Adding subwoofer to desktop ACS340

Discussion in 'Electronic Repair' started by RichK, Jun 10, 2006.

  1. RichK

    RichK Guest

    Hi Guys,

    I would like to add a small subwoofer to my desktop PC speakers. The
    speakers are pretty good on their own, but extra base would be nice.

    Came by an Altec Lansing ACS340 subwoofer, which was part of a 3-speaker
    set. All the controls were in the small L&R speakers. Don't really want to
    reproduce the tone controls.

    Been looking for a schematic for the ACS340, but nowhere to be found. Would
    like to adapt it as independent sub with my present speakers. Any ideas?

    Regards,

    RichK
     
    RichK, Jun 10, 2006
    #1
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  2. RichK

    Simoc Guest

    Take a signal from them, filter out the higher frequencies, and amplify
    it to suitable for the subW.
     
    Simoc, Jun 10, 2006
    #2
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  3. RichK

    RichK Guest

    "Simoc" <> wrote in message

    > Take a signal from them, filter out the higher frequencies, and amplify
    > it to suitable for the subW.


    Well, the line input is in the subW, from which it normally goes to the L&R
    speakers. The amp is really in the subW, only the controls are normally in
    the L&R speakers (well one of them).

    With a schematic, I might be able to do some surgery :)

    RichK
     
    RichK, Jun 11, 2006
    #3
  4. RichK

    Simoc Guest

    RichK wrote:
    > Well, the line input is in the subW, from which it normally goes to the L&R
    > speakers.


    Hmm.. you probably mean that signal is normally fed there from L&R
    spkrs?

    > The amp is really in the subW, only the controls are normally in
    > the L&R speakers (well one of them).


    Then, I think that u just need to feed line signal to the input :) I
    don't think that you really need any other controls than volume in the
    subw, since it plays only sub-low-range.
     
    Simoc, Jun 12, 2006
    #4
  5. Simoc wrote:
    >
    > RichK wrote:
    > > Well, the line input is in the subW, from which it normally goes to the L&R
    > > speakers.

    >
    > Hmm.. you probably mean that signal is normally fed there from L&R
    > spkrs?
    >
    > > The amp is really in the subW, only the controls are normally in
    > > the L&R speakers (well one of them).

    >
    > Then, I think that u just need to feed line signal to the input :) I
    > don't think that you really need any other controls than volume in the
    > subw, since it plays only sub-low-range.



    The master volume control is on the right speaker, along with the
    power switch (on the back), a LED power indicator and the bass and
    treble controls. The left speaker is just that, a speaker.

    I have the two small ACS340 speakers, but not the subwoofer if the OP
    needs them.

    I have two other Altec Lansing subwoofer models, but I don't know if
    the small ACS340 speakers can be used with the ACS 295 or ACS 250 sub
    woofers.


    --
    My sig file can beat up your sig file!
     
    Michael A. Terrell, Jun 13, 2006
    #5
  6. I'd guess these are similar to my ASC 45's and my ACS 45.1's with the input
    on the sub and the volume control on the sattelite speakers, but yours
    having an analog control instead of digital (knob instead of push
    buttons)... I'm not sure how the handled that but the 45's and the 45.1's
    have a simple pinout only using 5 wires. It is a type of din connector that
    looks simiar to a ps-2 mouse or keyboard connector.

    If your connector is a 5 pin connector I believe this should be the proper
    wiring for it.
    ~~| |~~
    2 / * _ * \ 3
    1 \ * |_| * / 4
    \ * / 5
    ~~~~~
    GND
    pin 1 speaker R
    pin 2 speaker L
    pin 3 speaker DOWN volume bottom
    pin 4 speaker UP volume bottom
    pin 5 LED Green


    - Mike


    "Simoc" <> wrote in message
    news:...
    > RichK wrote:
    >> Well, the line input is in the subW, from which it normally goes to the
    >> L&R
    >> speakers.

    >
    > Hmm.. you probably mean that signal is normally fed there from L&R
    > spkrs?
    >
    >> The amp is really in the subW, only the controls are normally in
    >> the L&R speakers (well one of them).

    >
    > Then, I think that u just need to feed line signal to the input :) I
    > don't think that you really need any other controls than volume in the
    > subw, since it plays only sub-low-range.
    >
     
    Michael Kennedy, Jun 13, 2006
    #6
  7. RichK

    RichK Guest

    Hi Mike,

    Thanks for posting the pinouts for the 45's. The ACS340 has a 9-pin
    connector. Functions include on-off, vol, base, trbl, LED.

    I was able to find the schematic of the power amp chip, but not for the
    whole system. Altec Lansing does not provide it.

    Having a pintout for ACS340, such as you have given would allow me to
    "hardwire" the bas/trbl to a fixed value add a switch for power (maybe pot
    for vol)

    Regards,

    RichK

    ----- Original Message -----
    From: "Michael Kennedy" <>
    Newsgroups: sci.electronics.repair
    Sent: Monday, June 12, 2006 10:07 PM
    Subject: Re: Adding subwoofer to desktop ACS340


    > I'd guess these are similar to my ASC 45's and my ACS 45.1's with the

    input
    > on the sub and the volume control on the sattelite speakers, but yours
    > having an analog control instead of digital (knob instead of push
    > buttons)... I'm not sure how the handled that but the 45's and the 45.1's
    > have a simple pinout only using 5 wires. It is a type of din connector

    that
    > looks simiar to a ps-2 mouse or keyboard connector.
    >
    > If your connector is a 5 pin connector I believe this should be the proper
    > wiring for it.
    > ~~| |~~
    > 2 / * _ * \ 3
    > 1 \ * |_| * / 4
    > \ * / 5
    > ~~~~~
    > GND
    > pin 1 speaker R
    > pin 2 speaker L
    > pin 3 speaker DOWN volume bottom
    > pin 4 speaker UP volume bottom
    > pin 5 LED Green
    >
    >
    > - Mike
    >
     
    RichK, Jun 13, 2006
    #7
  8. RichK

    RichK Guest

    "Michael A. Terrell" <> wrote in message

    > I have the two small ACS340 speakers, but not the subwoofer if the OP
    > needs them.


    E-mailed you direct, but no answer so far. You have a block on your
    Earthlink address.

    RichK
     
    RichK, Jun 15, 2006
    #8
  9. RichK wrote:
    >
    > "Michael A. Terrell" <> wrote in message
    >
    > > I have the two small ACS340 speakers, but not the subwoofer if the OP
    > > needs them.

    >
    > E-mailed you direct, but no answer so far. You have a block on your
    > Earthlink address.
    >
    > RichK



    I allowed it through, but I can't read it on this computer. I check
    the suspect folder every day, but i have a different account set up on
    this computer. I'll reply tommorow morning.


    --
    My sig file can beat up your sig file!
     
    Michael A. Terrell, Jun 16, 2006
    #9
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