Power Amplifier with Subwoofer – TDA2030 and Ne5532 – 2 x 18 Watts + 30 W Bass

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This circuit is typical of systems sold for 2.1 PC surround systems, left and right channel and subwoofer. Just plugging in the stereo audio and adjust the volume

Audio amplifier circuit using integrated TDA2030 and op amp Ne5532, has two stereo amplifier left and right satellite and Bass amplifier using TDA2030 in bridge for more power. The filter is made by double operational amplifier Ne5532. Complete assembly with the suggestion of the printed circuit board and has a power supply coupled to the circuit.

This circuit is a remake of another already posted on the Blog, but with some changes, uses two TDA ic’s in bridge to the subwoofer amp, with a new board design with some improvements. The idea is that to achieve maximum 18Watts satellites and the outputs 32 watts in Subwoofer … This power with a maximum of + -18 Volts Speakers and 4Ω. The circuit has adjustable volume for the stereo and subwoofer. Use pots of good quality to make this work.

By making the assembly check all connections and all components are correctly positioned, and the orientation of the pcb, be mounted inverted not seen it work, the components have to be positioned as illustrated above. When mounting make sure that the pin 7812 is different from 7912. Use a good heat sink to the TDA IC’s.

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The power supply  is already fixed in the PCB and only add the transformer, to be with center tap on the secondary and primary according to the network (110/220). The capacitors can be supply of the  4.700μF at 10.000μF, the resistors are in parallel to discharge these capacitors Great. Always use good quality components in its assembly.

The appropriate transformer to the circuit, according to my withdrawal must be at least 3 A transformer or to the 60VA 12-0-12 Volts.

Schematic 2.1 audio Amplifier with TDA2030 in bridge

Power Amplifier with Subwoofer – TDA2030 and Ne5532 – 2 x 18 Watts + 30 W Bass
Schematic tda2030 2.1

Suggested Printed Circuit Board 2.1 audio amplifier with Subwoofer Amplifier

tda2030 2.1 amplifier subwoofer Bridge PCB silk

List of material for assembly of the power amplifier with subwoofer with TDA2030 and Ne5532

Resistor 1/4W 5%
R1, R11, R22,470 – Yellow, Violet, Brown, Gold
R2, R722k/1W- Red, Red, Orange, Gold
R3, R12, R23,33k – Orange, Orange, Orange, Gold
R44.7k – Yellow, Violet, Red, Gold
R5, R13, R14, R16, R17, R21, R2622K – Red, Red, Orange, Gold
R6, R15, R18, R20, R2910 – Brown, Black, Black, Gold
R8, R9, R19, R2710k – Brown, Black, Orange, Gold
R10, R24680 – Blue, Green, Brown, Gold
R25, R28100k – Brown, Black, Yellow, Gold
C1, C7, C11, C12, C18, C21, C25, C26, C29, C30, C31, C37, C38, C39, C4410µF/25V – Electrolytic Capacitor
C2, C32, C33, C34, C35, C36, C40, C43, C454.700µF at 10.000µF/25V – Electrolytic Capacitor
C3, C8, C13, C15, C19, C28100n (104) – Ceramic capacitor
C4, C9100µF/25V – Electrolytic Capacitor
C5, C13, C15, C22, C23, C24100n (104) – Polyester capacitor
C6, C16, C272n2 (222) – Polyester capacitor
C10, C17220n (224) – Polyester capacitor
C14, C2022µF/25V – Electrolytic Capacitor
C41, C42220p – Ceramic Capacitor
B1KBU8B – Bridge Rectifier – 100V 8A or equivalent.
IC37812T – Positive Voltage Regulator +12 V Any prefix (LM, NS, KA, etc.).
IC17912T – Negative Voltage Regulator -12V. Any prefix (LM, NS, KA, etc.).
IC2, IC4, IC5, IC7TDA2030 or TDA2030A – Audio amplifier integrated circuit
IC6NE5532N – Integrated Circuit Dual Operational Amplifier
LED1Led 5 mm any color
AC3 Terminals Connector to the transformer
L-IN2 Terminals Connector left channel audio input
L-OUT2 Terminals Connector left channel audio output
R-IN2 Terminals Connector Right channel audio input
R-OUT2 Terminals Connector Right channel audio Output
SUB2 Terminals Connector Subwoofer audio output
P150k – 47K or 50k – Double logarithmic pot, Main Volume Adjustment
P250k – 47K or 50k – Single potentiometer – Adjust the subwoofer volume
Soldering, transformer 12 +12 / 4 Amps (50 Va), Wire, Box for Amplifier, PCB, heat sink for the IC TDA, etc..

*See text

Download files for this assembly
– PDF PCB, Schematic,PDF, silk screen, TDA2030A and NE5532 Datasheet .
Download PDF     Mirror


Circuit Mini FM transmitter – video assembly instructions

Download Capacitor Conversions Ver 1.2.0 – pF to nF to µF


100 thoughts on “Power Amplifier with Subwoofer – TDA2030 and Ne5532 – 2 x 18 Watts + 30 W Bass”

  1. Hello,

    I purchased a Soundbar with subwoofer in 2018 as follows:

    Majority 150W TV Sound Bar Wireless Subwoofer with Bluetooth Optical Audio

    The Subwoofer connects properly via Wifi but the sound coming out is practically non-existent. I asked a technician friend of mine to have a look and he told me that the PCB needs to be replaced. Since I’m a non-technie where these things are concerned, can you please tell me if you can send me a replacement part or what specifications you would need to know before being able to answer me. I would appreciate an estimate cost for sending me the replacement part if it’s possible. I live in Malta (Europe).

