Circuit Power audio Amplifier with TDA2030 2.1 – 3 x 18 Watts

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This circuit is a complete application is 2.1 amp, two satellite speakers for TDA2030 and one for the subwoofer, the 2.1 system, widely used in commercial applications as an amplifier for computers, which may give an increased in its audio system with a stereo amplifier + bass amplifier (subwoofer).

Description of the amplifier circuit with TDA 2030

The circuit is divided into 3 parts: power supply, amplifier, stereo amplifier and bass amplifier (subwoofer).

Power supply circuit  and pre + low pass filter for the sub power supply

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The power supply is of symmetric type, using a transformer, 110 or 220 with dual secondary 12 volts and 3A current. I recommend using a fuse and a switch before the transformer. B1 is a bridge rectifier least 100 volts / 4 A, an example that can be used is GBU606, the filtering circuit is formed of the capacitors C1, C2, C3 and C4, the electrolytes can have values from 4700μF . The power supply for the op amp Highpass filter, is used three terminal integrated circuits 7812 and 7912.

Circuit of the amplifiers of satellite speakers

The left and right channels give exactly the same, let’s see how the left channel: LIN is the audio input jack, which is coupled by C20 to the pot volume adjustment, it is a double pot, and set the two channels simultaneously. R19/C22, helps to improve the signal of the treble. The capacitor C21 couples the signal to CI6 TDA2030, after amplified audio output is pin 4 of integrated. The resistor R7 and R9 are responsible for feedback, so by changing the value of R7 can increase or decrease the gain of the amplifier. R20 and C23 form the compensation network for the speakers.

Circuit pre and Amplifier Subwoofer

The signal comes from the subwoofer to the left and right channels by resistors R15 and R10 being decoupled by capacitor C12, is applied in the operational amplifier 1 IC4A NE5532, which forms a pre-amplifier to boost the signal by 6 times. Determined by R6/R8 resistor.

The components C9, C10 and R10 form a low pass filter in this case is calculated to 200Hz. After leaving IC4B the low frequency audio through the potentiometer P1 that makes the volume level, then forwarded to IC3 is what makes the subwoofer amplifier, the operating principle is the same as satellite amplifiers.

TDA2030 2.1  – Schematic of the power amplifier  – Click to enlarge the diagram

Circuit Power Audio Amplifier With Tda2030 2.1 Chanell - 3 X 18 Watts - Subwoofer - Complete With Pcb Suggestion And Power SupplySuggested PCB for the circuit of the amplifier 2.1 or 2 +1

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Amplifier With Tda2030 2.1 Pcb Silk

Part List for assembly of power audio amplifier for 2.1 – TDA 2030

Part Value / Description
Resistors 1/4 W 5%
R1, R14, R20 10 – Brown, Black, Brown, Gold
R2 22k – Red, Red, Orange, Gold
R3, R5, R10, R11, R15, R19 10k – Brown, black, Orange, Gold
R4, R8, R9, R16 470 – Yellow, Violet, Brown, Gold
R6, R12, R17 33k – Orange, Orange, Orange, Gold
R7, R13, R18 4.7k – Yellow, Violet, Red, Gold
P1 10k – Potentiometer  – Volume Adjust Bass amplifier*
P2 10k – Double Potentiometer General volume*
C1,C2, C7, C10, C14, C15, C17, C21, C23 100nF – 104 – Polyester Capacitor
C3, C4 4700µF/35v – Electrolytic Capacitor
C5, C6, C8, C12, C13, C18, C19, C20 10µF/25v –Electrolytic Capacitor
C9 220n – 220n, 0.22, 224 – Polyester Capacitor
C11 47µF/25v – Electrolytic Capacitor
C16, C22 2n2 – 222, 2n2, 2200 – Polyester or ceramic Capacitor
IC3, IC5, IC6 TDA2030A – IC power audio amplifier
IC4 NE5532N – Double Op Amp
IC1 7912 -Integrated Circuit Negative Voltage Regulator – 12V
IC2 7812 –Integrated Circuit Positive Voltage Regulator +12 v
B1 Bridge rectifier100V 4 A Ex:GBU606
Connectors and functions
L-IN Connector 2 terminals audio input left channel
L-OUT Connector 2 terminal audio output left channel
R-IN Connector 2 terminal audio input left channel
R-OUT Connector 2 terminal audio output right channel
SUB Connector 2 terminal audio output Subwoofer
AC Three-pin connector for the transformer
J1, J4, J5, J6, J7 J12MM – Bit of wire
J2 J5MM – Bit of wire
J3 J7MM – Bit of wire
Transformer 12 +12 / 3 amps, wires, box for the amplifier PCB, heat sink for the IC TDA, etc..

