25W Mosfet audio amplifier

Posted on Feb 12, 2013

Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need. Output power: well in excess of 25Watt RMS @ 8 Ohm (1KHz sinewave) Sensitivity: 200mV input for 25W output Frequency response: 30Hz to 20KHz -1dB

25W Mosfet audio amplifier
Click here to download the full size of the above Circuit.

Q6 & Q7 must have a small U-shaped heatsink. Q8 & Q9 must be mounted on heatsink. Adjust R11 to set quiescent current at 100mA (best measured with an Avo-meter in series with Q8 Drain) with no input signal. A correct grounding is very important to elim

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    High quality FM transmitter
    Regenerative receiver for AM band
    atmel driving LEDs directly from microcontroller pins
    Microphone Circuit Test Oscillator
    LM1893 for Power Line Modem Circuit
    model railway short circuit
    Canary chirp generator
    Mini audio amplifier circuit
    Low cost temperature data logger using PIC
    I2C PIC Interfacing Tutorial Circuit
    Traffic intersection light automatic controller circuit
    Ultrasonic insect repellent circuit