Line Magnetic LM-508IA Manuale utente

INTEGRATED VACUUM TUBE AMPLIFIER

LM-508IA

Thanks for choosing our Line Magnetic LM-508IA Integrated Amplifier as an important part of your

music system and please read the manual carefully before installation and operation.

In order to prevent damage during transportation the amplifier is packed with protective foams

surrounding the tubes. Before installation please remove these foams to avoid any risks.

Table of Contents

Table of Contents ------------------------------------------------------

Package Contents ------------------------------------------------------

Product Features -------------------------------------------------------

Specification ------------------------------------------------------------

Safety Precautions -----------------------------------------------------

Functions Description ------------------------------------------------

Connection --------------------------------------------------------------

Turning on --------------------------------------------------------------

Remote Control --------------------------------------------------------

Tube Replacement -----------------------------------------------------

Maintenance ------------------------------------------------------------

Warranty Statement ---------------------------------------------------

Troubleshooting -------------------------------------------------------

Suggestions:

LM-508IA Integrated Amplifier is designed and manufactured with our original parts and reaching the

best results. We are not responsible for problems and damages caused by non-original parts replacement

in the amplifier.

Please carefully check the package first and then open the package. Package contents include:

Package Contents

1. Line Magnetic LM-508IA 1

2. Main Fuses 2

3. Power cord 1

4. Remote control 1

5. 1.5V Batteries(AAA) 2

6. User’s Manual 1

7. Warranty Card 1 Note:All other parts except above are not included.

Recommendation:

Keep all packing materials for future use and please fill in the warranty card for registration of warranty.

Note:

Please make sure local voltage level is matched with the input level of the amplifier which indicates on the

rear panel. Too low or too high voltage may cause problem and in case you've found improper voltage please

contact our company or our local agent.

Product features

.Black panel,both dignified and graceful.

.Poweramp adopt audio grade with 805 output high power tubes as single-ended

class A power amplification.

.Extraposition 805 current adjustment(BIAS ADJ.)and hum balance adjustment

(HUM BALANCE).

.You can use a variety of brands and models tubes,listen to the different rhyme.

.Totallyhandmade,The whole machine adopts some welding booths.

.Interstage use the German high quality N - cap coupling capacitance.

.Using two high quality EI to promote output transformer and output transformer.

.Using the specifical development for the native circular area power transformer.

.With high pressure power supply and the filament preheating function,extend the

life of the tube.

.Select the Japan ALPS high-grade motor potentiometer.

.Infrared remote control function.

Power output：48W＋48W

Frequency response：10Hz～50kHz（-1.5dB）

THD：1%（1kHz）

S/N Ratio：87dB A Weighted

Input Sensitivity：200mV（Integrated） Input Impedance：100kΩ

Output Impedance：4Ω ，8Ω ，16Ω

Power Requirements：～230V 5%（60Hz）

Dimension (WxDxH)： 430mmX420mmX270mm

Tube Complement：6SL7 x1、6SN7 x2、805 x2、300B x2 Net Weight：40kg

Power Consumption：400W

Working Condition: Temperature: 0℃～40℃ Moisture: 20%～80%

Storage Condition: Temperature: -20℃～70℃ Moisture: 20%～90%

Note

: Line Magnetic Audio reserves the right to change specifications at any time without

further notice in advance if products are upgraded. Specifications on the manual only show

the specifications of the amplifier you bought.

Specification

Safety precautions

1. Unplug the power cord if you are not going to use the product for an extended period of time.

2. Temperature will become higher after working in long period of time and please keep the unit's ventilation open

and install the amplifier at a well-ventilated place to avoid troubles and fire hazard.

3. Forbidden to operate as unloaded.

4. Forbidden to operate when the output is open or shorted.

5. Do not attempt to service this product yourself. Opening the cover may expose you to dangerous voltage or other

hazards.

6. We are not responsible for any problems caused by checking and opening without permission of our company.

For service, Please contact a qualified service technician.

7. Do not place any objects filled with liquids such as vases or some others on the top or around.

8. Clean only with dry cloth.

9. Please move the amplifier carefully not to drop the unit or be subject to other strong shocks.

10. Unplug the power cord if you are not going to use the product during thunderstorm.

Carefully read and follow the Manual for installation:

1. Do not place the product near heat sources such as radiators, heat registers or other products that produce heat.

2. In order to avoid being overheated please keep the unit’s ventilation open.

3. Do not expose this appliance to rain or moisture.

4. Amplifier should install steadily and make sure all four feet are on the same level.

5. Keep the amplifier in a certain distance so that it can be easily connected.

6. Keep the amplifier in 15CM’s distance to the surrounding walls.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert users

to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of

sufficient magnitude a risk shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of

important operating and maintenance (servicing) instructions in the literature accompanying the

appliance.

RISK OF ELECTRONIC SHOCK

DO NOT OPEN

CAUTION

.To reduce the risk of electric shock, do not remove the cover.

