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50 Watt Amplifier Module Kit

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$37.89 (inc GST) $34.45 (exc GST)
Ships in 7 to 10 bus. days

Product Description

Originally detailed in Silicon Chip magazine, March 1994 issue. All instructions included with this kit. 

This 50 watt unit uses a single chip module and provides 50 watts RMS into 8 ohms with very low distortion and extreme quietness.
- PC Board size only 84 x 58mm.

Kit is supplied in short form version. PC Board and electronic components only supplied. Heatsink Optional


  • Output power: 50WRMS continuous into 8ohms
  • Power supply: +/- 37.5VDC
  • Signal/Noise ratio: -114dB (A-weighted) -106dB (20-20kHz)
  • Distortion: 0.002% at 40W 1kHz
  • IHF power output: 60W @ 1kHz
  • Power supply not included.

Power Requirements:

  • +/-35VDC rails @ 80VA per module
  • MT2114 25 + 25V 160VA toroid x 1
  • ZR1314 Bridge rectifier x 1
  • RE6241 2,200/50V electro caps x 2

Note: The LM3876 used in this design has been changed to severely limit its power output into 4 Ohm loads. If you want to use a 4 Ohm load, the solution is to use the LM3886 which can deliver over 60W. However the supply rails should be reduced to +/- 28V, as recommended in the article for the LM3876 when using 4 Ohms loads

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