260W Power Audio Amplifier

260W Power Audio Amplifier
This the circuit diagram of 260W power audio amplifier capable of delivering up to 260W RMS at 8 Ohms load. The signal level of 1 VPP standard amplitude is input to a differential stage composed of BC556C Transistor. Then the signal is input to the post-formed by complementary transistors in order to achieve the desired power. (more…)

1 Watt Stereo Audio Amplifier based IC KA2209

1 Watt Stereo Audio Amplifier based IC KA2209
Above schematic diagram is 1 Watt stereo audio amplifier based IC KA2209 can be used for small electronic device such as radio, smartphone, tablets or other gadgets which require little sound amplification :D This is the text book circuit for this IC in stereo mode. It is ideal for battery powered operation. Power output depends critically on speaker resistance & supply voltage. At 3V into 4 ohm speakers the power is 0.1W. At 6V into 4 ohm speakers it

Car Subwoofer Amplifier with STK IC

Car Subwoofer Amplifier with STK IC
This is a commonly used audio power amplifier can be used as car subwoofer amplifier since this circuit uses asymmetrical power supply to work. 24V lead acid battery (car accumulator) should be great for this subwoofer amplifier. Simple design, low cost and easy to build are the advantages of this amplifier circuit which capable to deliver about 20W power audio output, or course it's enough for the "room" of cars. Take a note that heatsink is required to prevent

1000W Power Audio Amplifier

1000W Power Audio Amplifier
This is 1000W power amplifier circuit built using many power transistors. The following scheme diagram is used for single/mono channel only, you may build two same circuit for stereo audio system. Circuit Diagram: The power supply needed for this circuit should be 10A minimum single channel and 20A for stereo channel. It uses symmetrical power supply (dual polarity) with recommended voltage is 63V. (more…)