150W Car Audio Amplifier

150W Car Audio Amplifier
This is the circuit design of 150W car audio amplifier. The circuit is divided in two block diagrams: The tone control circuit and power amplifier circuit. Tone Control for 150W Car Audio Amplifier The tone control circuit build based on IC LF353 In stereo mode, we shall have the action of eight loudspeakers which are going to create a very important sound pressure. Tone Control Scheme (more…)

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

Quad amplifier 40W

Quad amplifier 40W
This circuit provides a total of four speakers 4 ohms and 40W at 12v powered. It is therefore ideal for use in the car. Total harmonic distortion is rather high, about 10% at full power. But with half the power requirements (20W) is less than 2%. Anyway it is not intended to have a high performance system in the car. (more…)

Two way 20 watts audio amplifier

Two way 20 watts audio amplifier
This is a 20 watts audio amplifier is supplied with a voltage 14.4 volts, giving a total power of 20 watts into two different channels, each of which is connected to the tweeter and a woofer. This amplifier is therefore equipped with an active CROSSOVER  filter with a crossover frequency of 2 KHz. Each loudspeaker must support a power of 10 watts and have an impedance of 4 ohms. (more…)