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By organizing the annual CES 2010, Pass Laboratories has recently introduced a new device that is X260.5 mono-block power amplifiers. X260.5 offers a power output of 260W and comes with the Super-Symmetry topology features that can improve performance by adjusting the characteristic value of balancing and damping amplifier distortion / interference. X260.5 device brings all the sonic advantages of mono-block operation for A / B high-power amplifiers in a physical package that can be managed device is half the physical size and weight of the device X600.5 Class D mono-block power. Simple physical size, weight that can be managed and high strength coupled with great performance make this device as the Pass Laboratories ideal power-amp in any system that refers to a 2-channel and multi-channel format. In addition, it also brings flexibility X260.5 combination for consumers who already have a device Pass Laboratories Stereo amp and want to add an additional channel power amplifier that is ...

Overview: The AN7510/7520 series is a 0.5W to 3W BTL audio power amplifier IC. Equipped with a standby function and mute or DC  volume circuit, the series includes a lineup of single and dual output models. With simplified set design due to minimum  external components, this IC has a wide variety of applications. Features: Operating power sourcs voltage: 3.0V to 13.5V. Built-in standby function. Built-in mute or DC volume circuit. Circuit Diagram:  0.5W to 3W BTL audio power amplifier IC

This circuit use IC TDA1016 , minimum require voltage for this circuit 3 volt and maximum require voltage 15 volt .Its mono 5 Watt power output with impedance 4 Ohm , Current required 14 mA. In order for this circuit work optimally , the voltage should be at least 9 volts and the speakers should be higher 4 Ohm or equivalent, and use the speaker woofer. See Amplifier circuit schematic below :

The electronic devices are very sensitive to the fluctuations in the power fed to them. This problem can be solved by using regulated power supply for them. This power supply circuit is equipped with an adjustable voltage regulator to adjust the output in accordance with the requirement. Adjustable voltage regulators have both line and load regulation which is better than standard fixed regulators. The stepped down AC from the secondary winding of the transformer is fed to the bridge rectifier for rectification. The output has pulsating DC which is filtered by a capacitor C1 (1000uF). This output needs to be stabilized against the input variations by using a voltage regulator IC (LM317) in series with the bridge rectifier. This regulator not only guarantees stable output but can also be adjusted to obtain a desired level of voltage output. The output from the regulator can be varied from 1.2V to 25V. This is achieved by adjusting the value of variable resistor (preset) VR1 (5k). A f...

Here are two transistors manufactured by Toshiba. 2SC5200 and 2SA1943 transistor pair has been widely applied or used in the amplifier power amplifier because the transistor has a large power, and also not too expensive than other large power transistors. This transistor has the advantage of High breakdown voltage: VCEO = 230 V (min), Suitable for use in 100-W high fidelity audio amplifier's output stage. For more information, please see datasheet below. Maximum Ratings (Tc = 25°C) Electrical Characteristics (Tc = 25°C)

These amplifiers using IC KA2202 and KA2207, which has a power output of 2.3 Watt berimpedansi 4 ohms. Minimum supply voltage and maximum 5Volt 20Volt. See schematics and component list below. Part List  R1 = 100K R2 = 56R R3 = 56R R4 = 1R Use 1/4 Watt resistor C1 = 100uF C2 = 100uF C4 = 100uF C5 = 470uF C6 = 100nF C7 = 470pF C8 = 2,2nF C9 = 100uF U1 = KA2202 , KA2207