.No user serviceable parts inside. Refer servicing to qualified service personnel.

.To reduce the risk of fire or electronic shock, do not expose the unit to rain or moisture.

Note: Input voltage level of the amplifier is 230VAC～ 5% and please make sure that the supply

voltage is proper. Too low or too high voltage may cause problem or reduce its life.

Safety precautions

Functions Description

Front Panel: Work status indicator light/Mute indicator light：

Used to represent the working state of the

power amplifier,normal work to orange,When the

delay working state will flashing lights for 30

seconds.When the mute the light will flashing.

(remote control)

The volume control knob(VOLUME):

This knob can control the volume of the sound,In

accordance with the clockwise volume increased

gradually,Counterclockwise the volume decreases.

(remote control)

The input selection knob(SELECTOR):

Used to select input (LINE1 and LINE2,LINE3,prein)

audio source.

Remote control receiving window:

For receiving infrared remote control transmitter's

instruction.

The power switch(ON/OFF):Used for opening and closing power amplifier power supply.

VU table:

used to monitor power tube current and output level.

Power light.

Header back light switch.

Select 805 current or output power level.

Functions Description

Rear Panel:

Signal input terminal：

For the audio source.

The terminal of the right channel horn:

Used to connect to the right channel speakers.

The terminal of the left channel horn:

Used to connect to the left channel speakers.

Power input sockets, fuse blocks(FUSE):

Ac 220 v ～ the power input.

The fuse are installed in the fuse holder.

Please use only a fuse of the same specifications when replacing the fuse.

Overview from the top

Note: 1. Be careful of the high temperature of the tubes during

operation.

2. Driver tubes and Power tubes must be matched for

better results.

Functions Description

The choose of signal

feedback quantity.

805 power tube,V01 ,V02 current set-up.

On the first panel Bias/Meter selector switch to choose to Bias.Then put the volume down

to silent.Adjust V01 Bias, near the tube. The ADJ VU table pointer in 120（The fourth）as

shown in the figure.

Bias current adjustment for V02 is the same as for V01. Please adjust the corresponding

BIAS ADJ.and make sure all the bias level of V01, V02 are the same. In order to make

sure the amplifilier worksin its best condition please re-test each tube’s operatin state

after used 150 hours.

V03、V04：300B V05、V07：6SN7 V06：6SL7

Check the impedance of your speakers. Attach the positive from your speaker to the 4, 8 or 16 ohm terminals and the

negative to the 0 ohm terminals separately. 4 ohm, 8 ohm or 16 ohm impedance speakers are preferential and if your

speakers are 6 ohm it would not cause damage to the amplifier and experience using 4, 8, or 16 ohm positive terminal

to find what the best is for your speakers. Please take the right guidance for connection and do not mix as wrong

connection may cause noise or low grade function.

How to connect the speaker cables:

1.Unscrew the terminal knobs,

2.Insert the speaker cables,

3.Screw the terminal knobs.

speaker terminal

U type terminal

Note: Connect the speaker cables with the amplifier after it is well connected with the speakers.

Please notice the right direction indication of the cable and do not mix up the positive and the negative

end.

Speaker Connection

speaker(L) speaker(R)

Connection

Suggestions:

Here is the standard way of connection for LM-518IA with other audio equipments.

Please take pictures below for your reference:

Audio Connection

1.During installation please always refer to other products’ operation manuals.

2.Please do not insert the power cord into the main socket only if all other instruments are well connected.

3.R refers to right channel while L represents left channel.

4.Please take the right guidance for connection as wrong connection may cause noise or low grade function.

5.Do not fasten signal cables together with other cables just like the power cables to avoid disturbance.

Connection

Turning ON

Before turning on the amplifier please make sure all connections are right and power supply is stable.

1.Turn on the amplifier and the power LED will be on. It shines indicating that the amplifier is working.

2.In 30 seconds the power LED will keep lighting up. It means the amplifier functions very well. Or if the LED is not

on please contact with our local agent or our company.

3.Select the right sound source, adjust the volume to a certain position and then you can enjoy the music you prefer.

Connect to AC 230V ~50HZ

Note: 1.It is normal that power transformer becomes hot for extended period

of operation.

2.Please unplug the power cord if you’re not going to use the product for

an extended period of time.

3.Please do not insert the power cord into the mains socket only if all

other instruments are well connected

4.To prevent damage to the amplifier never cut off the speaker cables

while the unit is ON.

5.In order to protect the tubes please re-switch on the amplifier after

turned off in two minutes.

Warning: Please make sure corresponding voltage is the same as required.

We are not responsible for damage caused by misuse of unsuitable

voltage.

Precautions:

Connection of the power cord:

Connect the speaker cables and signal cables first and then plug the power cord into the power socket.

Before turning on the amplifier please make sure all connections are right and power supply is stable.

Turning ON

Indice

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