Archive | January 2013

NAD 214 poweramp refurbishment

Being an audio enthusiast, a proper power amp can be a thing of beauty. Big toroidal transformers, capacitor banks and relatively easy to understand symmetrical layout. A friend of mine donated his NAD 214 after upgrading to a 200 watt, THX certified, Parasound poweramp.

The NAD wasn’t without fault. It sporadically started producing some noise and hiss. A bit of googling showed some common issues with the 214 (and his bigger brother, the 216). Issues that could be the cause of the noise:

  • Bad solder jointsNAD1
  • Oxidized print connectors
  • Fried speaker relay
  • Undersized/ dried up main PSU capacitors
  • Offset idle current

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