Headset volume issue

Discussion in 'Computer Information' started by naza, Dec 25, 2007.

  1. naza

    naza Guest

    I have brought a 5.1 surround sound system for my PC, it all works
    fine, but before i brough it I had a set with speakers, non-amplified
    and a headset which I used for Voip and games. Because they were non-
    amplified all the volume sliders were max, jsut to get a slight
    output, which worked fine, as I mainly just used the headset. But now
    the 5.1 surround sound system has it own amplifier in it, so leaving
    the volume sliders so high is not an options as the sound gets
    clipped, and sooner or later the amplfier in the speakers will go as
    well. I have reduced the volume but now the volume of the headset is
    just too low. I have checked the settings and the headset port is set
    correctly and the ouput from that port is for headphone, not lineout.
    Is there a solution to my problem, I a headphone jack on the speakers
    but no mic. Is there some sort of external amplifier that I can use to
    increase the volume?
    naza, Dec 25, 2007
    #1
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  2. naza

    Paul Guest

    naza wrote:
    > I have brought a 5.1 surround sound system for my PC, it all works
    > fine, but before i brough it I had a set with speakers, non-amplified
    > and a headset which I used for Voip and games. Because they were non-
    > amplified all the volume sliders were max, jsut to get a slight
    > output, which worked fine, as I mainly just used the headset. But now
    > the 5.1 surround sound system has it own amplifier in it, so leaving
    > the volume sliders so high is not an options as the sound gets
    > clipped, and sooner or later the amplfier in the speakers will go as
    > well. I have reduced the volume but now the volume of the headset is
    > just too low. I have checked the settings and the headset port is set
    > correctly and the ouput from that port is for headphone, not lineout.
    > Is there a solution to my problem, I a headphone jack on the speakers
    > but no mic. Is there some sort of external amplifier that I can use to
    > increase the volume?


    I looked for "USB powered headphone amplifier" and found this.
    What is wrong with it ? No volume control. You need a separate
    volume control, so you can achieve the right balance between
    devices.

    http://www.boostaroo.com/store_detail.php4?id=11
    http://www.boostaroo.com/pdfs/T794_Owners_Manual.pdf

    There is a RadioShack version, but it runs on batteries.
    (A typical RadioShack trick to keep you enslaved, and quite
    unnecessary if you can find a good USB powered version.)

    ******* Geeky section *******
    To make a volume control, you could use a dual potentiometer.

    To start, the amplifier in the original Boostaroo is shown
    here. The TDA7050 is a small device, intended specifically
    for headphones.

    http://www.nxp.com/#/pip/pip=[pip=TDA7050_CNV_2]|pp=[v=d,t=pip,i=TDA7050_CNV_2,fi=,ps=0][0]

    You can see how NXP (Philips Semiconductor) intended to control
    the volume, here. The two 22K ohm potentiometers have a total
    of six terminals, three terminals for each channel. Basically,
    the potentiometers form attenuators, that sit in front of
    the amplifier chip.

    http://www.nxp.com/products/blockdiagrams/MSB405.gif

    This shows the same basic information as the NXP diagram. The
    right hand diagram shows the wiring for one channel of the stereo
    pair. There are two "wafers" on the dual pot, meaning there is
    room to control two channels by rotating the same potentiometer
    shaft. (I.e. It is a stereo volume control.)

    http://www.bcae1.com/images/gifs/volcont.gif

    This Radio Shack product 271-1732, is a dual volume control for
    stereo applications. Yes, it is 100K, but it will still work.

    http://www.radioshack.com/product/index.jsp?parentPage=search&summary=summary&cp=&productId=2062359

    There is a closeup of the connections on the volume control
    device here. The middle pin of the two sets-of-three, is the
    wiper contact. The outside pins are the ends of the resistance
    material.

    http://www.applefritter.com/images/pot-5443.jpg

    You would need male and female 1/8" stereo plug and jack, some
    wire, solder, soldering iron, and some help, to put all that
    stuff together, to make something useful from your boostaroo.

    ******* End Geeky bits *******

    If I could find a reasonably priced product, that didn't use
    batteries, and had a volume control, I wouldn't be reduced
    to showing you that. The problem with audiophile equipment,
    is the steep price. For example, I saw a headphone amp for
    $1000 and that isn't reasonable for anybody. But the
    people who make the cheap stuff, need to be beaten with a
    clue stick, because they miss the most important of
    details (volume control).

    I cannot expect you to solder together an attenuator, to
    make something useful from that Boosteroo, but at least
    I can demonstrate the missing bits.

    Your local stereo store may have something better to offer.
    Tell them what you want to do, that the solution must have
    a volume control, and they'll help you out. You won't get
    the solution for $50 though.

    Paul
    Paul, Dec 25, 2007
    #2
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