TDA2030 2.1 amplifier board circuit diagram subwoofer

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

TDA2030 2.1 amplifier board circuit diagram subwoofer. 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).

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

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

The power supply is of the symmetrical type, it uses a transformer according to the network in your region, 110 or 220 with double secondary of 12 volts. I recommend using a fuse and a switch before the transformer. B1 is a rectifier bridge of at least 100 volts/4 A, an example that can be used is the GBU606, the filtering is up to the capacitors C8, C9, C10 and C11, the electrolytic can have values starting at 4,700µF. To power the bass filter op amp, three-terminal LM7812 and LM7912 integrated circuits are used.

Satellite speaker amplifier circuit

The right and left channels are exactly the same, let’s see how the left channel works: CNIN is the audio input connector, coupled by C2 to the volume adjustment potentiometer, it is a double potentiometer, adjusting both channels simultaneously. R3/C4 and R16/C29 help to improve the treble signal. Capacitors C6 and C31 couple the signal to IC2 and IC6 (TDA2030), after amplification the audio output is pin 4 of the integrated TDA2030. Resistors R7/R9 and R20/R22 are responsible for feedback, so by changing the value of R7 and R20 we can increase or decrease the amplifier gain. R11/C12, R24/C35 and R23/C34 form the compensation network for the speakers.

Subwoofer pre and amplifier circuit

The signal to the subwoofer comes from the left and right channels through resistors R1 and R2 being coupled by capacitor C5, is applied to amplifier 1 of the operational NE5532 IC1A, which forms a preamplifier to boost the signal by 6 times. Determined by resistors R6/R8.

The components R10, R12, C18, C17 and IC1B form a low-pass filter that in this case is calculated for 200Hz. After leaving IC1B the low frequency audio goes through potentiometer P1 that makes the volume adjustment, then forwarded to IC3 that is the bass channel amplifier, the working principle is the same as the satellite amplifiers.

TDA2030 2.1 amplifier board circuit diagram subwoofer

Tda2030 2.1 Amplifier Board Circuit Diagram Subwoofer

PCB for TDA2030 2.1 amplifier board circuit diagram subwoofer

Tda2030 2.1 Amplifier Board Circuit Diagram Subwoofer Pcb For Tda2030 2.1 Amplifier Board Circuit Diagram Subwoofer
Tda2030 2.1 Amplifier Board Circuit Diagram Subwoofer Pcb For Tda2030 2.1 Amplifier Board Circuit Diagram Subwoofer
Amplifier With Tda2030 2.1 Pcb Silk

This is our suggested PCB for mounting the circuit, an observation is that as I did not design it for double-sided at first, we have to use some jumpers in the circuit. The circuit works even if mounted on a single-sided board. This time to try a more compact board the components are closer to each other, as well as a different assembly for several resistors in the circuit. The board is very detailed with downloadable PDFs of the board + schematic + component side and silk screen, all in high resolution.

In board version 2021 with some improvements and available Gerber file for making the PCB. However, the board is still fully compatible with home production board, but now with better component positioning and smaller dimensions. Some additional filter components have been added.

Also, included is a 12V power connector to be used for powering MP3 and Bluetooth modules.

For power supply a 12 + 12V/4A transformer can be used if used with TDA2030 or up to 17 + 17V if mounted with TDA2050 or LM1875. In this case, the working voltage of the electrolytic capacitors should be 35V. However, even with TDA2050 or LM1875, you can use a 12 + 12 V transformer.

Table of components to be used
IC TDA2030 TDA2050 TDA2040 LM1875
Maximum power supply 12+12 VAC 18+18 VAC 14+14 VAC 18+18 VAC
Maximum power* 3×18 W 3X 35W 3X 30W 3x 30W
Working voltage of the capacitors 25V 35V 35V 35V

It can also be combined the chips as 2X TDA2030 + 1X TDA2050 with 12+12 VAC trafo and maximum power up to 18+18+24 Watts.

Nothing prevents using any of the Cis as TDA2050 with lower voltage trafo.

The recommended heat sink is 100 x 33 x 45 or larger

It is important to insulate the body of the TDA2030 ICs from the heatsink using insulation between the metal parts. Including sleeves for the screws.

