STK 361 weaker IC as power amp than LA 4440 STK 361, Amplifier

Discussion in 'Electronic Design' started by cozz in or out, Sep 27, 2007.

  1. Hi ,
    i dreamt of a good poer amp for long and found circuit that tells
    360W amp
    had input for all like tuner ,cd etc

    I hv assembled it .however after running the power amp with some
    inputs
    i was surprized to see that the AMP is very weak ..
    it needed 15a-0-15a supply ..that cosed 20% more

    whole amp kit costed 40% more ...finally I to discover that it is v
    poor
    as compared to kits with 4440 ICs ..

    Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..
     
    cozz in or out, Sep 27, 2007
    #1
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  2. cozz in or out

    Guest

    On Sep 26, 11:19 pm, cozz in or out <> wrote:
    > Hi ,
    > i dreamt of a good poer amp for long and found circuit that tells
    > 360W amp
    > had input for all like tuner ,cd etc
    >
    > I hv assembled it .however after running the power amp with some
    > inputs
    > i was surprized to see that the AMP is very weak ..
    > it needed 15a-0-15a supply ..that cosed 20% more
    >
    > whole amp kit costed 40% more ...finally I to discover that it is v
    > poor
    > as compared to kits with 4440 ICs ..
    >
    > Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..




    do you have a power supply that can provide at least 720 W? Class AB
    amplifiers are only 50% efficient or so, so you'll need to provide
    double the juice it needs from your power supply.
     
    , Sep 27, 2007
    #2
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  3. On Sep 27, 8:37 pm, wrote:
    > On Sep 26, 11:19 pm,cozz in or out<> wrote:
    >
    > > Hi ,
    > > i dreamt of a good poer amp for long and found circuit that tells
    > > 360W amp
    > > had input for all like tuner ,cd etc

    >
    > > I hv assembled it .however after running the power amp with some
    > > inputs
    > > i was surprized to see that the AMP is very weak ..
    > > it needed 15a-0-15a supply ..that cosed 20% more

    >
    > > whole amp kit costed 40% more ...finally I to discover that it is v
    > > poor
    > > as compared to kits with 4440 ICs ..

    >
    > > Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..

    >
    > do you have a power supply that can provide at least 720 W? Class AB
    > amplifiers are only 50% efficient or so, so you'll need to provide
    > double the juice it needs from your power supply.


    thanks ,
    360 w PMPO that was the title of the circuit published in
    'Electronics for you ' magazine ...STK 361 is some 25 or 50w rms
    chip i think ..
    Is the power supply that might be the cause ??
    the Amp was running fine ...amplifying but But very poor Output.....

    (i hope a power supply *stronger* than normal PSs of 12-0-12 3 Amp LA
    LA4440 based amps should be sufficient ])
     
    cozz in or out, Oct 10, 2007
    #3
  4. cozz in or out

    Eeyore Guest

    cozz in or out wrote:

    > On Sep 27, 8:37 pm, wrote:
    > > On Sep 26, 11:19 pm,cozz in or out<> wrote:
    > >
    > > > Hi ,
    > > > i dreamt of a good poer amp for long and found circuit that tells
    > > > 360W amp
    > > > had input for all like tuner ,cd etc

    > >
    > > > I hv assembled it .however after running the power amp with some
    > > > inputs
    > > > i was surprized to see that the AMP is very weak ..
    > > > it needed 15a-0-15a supply ..that cosed 20% more

    > >
    > > > whole amp kit costed 40% more ...finally I to discover that it is v
    > > > poor
    > > > as compared to kits with 4440 ICs ..

    > >
    > > > Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..

    > >
    > > do you have a power supply that can provide at least 720 W? Class AB
    > > amplifiers are only 50% efficient or so, so you'll need to provide
    > > double the juice it needs from your power supply.

