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    LA4440 is a two channel audio power amplifier IC with inbuilt in dual channels enables it for stereo and bridge amplifier applications. In dual mode it gives 6 W per channel and in bridge mode 19 W output.

    It has good ripple rejection of 46dB, small residual noise, built in over voltage and surge voltage protection etc. ideal feature of the IC is its pin-to-pin protection. Here LA4440 is wired in Stereo configuration using both inputs and outputs.

    Features of LA4440

    • Built in two channels to use as Mono and Stereo
    • Dual mode 6W x 2 and Bridge mode 19W
    • 46 dB Ripple rejection
    • 18V Max. Power handling and 12V typical
    • Good channel separation and low distortion
    • Built in Audio Muting function and Pin-to-Pin protection
    • Surge protection circuitry

    Schematic of the LA4440 Stereo Amplifier Circuit

    la4440 stereo amplifier circuit

    Assembled LA4440 Amplifier

    attentionThe author D Mohankumar is not an active member anymore. Please take into consideration that the presented information might not be correct.
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    58 Responses to "LA4440 Stereo Amplifier"

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    1. Nelson Lamahewa says: on May 4, 2010 at 7:53 pm

      hello, I have already assembled this circuit and it is in a good condition. it is very populer among the hobbiest in srilanka
      if you have a powerful electric fencer charging citcuit diagram with transformer details , please send it for my purpose

      Like or Dislike: Thumb up 2 Thumb down 0

    2. IrrKlang_704 says: on July 9, 2010 at 10:37 am

      Dear Nelson,
      I would like to ask u about the performance of this circuit. How good it is and how good its sound quality is???

      Like or Dislike: Thumb up 0 Thumb down 0

    3. Prajankya says: on August 13, 2010 at 1:26 pm

      I hav just heard about it n purchased it….
      can u please say me the connectins 4 bass n treble,
      my ic is named as SK4440…
      m searchin 4 the answer…

      Like or Dislike: Thumb up 0 Thumb down 0

      • there re no options for setting bass n t in this ic.. it can be purchased as whole amplifier in any electronics part market.in delhi it would cost around rs 150 for 2xbridged circuit.

        Like or Dislike: Thumb up 0 Thumb down 0

      • You can use a simple bass treble separator circuit.

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    4. Samiuddhin says: on March 9, 2011 at 3:25 pm

      I want this circuit in Bridge mode. I’m Waiting for your answer, sir…

      Like or Dislike: Thumb up 0 Thumb down 0

    5. MANISHA says: on March 18, 2011 at 6:50 am

      sir,
      i have read the project mobile sniffer, and i hv done same for my third year project using ic la4440 but i couldnt work it sucssesfully so, guide me, and pls give more basic data about this project.

      Like or Dislike: Thumb up 0 Thumb down 0

    6. sir iam trying the project mobile sniffer but the first stage not detecting the singnals from mobile …. what might be the reason..?
      here i am using byg74gph diode in place of 1n34 will it work any alternative for 1n34 pls give me reply sir.

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    7. i am using byg74gph diode in place of 1n34 will it work any alternative for 1n34 pls give me reply sir.
      my mail ID is -> naresh501.2006@gmail.com

      Like or Dislike: Thumb up 0 Thumb down 0

    8. SIR, do we have any transistor equivalent to BFR96?also,what does NF mean in the pin connection of LA4440?

      Like or Dislike: Thumb up 0 Thumb down 0

    9. siva kumar says: on October 8, 2011 at 8:14 pm

      Hello sir.
      May i know how much power(watts)does this LA 4440 ic give.
      Plz ans my question.

      Like or Dislike: Thumb up 0 Thumb down 0

    10. Milan Das Adhikarry says: on October 27, 2011 at 5:19 pm

      I need LA4440 double IC circuit diagram.
      Please help me. Send to my email. I waiting for this.

      Like or Dislike: Thumb up 0 Thumb down 0

    11. shakeel ahmed says: on November 8, 2011 at 3:37 pm

      dear all
      i m making amplifier with LA4440. plz tell me how i wiring with base tone circuit. and also with computer. plz reply
      thanks..

      Like or Dislike: Thumb up 0 Thumb down 0

    12. HelloDear i already have a sterio amplifier using la 4440 ic.But it doer not give a satisfied power.So i looking for a more a powerfull ampliefier ic.If can help please do it now

      Like or Dislike: Thumb up 0 Thumb down 0

      • sivaraman says: on March 7, 2012 at 2:00 pm

        u use the sdk4141 ic

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      • babai says: on May 2, 2012 at 9:15 am

        use TA8231l it is a 2 chanel btl audio chip it will give you 42watt at 4e load supply voltage 12v

        Like or Dislike: Thumb up 0 Thumb down 0

      • hello friends i made a 600watt amplifier.
        it run by 8 mosfet tr and -\+80 8amp supply voltage. i made a spacial tone control circuit with LM324IC.
        this amp carrying the load of 4pcs of 8″ 80 watt 6e YAMAHA woofer,2pcs of 2.5″ synthetic dome tweeter and 2pcs of 4″ YAMAHA midreng.when i play this system it’s shaking my room’s stuffs and windows glasses

        Like or Dislike: Thumb up 0 Thumb down 1

      • hello babai i am also intrested in making the same as you made as i also have almost same set of speakers so plz provide me the circuit of your amplifier

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    13. sunil kumar says: on November 11, 2011 at 4:48 pm

      hello sir kripya 4440 and 3055 5tr audio board me mic connection kaha se lagayen jisse mic 2fit se catch kare

      Like or Dislike: Thumb up 0 Thumb down 0

    14. Can huming sound stops? HOW

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    15. balwinder says: on February 1, 2012 at 3:54 pm

      hi,i have LA4440 audio amplifier circuit in bridge mode with tone control using BC548 transistor.i have some basic knowldge about 4440 means its input terminal,its power suply,and its output terminal.but i am puzzle with tone control circuit.i know,i need 100K,22K and 47K variable resistor for its tone control ,but i dont now where from i pick up wires for treble,bass and volume.i need ur help.there are only 5 connection terminal showing on pcb board thats are,input,output,suply,and two from tone control circuit with common ground of each.tone control carrying 6 terminal but ground is common so it is 5 only bcz its a double ic amplifier circuit.there is manufacturer name is written on board that is ‘JAYKAY’.i get this board from CD player plz help me.thanks.