Silicone Thermal Heatsink Pad Insulator Screw

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

Can be used TDA2030, TDA2030A, TDA2030H, TDA2040, TDA2040V, TDA2050, TDA2050A, TDA2050L, TDA2050G, TDA2050V, Lm1875, LM1875T or equivalent

NE5532, SA5532, SE5532, NE5532A, SE5532A or equivalent

BOM to assemble amplifier TDA2030 2.1 tda2030 2.1 subwoofer circuit diagram

Last update: 08/17/2021 19:15

Part Value Description Quantity
Capacitors – Electrolytic 25 to 35V – Polyester and Ceramic 50 to 100V
C1, C19 120p (121) Ceramic Capacitor 2
C2, C5, C7, C22, C33 10µF/25V Electrolytic Capacitor 5
C3, C12, C18, C34, C35 100n/63V (104, 0.1u, .1, 100n) Polyester Capacitor 5
C4, C29 2n2/63V (222, 0.0022, 2200p) Polyester Capacitor 2
C6, C17, C31 220n a 1µF/63V (224, 0.22u, .22, 220n) Polyester Capacitor 3
C8, C9 4700µF/25V Electrolytic Capacitor 2
C10, C11, C15, C16, C20, C21, C23, C24, 100nF ((104, 0.1u, .1, 100n) Ceramic Capacitor 8
C13, C14 100µF/25V Electrolytic Capacitor 2
C25, C26, C27, C28, C32 22µF/25V Electrolytic Capacitor 5
C30 4.7µF/25V Electrolytic Capacitor 1
B1 KBL608 or equivalent Bridge rectifier 1
IC1 NE5532 or equivalent DIP8 dual operational amplifier 1
IC2, IC5, IC6 TDA2030A or equivalent Audio amplifier integrated circuit 3
IC3 LM7812 3-pin voltage regulator, 12V positive 1
IC4 LM7912 3-pin voltage regulator, negative -12V 1
LED1, LED2 LED 5 mm Red LED 2
Resistors 1/4W 5%
R1, R2, R3, R10, R12, R13, R14, R16 10k Brown, Black, Orange, Gold 8
R4 100k Brown, Black, Yellow, Gold 1
R5, R17, R19, R21 22k Red, Red, Orange, Gold 4
R6, R7, R18, R20 470 Yellow, Violet, Brown, Gold 4
R8, R9, R22 33k Orange, Orange, Orange, Gold 3
R11, R23, R24 10 / 0,5W Brown, Black, Red, Gold 3
R15 1k Brown, Black, Red, Gold 1
CN1 OUTL (Left channel output) Male KK connector 2.54 mm 3-way 1
CN2 OUTL (Left channel output) Terminal block 2 pin 5.08 mm 1
CN3 OUTR (Right channel output) Terminal block 2 pin 5.08 mm 1
CN4 SUB (Subwoofer output) Terminal block 2 pin 5.08 mm 1
CN5 12V (12V DC output) Male KK connector 2.54 mm 3-way 1
CN6 AC (Power Transformer) Terminal block 3 pin 5.08 mm 1
P1 47K (473) Double potentiometer 1
P2 47k (473) Potentiometer 1
Solder, Wires, Pci, Box, transformer, knob, screws, heat sink, insulation mica, etc

*C3 is not required.

For mounting on the board or in front of the cabinet(in this case use shielded wires for connection)

You can buy PCBs or kits to assemble in sites like eBay and AliExpress, in these last ones with interesting prices… but for those who like to assemble according to their taste, hands on!

That’s it guys, this is the first version, in the next one we’ll try other more powerful integrated ones and also a bridge assembly for the bass amplifier, please leave your opinion, if there is something wrong or to be improved, let us know, that’s it for now… now it’s 1:20 a.m.!

Just a reminder that if you want the library for TDA2030 2.1 and Ne5532 for Eagle, these components are in the Linear library.

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

165 thoughts on “TDA2030 2.1 amplifier board circuit diagram subwoofer”

  1. hi Toni, i have made this pcb but subwoofer ics have continuous humming without any input and both volume at zero. if we disconnect input form bass potentiometer tda 2030 don’t have humming . i have tried each and every thing but 120hz humming is not going . even i have removed one ic from bridge pair but humming is continuous . it will be very helpful if you can tell about this issue. or share your mail id i will share photos or video so you can understand this issue.

  2. 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?

  3. 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

  4. 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.

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

  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! :D

  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

  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…

    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
    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 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

    • 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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