sub-woofer for desktop

Discussion in 'General Electronics Chat' started by ranatungawk, Jul 27, 2011.

  1. ranatungawk

    Thread Starter Senior Member

    Oct 30, 2008
    147
    0
    Dear friends please give me a hint …

    I need to build a sub-woofer (only a sub-woofer) for my desktop PC.


    • Please send me simple circuit which works with 12V (Low-pass + Power amp for woofer speaker 5’’). No need high quality one.
    • tell me to where should I connect this ? because I need to connect this with existing desktop speakers.

    Regards
     
  2. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    1. We will not do your homework for you. However, you might want to search for the following - push pull amplifier (class A and class AB), RC low-pass filters, and op-amp feedback.

    2. There is usually a green audio out connector on the back of the PC.
     
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  3. Robert.Adams

    Active Member

    Feb 16, 2010
    112
    5
    I think his issue is that he wants to use it with his existing desktop speakers that are occupying the audio out. I guess that could be achievable by splicing into the connector, Low passing into your amplifier and subwoofer.
     
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  4. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    Some PCs also have a Sub/Center channel for surround sound speakers. The connector is black or brown. Some sound cards or software then use this channel as a low frequency effects channel, so your sub would work properly without a low pass.
     
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  5. ranatungawk

    Thread Starter Senior Member

    Oct 30, 2008
    147
    0
    dear friends;

    i found following circuit from one of my friends. Please tell me can i fulfill my requirement by this ?

    as i can see the is only simple amp .. is this included both of low-pass and the amp ?
     
  6. electronis whiz

    Well-Known Member

    Jul 29, 2010
    519
    27
    i made a homemade woofer for my tv and computer.

    parts old woofer speaker case and speaker.
    an amplifer and adaptor from a set of old pc speakers.
    a filter cap from a power supply.

    on mine i installed the amp knob through where the terminal plate used to be. coneected the filter cap in sieries between one of the speaker leads and the AMPs output. (this helps some but does not filter out all oft the non woofer noise.)

    to plug in 2 speakers in 1 jack you A need to splice them together or b go to an electronics store and get a 1-2 port eaphone jack adaptor.
     
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