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      • sivaraman says: on March 7, 2012 at 2:07 pm

        u add the bass,treble board

        Like or Dislike: Thumb up 0 Thumb down 0

      • please specify me that are there any connection wire for bass in la4440 and i will connect 2 woofer as 80w with 8″,let me know if I am wrong that at first i need a transistor to connect to la4440,where to connect the volume,bass connection.please.

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    16. viSakh C Parayil says: on February 8, 2012 at 7:12 pm

      Hello ! I’d to know that can i Connect the out of a iPod as an INPUT to this Amplifier Circuit ??? Please reply soon !!! Thanks

      Like or Dislike: Thumb up 0 Thumb down 0

    17. i hav this one but voice quality goes down when opn full volume

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    18. ankit vishwakarma says: on March 27, 2012 at 9:35 pm

      sir mujhe jananaa hai ki 4440 me bass,trable,&volume ke liye kitne-2 k ohm ka tune lagega

      Like or Dislike: Thumb up 0 Thumb down 0

    19. Bharat jamra says: on April 29, 2012 at 7:25 pm

      Am making now one project of an used IC la4440 so i want cirrcute desing.

      Like or Dislike: Thumb up 0 Thumb down 0

    20. atul kawase says: on May 15, 2012 at 10:01 pm

      how can we separate bass and treabel from 4440

      Like or Dislike: Thumb up 0 Thumb down 0

    21. Saibal Roy says: on June 14, 2012 at 11:07 pm

      hi,sir i am complit this amplifire now,but a huming problem is comming ,
      for this reason my project is
      incomplit. plz plz help me…

      Like or Dislike: Thumb up 0 Thumb down 0

    22. thanx,but the sound quality of the circuit is not good enough,two use with pc.

      Like or Dislike: Thumb up 0 Thumb down 0

    23. How mutch is the maximum current gain….

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    24. Umair (Pakistan) says: on November 8, 2012 at 1:36 pm

      any one plz tell me the circuit of a simple base amplifier.

      Like or Dislike: Thumb up 0 Thumb down 0

    25. dharamveer says: on January 6, 2013 at 10:04 am
        member

      hi dear friends i hav got a very simple 100 watt 4440 double ic amplifier diagram with bass and treble.if anyone wants i will provide the circuit diagram.

      Like or Dislike: Thumb up 0 Thumb down 0

    26. maheshjshetty says: on March 5, 2013 at 3:52 pm
        member

      can i connect mobile phone in the input to hear the song loudly?

      Like or Dislike: Thumb up 0 Thumb down 0

    27. C.Mitra Chinmoy Mitra says: on July 29, 2013 at 3:47 pm

      Hi, there is one mistake in the schematic, yet people are making the circuit. R1, which is a 2.2k input load resistor for the left channel, is simply missing from the right channel. I know it will not seriously affect the performance of the amplifier, but it will definitely cause a difference in the overall gain balance of the two channels; the left channel will need a slightly higher signal level to provide the same output power as the right channel.

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    28. dharamveer says: on August 27, 2013 at 1:58 pm
        member

      Hi dear friends the recommended components are
      1 power supply 12v 3ah dc
      2 volume tone 100k
      3bass nd treble tones 50k each
      4filter capacitor 4700uf
      5 chasis ground frm capacitor negative to reduce noise

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    29. iftikhar hussan butt says: on September 6, 2013 at 7:40 pm

      it is a very warm powerful, best audio amplifier.
      I have much knowledge about it, any one may contact me if need any help.

      Butt Electronics (+92 345 6885512)

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    30. trevor dsouza says: on October 18, 2013 at 9:33 am

      sir i don’t get some ic so can you prouvide me an ic data book & eqilizer book or please tell me for ic CD4440 which ic can i use sir tank you

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    31. trevor dsouza says: on October 18, 2013 at 9:35 am

      hope it is a good complant suggestion

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    32. how many woofer can we install for a double ic amp,can you please suggest and along with woofer capacities for good bass i got a double ic amp so pls help me thankyou..

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    33. Hey guys,I have this circut.Just want to know,how to bridge between two channel.Can anyone help me?

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    34. I have la4400 circuit what transistor it require for input power.
      please specify me that are there any connection wire for bass in la4440 and i will connect 2 woofer speakers as 80w with 8″,let me know if I am wrong that at first i need a transistor to connect to la4440,where to connect the volume,bass connection.please.

      Like or Dislike: Thumb up 0 Thumb down 0

    35. Muzamil Ali says: on March 9, 2014 at 6:40 pm

      My dear the terminal of of 4440 … 11th is positive terminal of and 1St 14th are negative … maximum input voltage 16v and minimum 12 golt 3 amp its work on Bike battery .. also

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    36. Sir,my la 4440 stereo board is working but audio is too low,the ic overheating,power supply 12 0 12v,2amp pls help me what is the problem

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