The filter circuit of this main circuit will sent to through to the signal that middle frequency. At the same time is attenuated the others frequency into input signal to…
This is a 4 transistor audio amplifier circuit. Which is a 4-transistors complementary push-pull amplifier, that shows the basics of audio amplifier design.
This is three Simple 50w OTL audio amplifier circuit by 2N3055, can build easy and cheap, It's durable and very loud sound , Not needed speaker Protection. [...]
This is First stereo tone control board for a electronic students, so small,easy to build all in one PCB ,cheap. use transistors, few parts so low noise [...]
This is simple intercom circuit using transistor,so easy to build and cheaper than ICs, perfect for a small home, and to use basic or demonstration projects
This is a bass booster circuit that use transistors as base. It is designed to increase a low frequency of audio on cheaper than ICs or normally circuit.
The integrated amplifier that is smaller. For listening in a small room. Must have good the sound quality. Low noise and cheap.