Circuit Amplifier 2w
The
amplifier is designed for independent in a small speaker box. Can support to Walkman, Mini-Disc and CD players, computers, and similar devices with line or headphone output. Of course, in many cases, you will need to create two units for stereo.
In use, R9 should be carefully adjusted to provide minimum signal for audible distortion consistent cross-over with minimal quiescent current consumption measurement, a good compromise is to set the quiescent current at about 10-15 mA.
The
circuit is intentionally designed using old type transistor, it is to get the harmonic distortion and to avoid the difficulty of finding good components. This 2 watt Amplifier (s) can be easily supplied by plug-in wall transformer 12V. Closing SW1 bass boost is provided but, at the same time, volume control must be increased to compensate for the loss of power at higher frequencies.