Appearance of some components used in this assembly TDA2030, NE5532, 7812, 7912

Appearance Of Some Components Used In This Assembly Tda2030, Ne5532, 7812, 7912

Download PCB files in PDF: TDA2030 datasheet, NE5532 datasheet , Schematic of the amplifier 2.1, PCI board, component side, Silk Screen. Just remember that whoever Libraries (library) for the TDA2030 and NE5532 for the Eagle, these components are linear in the library.

Download PDF    Mirror

Buy diy kit TDa2030 2.1 in Aliexpress


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161 thoughts on “Circuit Power audio Amplifier with TDA2030 2.1 – 3 x 18 Watts”

  1. Hi tony,

    You are using 12v 3a power supply. But but regulating it with 7812 gives output of max 1A. So is it of to use 12v 1A power?

  2. hi bang toni, I am grateful from Indonesia

    I want to ask you. how to do your 2.1 circuit so that the satellite RL becomes a midel sound and loud sound? and in the subwoofer, let alone what components need to be changed?

    so and thank you, the answer is wait bang

  3. Hi tony , Greeting from India.
    Taking reference from this circuit i have designed my own Circuit. the Only change is that i used different IC for Subwoofer Channel.
    I am having a problem , the problem is that the Subwoofer channel is making Scratch / Clipping Noises while playing . I think the problem is in Low pass Filter because when i fed the Normal Signal to Subwoofer channel it Works Smoothly.

    kindly help me here … Please Mention a way to personally contact you.

  4. Can you please explain the calculation of each component and output voltage ?explain the design process of this speaker system.

  5. Hello Mr.Toni I cannot able to download the PDF file. Kindly send me a copy to my mail ID: [email protected]. How much Watts speakers and woofer must be used for this circuit? Which online website that I can able to buy all these components?

  6. Hi TONI hope you are fine.I want to ask two things,first one is that i have 10W woofer speaker and 6W tweeters.Can these speakers make nice sound and bass.And secondly SILK file which you have zipped has no equal layout size with that of pcb,Can you send the silk file equally in size with that of PCB.Also Can 2A 12-0-12 transformer power this circuit.Waiting for your quick reply,Thanks

  7. Hi sir,
    I have done this circuit and it works well.
    I have been running the board over 6 months , without any problem .
    With use of at least 2 to 3 amps of power supply you can obtain undistorted and noise free output .

  8. Hello Mr.Toni !
    Can you pls design an 2.1Ch audio amplifier using TDA7388 & NE5532 ICs ? I am newbee & want to design my own car amplifier. I already ordered these two IC from aliexpress.

  9. I have 2.1 home theater which is also known as 2030 home theater. Can anyone send me the simple wiring diagram? It has 4 ic on one side and one on the other side. I can send the pic just provide the diagram.

  10. Sir i want to use tda 2050 ic instead of tda 2030 for more output , can i use it ? If yes please tell me transformer vol. and Amp.


  12. Hi Toni, With the circuit for 2.1 3x18watt using TDA2030. Can TDA2050 be used in place of TDA2030 in this circuit. Thank You.

