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Question
I have a pair of Acoustic Research Powered Partner speakers. They are about 20 years old. These are powered speakers that plug directly into a wall outlet. One of them sound fine, but the other has a loud hum. I have tried changing the plug wires and tried different outlets but it has not helped. Can you help? Thanks
The hum is coming from the amp inside and probably the power supply section. Probably needs new electrolytic caps which require soldering and replacing the old ones with generic new ones. It is not a home DIY project unless you are electronically gifted/experienced. Otherwise leave it for a professional.
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Answers by Expert:
Cleggsan
Expertise
Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.
Experience
Have been associated with audio design, standards, testing and component systems for over 40 years.
Organizations
Life Fellow Member of Audio Engineering Society
Life Senior Member of Institute of Electronic and Electrical Engineers
Publications
Review technical manuscripts for IEEE Spectrum
Write occasionally for high-end audio publications
Education/Credentials
BSEE/MSCS/MBA
Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers
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