Audio Amp Circuits

Discussion in 'General Electronics Chat' started by Firestorm, May 8, 2005.

  1. Firestorm

    Thread Starter Senior Member

    Jan 24, 2005
    353
    0
    Hey,
    I am playing around with some old speakers and and found 4 0-5W/8Ω speakers.
    I am wanting to hook them up to my cd player and was thinking about building an amp for it. What size amp would I need? Some1 suggested the 386.
    I am wanting to build bigger amps as well but don't really know much about them. Want to eventually build 1 for my truck once I turn 16(21 days lol :)). Can anyone guide me in what to look for when building an amp and the info needed b4 I start. Sorta new in the whole audio part. Thanks l8er

    -fire
     
  2. legac

    Well-Known Member

    May 4, 2005
    54
    0
    Hi
    I think you can try TDA 2030 or LM 1875 Do a google search, you will see a lot of projects based on those tiny chips
    Cheers
    legac
     
  3. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    hello firestorm,

    is that a 0.5w spkr or 5w spkr. if it's 0.5w, the LM386-4 will do. you will have to make 2 sets for stereo.

    if it is 5w, the TDA1524 will do. it is a 4 channel single chip audio ic. it has a 5w output per channel. that is a very versatile chip in which you can bridge it or parallel it or bridge/parallel it. however it has a small drawback, it's a class B ic power amp.
     
  4. Firestorm

    Thread Starter Senior Member

    Jan 24, 2005
    353
    0
    thx for the replys moz and legac.
    each speaker is 5W.
    What exactly does a class B power amp mean?
    With the 4 channels, does this mean each channel can be hooked up to a speaker and each have 5Ws of power? What is the benefit of bridging or paralleling it? Fixin to check out the datasheet on these chips :). thx again

    -fire
     
  5. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    hi

    by bridging you increase the power output and by parallel you increase the power dissipation capability of the chip while still retaining the original power output. :D
     
  6. Firestorm

    Thread Starter Senior Member

    Jan 24, 2005
    353
    0
    :) thx for the help, just looked at the datasheets and will hopefully figure it out after some sleep :)
    thx again

    -fire
     
  7. David Bridgen

    Senior Member

    Feb 10, 2005
    278
    0
    A stage operating in class A conducts throughout the whole of the input cycle.

    ................................ class B conducts during half the input cycle.

    ................................ class C conducts during a small portion of the input cycle.


    Dissipation in class A is highest.

    Dissipation in class C lowest. You won't see class C used for a.f. It is used only for some r.f. applications.
     
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