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Thread: Confused about mulitple audio inputs

  1. #1
    Newbie virengoyal's Avatar
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    Question Confused about mulitple audio inputs

    Hi Folks,

    OK, im finally done with installig the carpc in. Now i have a pioneer 7650 DEH head unit with a 4 channel sony amp. Have 4 speakers and 1 sub running.

    Now i want to know how i can connect the two audio inputs ( HU & the carpc sound card ) to the amp.

    The scenario is that my HU is always on and it powers my amp up. Unfortunately i dont have a Aux on my HU to connect to my HU., I was hoping if some one could tell me if i can connect the sound card to the amp , with my HU working also.

    Any ideas??

    Thanks

    Viren

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    Maximum Bitrate boomintrac's Avatar
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    I am not familiar with you head unit and cant find any info on it, but I have at least one option that will work. First if it is an ip bus headunit you can do one of these

    http://www.pioneerelectronics.com/pn..._35681,00.html

    If your head unit dosent support ip bus then you can do an eq with 2 inputs I would reccomend something like an audiocontrol three.1 or a four.1 both are half din units that are awesome and will give you seperate master volume control.
    The only problem with trevors idea is that you will lose all sub control from the H/U as well as fader and balance capabilities as you only have a single output that is driven. Sure you can use rca y adapters to split the signal but then you will be losing signal voltage which would lower the quality of sound being driven by the amps. Both audio control pieces would help in that department also because they have linedrivers built in to boost the signal that is driven through the rca cables so you can keep you gains on the amps down and have better sound, you also keep your balance, fader, and sub controls, and get a 3 or 4 band eq (depending on unit)
    hope this helps
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    Newbie virengoyal's Avatar
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    thanks guys,

    still wondering, what will happen to my amp if i give it two audio inputs. The problem lies in the fact that my amp turn on signal comes from the HU.

    So can u just allow my HU to turn on the amp and connect my carPC audio to my amp and run it?

    Hope this will not blow my amp or my carpc

    Any thoughts on this.

    I like the idea of the three audio in to 1 output switch pretty cool. My problem is still the amp turn on signal

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    I fail to see how the amp's turn on signal has anything to do with this problem. The amp receives a signal through a switched power wire, usually the ignition or accessory wire, not through any kind of RCA cable. Unless you have some kind of strange amp with an RCA remote wire then this shouldn't even be an issue.

    I personally think the RCA input selector is my favorite solution thus far. You can switch between audio sources and still have one left over, you could use it as an iPod cable or a way to hook any other audio/video device up in the car.

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    Newbie virengoyal's Avatar
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    thanks spoonraker. I think u are right, im new to this so my knowledge is limited.
    So to clarify here what should be possible

    1. amp is connected to the ignition switch of the car. So it turns on independetly when the car is turned on.

    2. I can definetly connect two audio sources to the amp. ( carpc + car stereo)

    Thanks again

    cheers

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    You are on the right track I would just use RCA Y splitters and send both your carPC signal and your car stereo signal to the amp. You cannot damage your amplifier by doing this.

    Your car stereo wire harness should have a (usually blue) wire called a remote wire that is designed to go to your amp. Your amp will have a place for a remote wire to connect (which is different than the 12v wire you use to power the amplifier).

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    Newbie virengoyal's Avatar
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    thanks a ton people. Im starting today. will let you know how it goes

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    FLAC Jahntassa's Avatar
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    Quote Originally Posted by tmproff View Post
    You are on the right track I would just use RCA Y splitters and send both your carPC signal and your car stereo signal to the amp. You cannot damage your amplifier by doing this.
    You won't damage your amplifier, but you'll potentially damage the outputs of either your headunit or your soundcard. Outputs are outputs, and they are NOT designed to take input signal that is not theirs. It has a lot to do with impedance and electricity.

    Sure, it may work at first, but more than likely you'll end up destroying something. If you care for more technical information, try this article: http://www.rane.com/note109.html

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    in your setup, I would recommend that you feed your car pc out into the HU, and connect the HU to the amp.

    you need one of these. http://www.pioneer.co.uk/uk/products...B20/index.html. there's also a cd-rb10.
    tbh - you may not even need the amp, if your HU is good enough. i drive my speakers thru an alpine HU, setup like this.

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