  13. Any kind person who can explain the whole circuit? From the AC Transformer to the output speakers. Thanksssss. And also, does 3 x 18W means the total output power is 54W? Am I right? Where is V+ and V- is connected in the amplifier circuit? And explain that VDD and VSS. Sorry for my lot of questions. Thanks in advance! 😀

  14. I have tried to build this amplifier but it produce distorted sounds, not clear sound… I don’t know why?

    I already double check all the possible error… but i found none… i followed the layout etc. everything

    Is there anyone who can help fix…..

  15. hi,
    my name is ajay, ouer intex 2.1 multimedia home tether, use tda 2030a ic , sub sound is very low iam change the ic but sound not working properly, what well take designee, please help me

  16. with what i had experienced, this circuit works well with max supply of 12.5-0-12.5, it can be 3-5amps.. 9-0-9 trans also works fine but with lower power output… higher than 12.5 VAC will blow the semicons.. for speakers, 4ohms are more desirable for a more powerful output…






    • if u used 3amps, 4700 cap will be ok but if you used 5 amps, then u need two 4700caps in parallel in each side of the supply

  19. Hello!
    I want to know that Can I use 12-0-12 5 A transformer in place of 12-0-12 3A Transformer ? And what are the maximum output watts of this circuit ?
    Can I use 40 watt subwoofer with two satellite speakers of 10 Watt each.
    Mail me at [email protected]

  20. HLO every one i made it ? tell me how watt/ohm for subwoofer and how what / ohm for sattlite speaker required ? 2>>>>>>>>>>>>> if i have give 19 volt and 3amps is there any effect on circuit ? plz reply me

  21. Please I have been searching for a circuit like this for many days! I have a Simmetric Transformer of 3 AMP how it will work!?

  22. Hello everyone ,
    I want to make this circuit and i have added all the components to my cart.
    Can anyone please tell me about the performance of the circuit ?
    I also want to know the PCB size ? Which transformer and subwoofer will work well ? What to do if noise creates problems?
    Please email me all the answers on…

    [email protected]

    with regards

  23. I’ve been building your 2.1 where two tda 2030 are bridged to give out more output . im feeding +9v and -9v . and I’m also getting 9vdc on da every speaker output. . help me pls. Iam using a ups transformer to power da circuit

  24. Hi, I want to rebuild my burned out by overload Overtech SG-164 because this schematic is soo similar, but the original device uses TDA2050 and goes ok. Other things are different but not relevant. I Strongly Recomend put the amplifier in Another Box, Not into the Subwoofer! Commercials devices comes this way, and it’s like expose the components to an earthquake 9 in Richter scale, nothing can survive this, I had to resold the power condensers! But the main problem in this schem is the OverHeat! I have good disipation, putted a cooler but it wasn’t enough. The transfomer values in the Overtech: 15V x 2 ~ 1.7A (I think aren’t enough, the transformer and the whole power supply must give more current otherwise it will be overloaded, overheated and get Burned! As well said other guy up before) I’ll try to assemble it, even I don’t like to make printed circuits from PCB’s at all. Left pics of my trafo, circuit up and down burn stain. Thanks Toni for this superb job, I’m Electronics Technician from high school and I saw a schem as well as you have described this really few times. Regards from Argentina!

  25. i made it its working but some change is need. 1. i used 470 ohm resistance in place of regulator ic.2. op amp circuit is very bad and need to change.

  26. Hey guys , The circuit is good but there are a lots of noise issues in this circuit…
    If any one want a complete guidance regarding this circuit then contact me on my mail id
    [email protected]
    i have a complete tutorial on a wide range of audio circuits.

  27. hi, there is so much comment on this circuit but i decide to make this amplifier.i will tell you everything about this circuit.

  28. To those having problems with the subwoofer(bass volume) replace c16 and c22 with polyester w/ same rating… it worked for me.