    >
    > thanks ,
    > 360 w PMPO that was the title of the circuit published in
    > 'Electronics for you ' magazine ...STK 361 is some 25 or 50w rms
    > chip i think ..
    > Is the power supply that might be the cause ??
    > the Amp was running fine ...amplifying but But very poor Output.....
    >
    > (i hope a power supply *stronger* than normal PSs of 12-0-12 3 Amp LA
    > LA4440 based amps should be sufficient ])


    Neither are even remotely anywhere near 360W ! You should be able to see that
    from the power supply voltage !

    http://www.electronica.ro/audio/LA4440.shtml - it's 19W

    The magazine is LYING.

    Graham
     
    Eeyore, Oct 10, 2007
    #4
  5. On Oct 10, 12:03 pm, Eeyore <>
    wrote:
    > cozz in or out wrote:
    >
    >
    >
    >
    >
    > > On Sep 27, 8:37 pm, wrote:
    > > > On Sep 26, 11:19 pm,cozz in or out<> wrote:

    >
    > > > > Hi ,
    > > > > i dreamt of a good poer amp for long and found circuit that tells
    > > > > 360W amp
    > > > > had input for all like tuner ,cd etc

    >
    > > > > I hv assembled it .however after running the power amp with some
    > > > > inputs
    > > > > i was surprized to see that the AMP is very weak ..
    > > > > it needed 15a-0-15a supply ..that cosed 20% more

    >
    > > > > whole amp kit costed 40% more ...finally I to discover that it is v
    > > > > poor
    > > > > as compared to kits with 4440 ICs ..

    >
    > > > > Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..

    >
    > > > do you have a power supply that can provide at least 720 W? Class AB
    > > > amplifiers are only 50% efficient or so, so you'll need to provide
    > > > double the juice it needs from your power supply.

    >
    > > thanks ,
    > > 360 w PMPO that was the title of the circuit published in
    > > 'Electronics for you ' magazine ...STK 361 is some 25 or 50w rms
    > > chip i think ..
    > > Is the power supply that might be the cause ??
    > > the Amp was running fine ...amplifying but But very poor Output.....

    >
    > > (i hope a power supply *stronger* than normal PSs of 12-0-12 3 Amp LA
    > > LA4440 based amps should be sufficient ])

    >
    > Neither are even remotely anywhere near 360W ! You should be able to see that
    > from the power supply voltage !
    >
    > http://www.electronica.ro/audio/LA4440.shtml - it's 19W
    >
    > The magazine is LYING.
    >
    > Graham- Hide quoted text -
    >
    > - Show quoted text -


    that 360 PMPO wattage is a marketig term i know .... u can see SONY
    6000w music system being sold in nearby show room ..which takes 40-80w
    power while running ... :)

    but the query still remains unanswered ... why is STK 361 is giving
    weak output ..than LA 4440 [i know LA4440 gives sufficient amount of
    output for normal home use ..i wanted a more powerful AMP ...and ended
    up with STK 361]..

    i have heard that STK 361 is used with SONODYNE soundsystems....must
    be having good power inside ....
     
    cozz in or out, Oct 10, 2007
    #5
  6. cozz in or out

    Guest

    On Sep 27, 3:19 pm, cozz in or out <> wrote:
    > Hi ,
    > i dreamt of a good poer amp for long and found circuit that tells
    > 360W amp
    > had input for all like tuner ,cd etc
    >
    > I hv assembled it .however after running the power amp with some
    > inputs
    > i was surprized to see that the AMP is very weak ..
    > it needed 15a-0-15a supply ..that cosed 20% more
    >
    > whole amp kit costed 40% more ...finally I to discover that it is v
    > poor
    > as compared to kits with 4440 ICs ..
    >
    > Is STK 361 weaker IC as power amp than LA 4440 ,please coment ..


    Dears
    I think you should try on KIA6216H ICs, May be it gives you better
    result .

    I.K.KHAN
     
    , Oct 18, 2007
    #6
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