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7W Mono Audio Amplifier Kit - K4001

by Velleman

7w mono audio amplifier kit

This small 7W Mono Audio Amplifier Kit is constructed around the TDA2003 power audio IC and delivers 7 watts of music power into a 4 ohms load.

The RMS power is 3.5 watts into 4 ohms or 2 watts into 8 ohms with a THD of 0.05% at 1W, 1 kHz. The signal/noise ratio is 86dB; the frequency response is 20Hz-20KHz at -3dB. The input sensitivity is 40mV/150Kohm.

The IC is thermal overload and short circuit protected. Requires a 8-18V, 0.5A - separately sold - power supply.

The kit's instructions are easy to follow. All you need is a soldering iron, solder and you can start building.

Parts list:

  • R1: 470 ohm resistor
  • R2: 4.7 ohm resistor
  • R3: 100 ohm resistor
  • R4: 1 ohm metal film resistor
  • C1: 8n2 capacitor
  • C2: 100nF capacitor
  • C3: 100nF capacitor
  • C4: 10uF electrolytic capacitor
  • C5: 470uF electrolytic capacitor
  • C6, C7: 1000uF electrolytic capacitors
  • IC1: TDA2003 Audio amp IC
  • Heatsink
  • PCB tabs
  • printed circuit board

Schematic diagram (GIF)

More power audio amplifier schematics with:
TDA2040, TDA1013B, TDA2005 and LM386.