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400Watt IRFP448 Power Amplifier

Power amp 400W IRFP448 Circuit
Amplifier circuit these days,We would like to musical you pro the MOSFET 400 watt amplifier is amplifier on my kW shares the same circuit and main PCB design. The barely real difference is the figure of output procedure to the device. We encompass using The IRFP448 design while the MOSFET amplifier 14 O / P procedure. These amplifiers can live used used for almost a few effort with the aim of requires in height performance, low apply din, distortion and brilliant sound quality. Examples would be subwoofer amplifier be supposed to FOH stage Amplifiers, surround a inland waterway a very powerful sound amplifier, et cetera. The 400W MOSFET-amplifier has four tone stages of amplification. We are looking to start several   stage appropriate list.

400Watt IRFP448 Power Amplifier
400Watt IRFP448 Power Amplifier Circuit Diagram


The bias and bumper stage
in the role of the entitle suggests All Q ,C and ZD the Bias and buffer phases. Its major goal is to provide a firm MOSFET Gates  and offset voltage and the voltage memory amplifier stage of the extraordinary Resource scope. pardon? would engage in devoid of the period response and the effect Slew rate is indeed very bad. The flip part of the coin is not the spare step Introduction of an bonus dominant pole trendy the amplifier opinion disk.

Power amp 400W IRFP448 PCB and  the electronic components layout thus as below :

PCB layout design
PCB layout design

Component Placement
Component Placement

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2 Responses to "400Watt IRFP448 Power Amplifier"

  1. UnknownAugust 12, 2015 at 9:23 PM

    WHAT ABOUT THE VALUES OF D5 & D6 AND THE uH OF L1?IF WE ADD TWO MORE IRFP 448 ON BOTH SIDES WILL THE VALUE OF L1 REMAINS UNCHANGED AS HIGHER OUTPUT NEEDS MORE uH AND ADD TWO RESISTANCE OF 1 OHMS 5WATTS IN PARALLEL TO THE SPEAKER AS SHUNT.PLEASE BE COURTEOUS TO REPLY AS IRFP 448 IS NEARLY LATEST HEXFET TRANSISTOR WITH 180WATTS OUTPUT CAPACITY AND I AM VERY MUCH INTERESTED IN IT.BESIDES 2S A1494 OR 2SC 5200.

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  2. UnknownApril 2, 2020 at 7:34 AM

    This amp is really good! Thanks to the owner. The diagram has errors but by learning, it works. Actually I assembled 4 units all in mono mode. Because in stereo the sound output is motorboating...what is the solution? Does the grounding a problem?

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