  29. I am getting heaps of noise, tryed adding a preamp amp no help. There is noise in both the left and right. The noise in the sub clears up after increasing its volume a bit. I need this to work for my major project. Which is essential for my hsc and getting into university. if anyone has any idea why its not working please email me [email protected]. please help me

  30. It tottaly failed for me……even with the regulators this circuit tottaly sucks!!!!One of the TDA chips even caught fire!!!

  31. I want to buy the Description of the amplifier circuit with TDA 2030. Any one can give me the contact details of delar/saler for this above circuit. My cell number is +919409176617.

  32. hi can i use ne5532p inplace of ne5532n??
    also can i use its pre-amplifier only n connect it to other power amplifier as i am unable to find tda 2030 here??
    plzz reply soon

  33. hi i made this but didnt i wanna know can i use ne5532p in place of ne5532n?
    and can i use it pre-amplifier only upto bass controller??
    plzz reply soon

  34. do we need to use logarithmic or linear pots? will 1A voltage regulators be fine or do we need more powerfull ones? thanks in advanced

  35. how to make correct PCB layout is this copper side in 1st picture when i get this leaser jet printer it how can print it please tell me how to…

  36. Hello!
    I wonder if the author can contact me please. I am currenctly working on this circuit and have some questions for him (you)
    Thank you very much!

  37. Works very well, i have even used this to build a 250 watts low pass amplifier that drives my night club speakers, it’s very amazing and easy to build!!

  38. The power supply in this circuit is not enough for the job. LM7812 & LM7912 max rated output supply current is at 1A, and one TDA2030 can draw a supply current of 500 mA at 8 Ohm 9W, and even 900 mA at 4 Ohm 14W (see the datasheet)

    Components getting way too hot when running the circuit longer is a sign that something isn’t right. Adding a fan may seems to have helped, but the actual problem is still there, and the ICs will fail sooner or later.

    Therefore, the right solution is to use a center tapped 4.5A with two 15V primary tap power transformer, a 4A bridge rectifier, and boost the output supply current from 1A to 4A using power transistors and a power resistor.

    Or, if that’s too much of a hassle, just use an external 4A dual 12V power supply unit.

    • Hi.
      you are right, but for me this is how i did mine, instead i used but TDA 2050 so that it could give me the best amount of sound i need and also the transformer i used was +/-15VAC 1.2A, it worked well for me and less heat from the whole schem

    • yes you can use
      there is no difference in tda2030 and tda 2030a except of wattage
      tda2030 is of 14Watts Where as tda2030a is of 18 Watts 🙂

  39. i build this 2.1 subwoofer with 2 satelite speaker. the subwoofer sound looking good. but may be better if the potensiometer 10 k ohm replaced with the 100 k Ohm.

  40. i use the layout but doesnt work for me.when i turned on d circuit a loud noise will come out and the 3 tda2030 were so hot.what should i do?pls help me!

    • The TDA 2030 is a cuircuit nesscite that a peak to peak voltage (+12 and -12) to work is not as cele TDA2003 for this you are in need of a transformer has midpoint (three wire output)

    • the value of vss is -12v to -18v and the vcc is +12 to +18v
      you need a peak to peak transformer that can give 12v 3.5A the best is 13v 3.5A because the subwoofer need much courant to work in a good condision that’s why we used the NE555 to increase the signal

  41. where’s the treble control? more complete if this scheme/layout has treble control beside bass control+general volume control

    • you can make a simple one before you that the sound get in the amplifier so your voice come from your mp3 or any thing and get in the equalizer than the out put of equalizer get in the amplifier her is a simple example it is a momo one so you need to make two for each entry that means one for the R input and one for the L input her is the link i hope it will help you

    • hi friend i build it and its very nice but you need to use a powerful transformer to have the best sound i used one wich give 18v 2.5A so its worked nice and i add a fan because it get hot when it work for along time (2 to 5 hour)

  42. Çalışmanızı beğeniyorum ve izliyorum Ben artık Amatör elektronikçi olarak zaman geçiriyorum bana gönderdiğiniz
    email için Teşekkür ederim. Saygılarımla


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