Circuit Power audio Amplifier with TDA2030 2.1 Chanell – 3 x 18 Watts – Subwoofer – Complete With PCB suggestion and power supply

This circuit is a complete application is 2.1 amp, two satellite speakers for TDA and one for the subwoofer, making 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).

power amplifier tda2030 2.1 subwoofer 450x360 Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

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

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

power amplifier tda2030 2.1 subwoofer 450x292 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

power amplifier tda2030 2.1 subwoofer pcb Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

PCB - Bottom Side

power amplifier tda2030 2.1 subwoofer pcb 2 Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

PCB - Component side - Optional


power amplifier tda2030 2.1 subwoofer component side 450x205 Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

Component Layout - Component side -Click to Enlarge


amplifier tda2030 2.1 subwoofer silk Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

Component silk-screen

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 – 100n, 104, 0.1 – 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 – Electrolytic Capacitor or Ceramic
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

tda2030 NE5532 7812 7912 pins data Circuit Power audio Amplifier with TDA2030 2.1 Chanell   3 x 18 Watts   Subwoofer   Complete With PCB suggestion  and power supply

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.

Users electronic tags:

7912, 2 1 amplifier circuit diagram, subwoofer, Intex amplifier circuits, 2030 ic subwoofer circuit, top power amp pcb untuk speaker 8 ohm, ic tda 2030, 2 1 home theater circuit, 2 1 home theatre circuit diagram, intex 2 1 speakers circuit diagram

Filed Under: AmplifierAudioCircuits


About the Author: blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

RSSComments (66)

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  1. Yassueidi says:

    Dear Tony, for quick respond.



  2. Ahmad Alabsi says:

    Help me!! I want to buld an subwoofer amp just give me bass i wana an

  3. Deniel says:

    The good circuit, I built it two times, and the excellent two.

  4. Tonifa says:

    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!

  5. Ahmad says:

    how can I merge tda 2030 for building woofer thanks

  6. rohin says:

    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.

  7. auxrtics audios says:

    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
    i have a complete tutorial on a wide range of audio circuits.

  8. rohin says:

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

  9. nobody says:

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

  10. wolsty7 says:

    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 please help me

  11. Justin says:

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

  12. ujjwal biswas says:

    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.

  13. vince says:

    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

  14. vince says:

    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

  15. Lari says:

    What kind of heatsinks should I use for TDA2030 and regulators?

  16. matt says:

    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

  17. Tanakith says:

    Hi all! I Give Up file all PCB then.’s Here.

  18. dasun says:

    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…

  19. Elektro says:

    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!

  20. ishan1211 says:

    pls reupload pcb layout.pdf abovelink is no longer valid.
    Thanks u very much sharing this circuit.

  21. Nkwenti says:

    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!!

  22. Deepu says:

    It works nice. But noice coming from sub. Iam using 40w woofer but at loud full noice come out. Help me

  23. Brian says:

    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.

    • Nkwenti says:

      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

  24. Rockmaker says:


    Can you, please, re-upload PCB files? is not working.

    Thank you.

  25. Abhishek says:

    to all ICs to give Power

  26. Abhishek says:

    4 Ohm.

  27. Adarshv says:

    Please Make A Mirror On PDF .

    Advance Thanks

  28. clobo says:

    Can i use TDA2030A instead of TDA2030 in this circuit……….?????????????

    • auxrtics audios says:

      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 :)

  29. Ebro says:

    saya mau coba mudah mudahan bisa , karena sesungguhnya saya juga masih sangat belajar ingin bisa….terima kasih boss…

  30. ALPHA says:

    what to use for pasting when changing a new IC TDA 2030?

  31. mark says:

    sir what speaker impedance ratings do i need to connect to this circuit? 4 ohms, 8 ohms or 16 ohms?

  32. Adil says:

    Can you send me a pdf file?

  33. t.mangaramdevi says:

    where i can get this pcb in vijayawada

  34. andriek says:

    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.

  35. mark says:

    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!

  36. sairam says:

    where do the vdd and vss go please specify….v+ or v_ or gnd

    • noeman says:

      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)

  37. mohab says:

    any one make it it doesnt work for me and another question in powe supply vss and vdd what the value???????

    • noeman says:

      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

  38. kurniawan teguh says:

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

    • noeman says:

      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

  39. Awais mughal says:

    can u made this..? what is progress of this circuit..!

  40. Awais mughal says:

    Any one made this..?

  41. Asath maduranga says:

    I want to know this curcit can be use tda2050

  42. Asath maduranga says:

    Thnkz for all

  43. Marinus says:

    Has anyone build this amplifier? Want to know how good it is?

    • Toni says:

      This circuit is used in many commercial equipment

    • noeman says:

      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)

  44. Arittra says:

    how to rectify noise in ur low pass filter low-pass filter ?

  45. renatskie says:

    Thanks for the layout hoping its work for me…

  46. Niyazi says:

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

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