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Thread: Looking for a 2-way audio switch

  1. #1
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    Looking for a 2-way audio switch

    something that takes 2 stereo rca inputs and you can switch between them. My deck only has 1 set of AUX inputs, I need to be able to share between carputer and Sirius radio. Any suggestions?
    PIII-850/320M/40G + Lilliput Touchscreen

  2. #2
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    A Y-cable will "mix" the two audio sources. Or, you can get one of many source selectors. Check Radio Shack.
    2006 Chevy Colorado: VIA M10000 EDEN, 1 GB RAM, 80 GB 2.5" Seagate HDD, USB Slim Slot DVD/RW, Holux GPS, MobileVU 10.4" LCD (touch not working yet), VOOMPC Case (blue), 70W DC-DC supply.

  3. #3
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    Auxilliary input convertors....

    http://www.logjamelectronics.com/auxinpconv.html

  4. #4
    hd543211
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    Quote Originally Posted by Jackso
    A Y-cable will "mix" the two audio sources. Or, you can get one of many source selectors. Check Radio Shack.
    Can you please elaborate on the Y-cable. If one source feeding into the Y cable is off how will the HU mix the 2 sources? Thanks!

    -HD

  5. #5
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    Y-cable is not a good idea at all. Especially if you have 2 sources on at the same time. Very bad idea.
    PIII-850/320M/40G + Lilliput Touchscreen

  6. #6
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    Quote Originally Posted by Vadim
    Y-cable is not a good idea at all. Especially if you have 2 sources on at the same time. Very bad idea.
    He is right, a Y cable will not mix... you can actually damage both audio outputs by doing this (by creating a short). If you want to Mix you should use a mixer, just keep in mind that mixing increases noise (noise gets added as well as the music). I would reccomend a switch, you can build them pretty easily or buy them at radioshack.

    Good luck!

  7. #7
    What can I say? I like serial. Curiosity's Avatar
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    If your PC is always going to be on when you use the XM and you have more than 1 input on your sound card, you can use that and control it from the mixer for a more even level across all inputs. Some sound cards have extra headers on the card for aux, CD, TAD, and more.

  8. #8
    FLAC Pudge's Avatar
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    Quote Originally Posted by archimense
    Auxilliary input convertors....

    http://www.logjamelectronics.com/auxinpconv.html
    I think there is a much cheaper solution. I think the switch idea is something like the attached link, but on a smaller (and only audio) basis.
    http://www.circuitcity.com/detail.js...cfkmdffhdfgo.0
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  9. #9
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    Quote Originally Posted by Curiosity
    If your PC is always going to be on when you use the XM and you have more than 1 input on your sound card, you can use that and control it from the mixer for a more even level across all inputs. Some sound cards have extra headers on the card for aux, CD, TAD, and more.
    I was thinking about doing that, but i don't want to be dependent on the comp to be turned on to listen to sat radio. I will probably just get a 2 way switch from radio shack.
    PIII-850/320M/40G + Lilliput Touchscreen

  10. #10
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    Quote Originally Posted by Wrongway
    He is right, a Y cable will not mix... you can actually damage both audio outputs by doing this (by creating a short). If you want to Mix you should use a mixer, just keep in mind that mixing increases noise (noise gets added as well as the music). I would reccomend a switch, you can build them pretty easily or buy them at radioshack.

    Good luck!
    Actually, if it damages any equipment, you're equipment is already broken. It's all about impedance levels. Line inputs have a significantly lower impedance level than a line output, thus connecting two line outputs together to a line input doesn't cause a problem. Since current always takes the path of least resistance, the lower impedance of the input as compared to the outputs causes the current to flow in that directions as opposed to flowing into the output. If it manages to damage anything, that would suggest that your line output was already damaged and had it's impedance drastically lowered. If this were the case, any time you connected any audio device to this output, the levels would be loaded down so badly that you would never get any audio to the device that you connected.

    As far as mixers are concerned, a mixer is nothing more than a series of amplifiers with their outputs connected together (usually feeding another amplifier so that you can adjust the "master" levels).

    I will add that connecting a single output to multiple inputs (usually anything more than 4) is generally bad. This application would require that a distribution amplifier be used. This is again due to the lower impedance levels of the inputs. By paralleling many low impedance inputs you get a much lower impedance, thus sinking the current that is your audio and making it distorted. However, this is off the topic a bit because this is exactly the opposite of what we're discussing here.

    As the "creating a short" goes, since you are connecting two audio sources in PARALLELL the only way a short could be created is if one of the inputs were already a direct short.

    Since this has become incredibly long, I will stop here, and finish by adding that I have been a radio station engineer for over six years, and that connecting two outputs to a single input is done thousands of times (this is how monoing is done). If there are any other audio related questions you need the CORRECT information about, feel free to let me know.
    2006 Chevy Colorado: VIA M10000 EDEN, 1 GB RAM, 80 GB 2.5" Seagate HDD, USB Slim Slot DVD/RW, Holux GPS, MobileVU 10.4" LCD (touch not working yet), VOOMPC Case (blue), 70W DC-DC supply.

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