reach 65% & 60% at 8-Ohm & 4-Ohm.

2.2 The output transistor are directly connected to the heat sink to increase the heat transmitting
efficiency and extend the transistors life.

2.3 Central air passage and heat sink, as well as the 80x80 fan between the power supply module and
main module increase the efficiency of fan and separate the 2 working modules as well as to
decrease the noise.

2.4 The main amplifier circuit and protection system separately designed,improving the complete signal
circuitry.

2.5 The amplifier case is made of steel and all the PCB is supported by copper column.It is more rugged
and it represents professional amplifier higher quality.