Simple power amplifier 4x50 W

This is the simplest audio amplifier, capable of delivering 50 watts of power to each of the four channels. This adds up to 200 watts of sound power. And this, as it turned out, is not the limit. The microcircuit on which the amplifier is built can provide 80 W per channel into a 2-ohm load.
Nowadays, building a powerful amplifier with your own hands is not difficult. And all this thanks to modern element base.
Today we will talk about a simple amplifier based on the TDA7560 chip, which can easily be made by a person with virtually no knowledge of electronics.

Costs TDA7560 ali express absolutely ridiculous money, about 1 dollar – look here.

Simple power amplifier 4x50 W

The Philips TDA7560 chip is simply a godsend, especially for those who have not encountered it before. It has long been chosen by both beginning radio amateurs and car enthusiasts for its low supply voltage. The TDA7560 chip has a complete, but older analogue - the TDA7388, which is slightly less powerful.

Amplifier Specifications


Output power:
  • At a 4 Ohm load the maximum is 4 x 50 Watt.
  • At a 4 Ohm load the nominal is 4 x 45 Watt.
  • At a load of 2 Ohms the maximum is 4 x 80 Watt.
  • At a load of 2 Ohms the nominal is 4 x 75 Watt.
  • Supply voltage from 8 to 18 Volts.

See other characteristics in datasheet.

Amplifier circuit


Simple power amplifier 4x50 W

The circuit diagram for connecting the microcircuit can always be viewed in datasheet. Everything is simple and obvious: there are four inputs on the left, four outputs for speaker systems on the right. Naturally, the inputs can be connected to each other, but not the outputs. Each output of the microcircuit must be loaded onto its own speaker system.
With this, I think, there will be no questions. The only thing worth explaining is the output of “ST-BY” and “MUTE”. “ST-BY” is a standby mode, usually it is immediately connected to the power supply plus and the amplifier is always active. "MUTE". - this is the muted mode, usually it is also connected to the power supply plus and the amplifier always becomes active. There are jumpers on the board for this purpose.

Amplifier board


Simple power amplifier 4x50 W

Boards can be made into regular LUT for a few tens of minutes. You can download it here:
tda7560.zip [7.32 Kb] (downloads: 5779)

After soldering and assembling the amplifier, do not forget to install the microcircuit on a radiator, preferably a large one if you are a music lover who loves volume.
Simple power amplifier 4x50 W

Amplifier Application


The microcircuit was originally developed for use as an audio power amplifier in car radios. Therefore, using this amplifier in a car is an excellent choice. But keep in mind that it is advisable to use thick power wires. It may also be necessary to significantly increase the capacity of the power filter capacitors.
The amplifier on a chip is also great for home use. You can power it from an old computer power supply, as I did in my time. And using a cooling radiator with a fan will significantly reduce its size.
I think there is nothing complicated here, but if someone doesn’t understand something, I’m waiting for your questions in the comments. Thanks to all!
Simple power amplifier 4x50 W

Watch the amplifier test video


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Comments (16)
  1. Alexander.
    #1 Alexander. Guests 16 January 2018 13:57
    4
    And if I need two channels of 50 each for the speakers, and the other two for the subwoofer, which contacts on the microphone should I connect???
  2. Guest Evgeniy
    #2 Guest Evgeniy Guests 18 January 2018 13:15
    4
    There won't be any 50W there even at peak. This micra is a typical "magnetic" one. That is, to be honest, it will give a maximum of 10-15 watts. But it sounds good, it’s not expensive, and it’s extremely easy to assemble (you can even assemble it with a wall-mounted installation, without a board). So I recommend it! Just don’t expect it to actually deliver 50W)
  3. ANDREY ALEXANDROVICH
    #3 ANDREY ALEXANDROVICH Guests 18 January 2018 18:59
    2
    Well, if anyone looked at the datasheet for this microcosm, you can definitely say - it’s crap! It’s not worth the candle, for the price and quality it will be appropriate. And about power: the indicated power will be at 10% distortion!!!!
    1. Valya
      #4 Valya Guests 18 January 2018 19:12
      6
      well, let 50 be 10%, well, 45 is almost pure!!! don't drive me away - it's a crap thing!
    2. Grigory Arkadyevich Rogozhnikov
      #5 Grigory Arkadyevich Rogozhnikov Guests January 27, 2018 11:39
      3
      In a car, 10% and 20% of non-linears are not important, but it can easily swing, especially if you don’t make a bridge, but load each channel with its own load, IMHO, it will be useful
      add a P-filter and Conder for power supply in the amount of 20-30 thousand and go...
  4. Alexei
    #6 Alexei Guests 20 January 2018 20:57
    5
    we count. Let the power supply be 12V, the linearity of the output transistors is up to approximately 10V. The amplifier is a bridge circuit, we have 10V peak. The effective voltage will be 7.14 - which means at 4 ohm load there will be 13.75 W. There won’t be any 50W here. When powered from 18V it will already be 28W
    1. VALENTINE
      #7 VALENTINE Guests 21 January 2018 15:10
      5
      YOU CAN'T COUNT! Vasya, are you driving? There is a different formula for calculating sound power! This is no place for you! Read the datasheet, the manufacturer won’t lie! Mikruha 40 W pumps without problems.
      1. Guest Vitaly
        #8 Guest Vitaly Guests 24 February 2019 22:13
        5
        Which manufacturer??? Do not make me laugh! The elementary laws of physics do not work with a 12V power supply. overclock the amplifier to 50W.
  5. Sasha
    #9 Sasha Guests January 21, 2018 09:44
    2
    It’s easier to immediately buy an amplifier based on this chip. The selection is quite wide and the price is decent.
  6. Gevorg
    #10 Gevorg Guests 23 January 2018 14:29
    3
    Hi, friend. Can you write the dimensions of the printed circuit board? Do you need to mirror the signet?
  7. Prom
    #11 Prom Guests 5 May 2018 20:14
    2
    How to change output frequencies? Sobral plays decently at highs, almost non-existent at lows.
  8. Denis
    #12 Denis Guests 29 July 2018 16:51
    2
    where is the list of elements?
  9. vit
    #13 vit Guests 20 October 2018 04:26
    2
    somehow it’s not clear! in the diagram there are two resistors assembled, the photo is much larger laughing
  10. Vlad
    #14 Vlad Guests 8 July 2019 23:21
    2
    I assembled it on it. Our analogue UN19, before the cutoff of the sine wave, delivers about 16W (nominal) when powered by +/-15, the TDA2030A delivers its declared 18-19W nominal. With distortion of about 4-5%, its power is 22W. There are no 40, or even 50 W, even close.
    1. Guest
      #15 Guest Guests 12 July 2022 06:14
      0
      The fact that you soldered this from a young radio amateur’s circle, this microcircuit has 4 channels with field-effect transistors assembled into a bridge, these microcircuits were not even close, never.