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This amplifier circuit has a power output of a small or too low at 5.8 Watt, which uses IC KA2205. The required voltage for at least 6 volts to 18 volts DC maximum. Schematics power audio amplifier with IC KA2205 Component List C1 = 1uF C2 = 100uF C3 = 47uF C4 = 1000uF C5 = 0.1uF C6 = 220uF IC1 = KA2205

One type of regulator of tone / tone controls are the Audio Graphic Equalizer. Audio Graphic Equalizer have 2 kinds in my opinion. Namely Audio Graphic Equalizer Bar and the type of parametric type is often called parametric equalizer. Audio Graphic Equalizer In the article this is the type of bar with 5 channels using IC LA3600. IC LA3600 is a single chip "Audio Graphic Equalizer 5 channel" that is designed specifically for the equalizer five channels. Because IC LA3600 is a special design of the equalizer circuit to make this a simple equalizer. Figure series of Audio Graphic Equalizer 5 channels with IC LA3600 as follows. Equalizer Schematic Audio Graphic Equalizer circuit with IC LA3600 above can control the audio frequencies from 108 Hz to 10.8 KHz. Audio frequency which is controlled by this equalizer was 108 HZ, 343 Hz, 1.08 KHz, 3.43 KHz and 10.8 KHz. The frequency of that frequency is set based on the value of 2 pieces of capacitors in each chanelnya. So for instance...

Skema Rangkaian Circuit combination of the 3 IC TDA2822  above can be used for 5.1 audio power amplifier system with low power output . The input signal used is analog signal not digital (SPDIF) , so it needed some input to the jack input. The speakers are suitable for use have impedance 8 Ohms , and with power 4 Watt, to Left , Right , Rear pair , center , and subwoofer speakers. To run this circuit , is also required circuit for volume control as tone control. Component and technical Information : C1-C6 : 220uF/25V C7-C9 : 47uF/16 V IC       : TDA2822 x3 CON-1: VCC +12volts DC CON-2: Ground CON-3: Left Speaker CON-4: Right Speaker CON-5: Rear Speaker CON-6: Rear Speaker CON-7: Center Speaker CON-8: Subwoofer Speaker X1-1:Ground X1-2:Subwoofer Input X1-3:Center Input X1-4:Rear Input X1-5:Rear Input X1-6:Right Input X1-7:Left Input See this Printed circuit board below: circuit and PCB Design use Cadsoft Eagle Software

The switching regulator power supply used LM2575-5.0 on this schematic. You can make the stable voltage by using the 3 terminal regulator like LM317. However, because the output electric current and the inputted electric current are the same approximately, the difference between the input electric power (The input voltage x The input electric current) and the output power (The output voltage x The output current) is consumed as the heat with the regulator. Because it is, the efficiency isn�t good. Data sheet for LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator http://www.national.com/pf/LM/LM2575.htm

The above is a simple amplifier circuit also has a minimal power output. By using only a few components and a single IC as the basis for the strengthening of the amplifier, this circuit has a power output of not more than 2.5 W and impedance or RL 8. Requires a minimum voltage of this amplifier is around 6V and 26V maximum voltage, the voltage must be DC or already rectified and filtered. Part List : R1 = 1R C1 = 0.1uF C2 = 100uF C3 = 0.1uF C4 = 5uF C5 = 500uF C6 = 0.1uF IC = ULN2280B , ULN2281B , ULN3784B.