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Table of Contents
Related Manuals for Line Magnetic LM-503PA
Summary of Contents for Line Magnetic LM-503PA
- Page 1 VACUUM TUBE MONOBLOCK POWER AMPLIFIER LM-503PA...
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Page 2: Table Of Contents
Table of Contents Thanks for choosing our Line Magnetic LM-503PA Mono Block Tube Power Amplifier. Please read this manual carefully before installation and operation. In order to prevent damage during transportation, the amplifier and its tubes are packed with protective foam, please remove these foam pieces before operating your amplifier to avoid any risks ! -
Page 3: Package Contents
Product features 1. Hand-made construction with the finest point-to-point wiring. 2. LM-503PA uses specially designed high grade EI type of Class A output transformer with wide bandwidth. 3. Specially designed toroid transformer for power supply. 4. In the pre-stage we are using 310A tube developed by our company and in the driver stage it is 300B tube we have used. -
Page 4: Specification
Specification Safety precautions 1. Unplug the powercord if your are not going to use the amplifier for an extended periode of time. 2. The temperature of the amplifier will rise after a working for a long periode of time. Please keep the amplifier at a well ventilated place and make sure the ventilation openings are not blocked ! 3. -
Page 5: Connection
Too low or too high voltage may cause problem or reduce its life. Connection Audio Connection Connection method of LM-503PA with other audio equipments, take pictures below for your reference: The front stage Suggestions: 1. During installation please always refer to the other equipments operation manual. - Page 6 Connection Speaker Connection Check the impedance of your speakers. Attach the positive (+) side of you speakercable to the 4, 8 or16 Ohm terminal and the negative (-) side to the 0 Ohm terminal. If your speakers are 6 Ohm or otherplease experiment with the 4,8 or 16 Ohm terminal to get the best result from your speakers.
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Page 7: Functions Description
Functions Description Overview from the top Hum Adjustment V2 Hum Adjustment V1 Bias Adjustment V1 V1、845 Power Tube V2、 300B Driver Tube V3、310A Driver Tube V4 Power rectifier V1 Screen flow adjustment method Bias Adjustment/Hum Adjustment: Turn on the amplifer and wait for around ten minutes. Choose and turn the Bias Current selector to ON position. Turn down V1 BIAS ADJ. - Page 8 Functions Description Front Panel: Power Switch Rear Panel: Signal Input Power Socket Fuse Speaker Output...
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Page 9: Turning On
Turning ON 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. Connect to AC 230V～50Hz Note:... -
Page 10: Tube Replacement
Zhuhai Line Magnetic Audio Co., LTD or an authorized Line Magnetic Audio Representative. -
Page 11: Troubleshooting
Signal input cables or speaker Reconnect it as suggested in the manual is not so good cables are wrongly connected Line Magnetic logo is registered trademark of Zhuhai Line Magnetic Audio Co., LTD. Copyright of Zhuhai Line Magnetic Audio Co., LTD. All Rights Reserved.
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