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My Stereo integrated hi fi amp is giving a crackle when output from certain devices - like a build up of static at intervals. It is quite old NAD amp - is this a sign of transistor failure, is it worth repairing and how?

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This sounds like you may have a lot of solder connections on the amp board and the power supply board to be resoldered. After a few years of using the unit they can get heat stressed and develop cracks in them. The sooner you get this fixed the better. NAD is a very good brand of stereo and in most cases they are well worth getting fixed. If the stereo is used for too long it can develope some component break downs that would cost much more money to repair.

Sometimes the static or crackle sound is just the volume control or other controls like the balance or teble or bass controls that just need to be cleaned with the proper type of electronic contact cleaner.

I hope this helps, have a nice holiday season,

Dave

Posted on Dec 13, 2008

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