This Subwoofer Amplifier using IC TDA2030 as a driver power amplifier and adding transistor booster using Transistor TIP3055 and TIP2955 1 Set. Output Power Amplifier about 200 Watt at voltage supply 30VDC. Preamp subwoofer filter using IC LM358 as an om-amp to processing and filtering subwoofer low frequency to deliver for power amplifier. See the circuit schematic below.
Circuit power amplifiers directly above combined with a subwoofer filter lm458, so that the low frequency output power.
In the block diagram of the amplifier are 1 pieces of IC TDA2030, which speaker output on pin 4 is used to drive TIP booster transistor, so that the power output greater power amplifier. However, use of these transistors can add distortion to the amplifier circuit.
Use the power amplifier supply voltage is approximately 15V - 30V DC. to use the subwoofer speaker can use a 12 inch speaker with an impedance of 4-8 Ohm 250W.