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Safety instructions

We invite you to read the instructions on the proper use of your product carefully. They will ensure the proper functioning 
of the latter and it safely.

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Do not use this device in a wet area, near water, do not expose to rain or moisture.
Do not place any objects filled with liquids such as vases or some others on the top or around.
Do not move the product if it has just been used or if it is still hot.
Do not install near heat sources.To avoid being overheated please keep the unit’s ventilation open.
Never cover the ventilation of the unit.
Amplifier should install steadily and make sure all four feet are on the same level.
Keep the amplifier in 15 cm’s distance to the surrounding walls.
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.
Clean only with a dry cloth. As a precaution, it is best to unplug the unit before handling and ensure the heat generated 
by the product has been properly dissipated.
Please move the amplifier carefully not to drop the unit or be subject to other strong shocks.
Unplug the power cord if you are not going to use the product for an extended period of time or during lightning storms.
Take great care of electrical connections (power cord and plugs). In particular, do not walk on, or press the power cord, 
specifically at plugs, power plant and the output of the power supply.
Be sure to use an appropriate power supply to the power jack on the unit outlet. Especially if the device is equipped 
with a ground plug, it is necessary to use it.
Forbidden to operate when the output is open or shorted.
Do not attempt to service this product yourself. Opening the cover may expose you to dangerous voltage or other 
hazards.
Use only spare parts and accessories recommended by Line Magnetic.
We are not responsible for any problems caused by checking and opening without permission of our company. For 
service, please contact a local dealer or qualified service technician.

Power output: 24W

Working conditions: 

Temperature: 0°C to 40°C 

Moisture: 20% to 80%

Frequency response (±1,5dB): 15Hz-35KHz 

Storage conditions: 

Temperature: -20°C to 70°C 

Moisture: 20% to 90%

Input sensitivity: 1000mV

THD: 1%

S/N ratio: 87dB

Dimensions (W x H x D): 287 x 279 x 574 mm

Input impedance: 100kΩ

Output impedance: 4Ω, 8Ω, 16Ω

Tubes: 1x 310A, 1x 300B, 1x 845, 1x 5U3C 

Net weight: 32kg

Power requirements: 230V ±5% (50Hz)

Power consumption: 290W

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Summary of Contents for LM-503PA

Page 1: ......

Page 2: ...OWNER S MANUAL LM 503PA...

Page 3: ...g 14 Thank you for choosing a Line Magnetic product Its implementation has been our know how both in terms of design to the manufacturing Electronic components and mechanical parts correspond to the s...

Page 4: ...local dealer Hand made construction with the finest point to point wiring Specially designed toroid transformer for power supply In the pre stage we are using 310A tube developed by our company and in...

Page 5: ...ubject to other strong shocks Unplug the power cord if you are not going to use the product for an extended period of time or during lightning storms Take great care of electrical connections power co...

Page 6: ...ut voltage level of the amplifier is 240VAC 5 and please make sure that your local voltage is the same as indicated on the rear panel A too low or too high voltage can cause serious damage to your amp...

Page 7: ...dealer or the company responsible for the power supply in your area Turn off device if you do not intend to use this unit for a long time In case of prolonged absence from home it is recommended to un...

Page 8: ...of the amplifier is 240VAC 5 and please make sure that your local voltage is the same as indicated on the rear panel A too low or too high voltage can cause serious damage to your amplifier In case yo...

Page 9: ...the terminals Important Note Check the impedance of your speakers When using a pair of speakers you can use speakers with an impedance of between 4 8 and 16 ohms BE SURE TO USE THE MATCHING TERMINALS...

Page 10: ...turned off Bias adjustment Hum adjustment WARNING When making adjustments be careful not to burn yourself with tubes that are very hot Turn on the amplifer and wait for around ten minutes Choose and...

Page 11: ...THE MATCHING TERMINALS 0 4 8 16 SELECTOR 220V 50Hz 45W T5AL250V LM 503 PA Speaker connection 1 Unscrew the terminal by hand 2 Insert the loudspeaker cable refer to the diagram below 3 Screw the termin...

Page 12: ...se do not insert the power cord into the main socket until all sources are connected 3 R refers to the Right channel while L represents the Left channel Do not also fasten signal cables together with...

Page 13: ...OR button located to the right of the front panel 5 Adjust the VOLUME knob as you like to enjoy your music WARNING Please make sure corresponding voltage is the same as required We are not responsible...

Page 14: ...treated cloth for cleaning 3 Use a soft cloth with neutral detergent first and then wipe with a dry cloth As a precaution it is best to unplug the unit before handling and ensure the heat generated by...

Page 15: ...ie microwave oven and restart the amplifier Batteries of the remote control are low Please replace the batteries Obstacle is located between the remote control and the amplifier Move the object that b...

Page 16: ...Line Magnetic Australia Pty Ltd Email service line magnetic com au www line magnetic com au...

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