• Item: Chip amplifier  
  • Type: retro-thermionic "Overture"  
  • Posted: 23 March 2019  
  • Builder: mwhouston  
  • Country: Australia  
  • Comments: 0  

LM4780 Audio Sector chip amp

Built two Audio Sector LM4780 based amp modules. Each module is a stereo amp. They can be bridged and paralleled. On a request I finally put these compact modules into a finished amp. The enclosure is a 2U 19" rack mount which gave me plenty of space to work. The buyer was happy to spend money on better parts. These included Panasonic caps on the board, 2X 22000uf Mundorf MLytic audio grade filter caps. copper, palladium and Teflon RCAs and extra heavy duty speaker posts.

The signal wiring was with fine silver plated copper wire and heavier wiring is twisted pairs of solid core cat5. All caps are snubbed and the amps is absolutely dead quiet. Should produce near 60Wpc.

Excellent sounding amp and well worth employing these compact "Overture" modules


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