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Pre-Amp circuit. Welcome back to the electronic circuit, we now have microphone with amplifier number of transistor BC549, BC547 for the drive signal.
Since this is a simple microphone preamplifier circuit between the microphone and stereo amplifier can be used. The pre-amplifier circuit of the microphone can be a normal stereo amplifier line / CD / [...]

Circuit Power Amplifier has a power output of up to 1500W RMS, power amplifier circuit is often used to power sound systems needed to outdor. In a series of images can be seen the final power amplifier uses 10 sets of large power transistors for the ending. This power amplifier circuit using a transistor amplifier [...]

The CD / VCD player who uses the same listen to the audio quality is often poor. This is due to the IC Acting analog amplifiers. Most commonly used is the IC op amp.Cheap. Is a valuable slew rate low. It can not meet the immediate modification of the digital signal. The frequency response is [...]