    I look forward to your kind and positive response.

    Thanks and regards,

  2. Did you tell me which power rating this PCB should be suited? I have used 12-0-12 2Amps transformer, it burned both the ICs of the subwoofer.

  3. Ola Toni, grat job is any possibility to get original grabel data or source file, i need for my cnc machine.

  4. Ola Toni, grat job is any possibility to get original grabel data or source file, i need for my cnc machine.

  5. Hi toni,

    very nice work ..great 🙂

    which software u r using to make designs plz advise ..what r d charges for making design as i have 2 amp schemetics & want to make pcbs ..plz reply on my whatsapp if possible

    Niraj panchal
    +91 9426801184

  6. HI,
    i`m in the middle of this project, i found many differences between pcb labeled components and parts list you gave on site, plz tell me should i follow components of pcb Diagram or Components list on website ?
    R27 is 100k or 10k
    C13 & C15 Ceremic or polyester, you mentioned both
    R19 10 or 10K
    R18 10 or 4.7k

    btw thanks for this project , i will be waiting for your reply .,

  7. what is the size of pcb

    it will be a pleasure if you reply this, as many of us are stuck due to size problem
    Sunain Rizwan

  8. dear tony,
    what is the height and width of this pcb?i was going to order that circuit to be printed then they asked me about the dimensions.can you help me please? btw very nice work.

  9. On the 2.1 Amplifier with Subwoofer using a TDA2030 & NE5532. Can the TDA2030 be replaced by TDA2050 using the same circuit for a little more output. I hope you can help.

  10. Dear Toni,

    I assemble the pcb. after i have two problem in there.
    first one is bass is not clear another one is one Chanel sound is very minimum.
    Plz toni help me soon as possible.

  11. Dear Toni,

    I asenbled to thise obe. But after asembel op amp ic was too hot. After i change the ic. It’s ok. But bass not clear & one speaker chanel sound is minimun than nother chanel. Plz help me…. 🙏🏾🙏🙏🙏🙏🙏😢

  12. Hi Toni,
    Bridge tda 2030 not out of sound, because not have resistor and electrolyte. please look at schematic bridge tda 2030, you can see differences them. Correct me If I wrong, Huge for you!

    • Oh yeah, please look at schematic TDA 2030 in Bridge Mode, U can see at PIN number 2, That pin is differences. please add resistor 47ohm And resistor 470. thank you.

      • Hi friend,
        I think you can help me… problem is bass is not clear & one chanel sound is too minimum than nother chanel… plz help me bro… 🙏🙏

  13. I had assemble your sugested diagram but when i am connecting the woofer 4ohms 25w the transformer is geting over heated in 30min. What shall I do please help me.

  14. Hi! Tony, I am going to assemble your circuit but you please guide me that how should I add a pot for terrable in this circuit. You had given power trans. of 3A it will be suitable for it the ic2030 will not get heated or I will put 1A. You please suggest me please.

  15. I have a transformer with dual secondary 16V. After the rectifying I will bi +22v,-22V. The maximum supply voltage for the TDA2030 is +-18V. Will this transformer blow the ICs?

  16. Hi Xtronic, please help me to get this items, where can i buy this project as DIY i myself will assemble it..
    i am very much interested in this circuit..where can i order this..please help me..

  17. Hi Toni. what is the value of capacitor C2 and C7? is it 4700 or 10000 mf mf? I did not find 10000 mf capacitor? And can i use KBU8B 10A instead of 8? And Also can i got TDA2030A ICs instead of tda2030V .. Should it work?

    please tell me detail about the transformer used in this circuit…!

    thank u for showing this circuit and parts name….i have tried many of other circuits….but there is no clear description of parts and there no no power supply circuit diagram for that project.

  19. Bro..i have interest in making this amplifier..but some builders replyed its not fully configured,and the bridging is not well…can you plz give some updated one with corrected issues ….thnx…and wishes for your great future projects……

  20. I make it and … I lost (burn) my IC (SUB-) TDA2030 twice in each 10 seconds T_T .I think the bridge diagram is different from another common bridge diagram. Something strange…

    So i takeoff the SUB- IC and make it to 3x18W (Subwoffer 18Watt same sattlelite) It Ok!!.

    Sound is loud (for me) Bass sound is ok but I not finish yet. It must to burn about 6 hours to hear real sound…

  21. hi the sch of the bridged tda2030 is different from datasheet sch.is it ok to do this project.if any one had tested then plz say how it works.thankyou.

  22. the connections of ne5532n are ok that is v+ and v-…but for the IC’s tda2030v the pins are labelled as vdd and vss…..could u tell me where to hook up those vss and vdd….i mean is vdd–>v+ and vss–>v-….or does the ground wire come in the picture….thanks in advance!


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Crash Course Electronics and PCB Design
Crash Course Electronics and PCB Design
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS