Mutchus

This circuit use IC TDA1004A to main operation .IC is very nice and durable if used properly and correctly, by the way supply the correct voltage , don't supply more voltage than 20 volts, because it can damage the IC. This circuit suitable for subwoofer speakers, but this amplifier  is mono.See schematic and troubleshooting below : If the circuit above not working , posible cause is on : Supply voltage. IC Damaged or installation inverted. Component damaged . Installation components inverted. Line break PCB. Input not connected or input connect to ground. Output speaker not connected.

Basic mosfet amplifier This Basic MOSFET amplifier is very simple to build and low cost. Is perfect for Hi-Fi amplifiers and instrument amplifiers (guitar, keyboards …). Output power is + / – 100 Wrms at 8 ohm load or + / – 160 Wrms below 4 ohms. The simplicity of this circuit cause distortion + / -0.1%. Bandwidth at -3 dB is from 4 Hz to 96 Khz and it is limited by C1, R1, R2 and C2. Transistors T1 and T2 makes a first differential stage, current source of +/- 1 mA is set by R3. P1 allows a fine tuning of DC voltage at amplifier’s output. Place P1 at it’s half value for first power up, then turn it slowly for a lowest DC output voltage. It is recommended to use a first quality component. Input sensitivity is 1.2 volts. The gain of 27x is archived by R7/R6. It may be modified by changing R7 value. Transistors T5 and T6 makes the second differential stage. Transistors T3 and T4 works as a current mirror source. They push the second differential stage to drain equal current. Doing so we ...

The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range start at 16Hz and can reach 100KHz. Make sure you are using good heatsink. The chip supports mute function as well. 50W Hi-Fi amplifier Circuit Diagram A symmetrical 30V power supply is all its need to power the unit. 

The series of amplifiers that are used on the television audio, amplifier used amplifier ICs, including the IC: • AN7523 • AN7522 • TDA2616 Third series of the function with the same system, namely BTL (Bridge Transformer Less). By using such configuration we get several advantages, namely no use coupling capacitors or coupling transformers. Block diagram of circuit in the IC AN7522, AN7523 and TDA2616 as in the image below : Schematic AN7522 AN7523 amplifier schematic Schematic TDA2616

Amplifier circuit using ic STK4065 above that which the amplifier circuit uses only ic, or also could be called this series do not have equality in the use of ic. Power amplifier output power 35Watt supplied with a voltage of 13.5 volts DC. Impedance of the output is 8 ohms. that can be applied to the speaker subwoofer, woofer, and fullrange. Component list : R1 = 2,2R R2 = 2,2R C1 = 1uF C2 = 100uF C3 = 100uF C4 = 220uF C5 = 470uF C6 = 0.47uF C7 = 220uF C8 = 33pF C9 = 220uF C10 = 33pF C11 = 0.47uF U1 = STK4065