Velleman K4001 Mono Audio Amplifier, 7 W, Multi-Colour;

This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit protected. Includes heatsink.
Specifications:
• Music power output: 7W / 4ohm
• RMS output: 3.5W / 4ohm or 2W / 8ohm
• Total harmonic distortion: 0.05% (1W / 1kHz)
• Frequency response: 20Hz to 20kHz (-3dB)
• Signal/noise ratio: 86dB (A weighted)
• Input sensitivity: 40mV / 150Kohm
• Overload and short-circuit protected
• Supply voltage: 15V DC (8 to 18V DC possible) / 0.5A
• Dimensions: 2.2 x 1.4"