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Thread: Need some help with the DIY tablet audio setup (indash)

  1. #1
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    Need some help with the DIY tablet audio setup (indash)

    Hey everyone.

    So I'm doing an indash tablet install on my 2005 Xterra. I have a worklog going HERE. I'm at the portion of the project where I need to do the audio hook ups.

    Previously I was looking at doing this:

    3.5mm Jack split to RCA > each RCA split into 2 groups. (channels 1,3 & 2,4 would be the same signal). > pipe all 4 into the low level inputs on the 4 channel amplifier I bought.

    Today with the help of some good friends I learned that the 3.5mm jack is actually a high level output, so that setup would be high level with to many splits piping into low level.

    Now I don't know what to do. How should I get the high level output from the Tablet to the amp? Splice the 3.5mm jack wire? Is there some sort of audio product other than an amplifier that will take the audio signal and send it out to the speakers?

    Should I buy an amp that only has high level input hook up instead?

    Really confused, hoping to get some answers.

    Thanks.

    LaRue

  2. #2
    MySQL Error soundman98's Avatar
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    no, your original setup is correct, your friends are wrong. nothing with a 3.5mm jack outputs high level audio-- because the audio chipsets driving the 3.5mm jacks never have any sort of real amplification, just a very basic one-- normally enough for headphones, but never enough to drive a real speaker system.

  3. #3
    Raw Wave
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    Maybe they mean high impedance level - ie, LOW current? (IE - matched to typical "high impedance" inputs of typically 10kOhms that expect up to a few volts.)

    The other option is usually for headphones - eg, 8-16 Ohm output (which even if as much as 1W means 4 volts or less). It's usually best using an impedance matcher for those if the output is too low or too bassy, I usually use small 8:1k etc audio/signal transformers in such cases.


    IMO both are "low level" signals.

  4. #4
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    would a standard equalizer work then? Something like THIS

  5. #5
    MySQL Error soundman98's Avatar
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    yes that will work. i like to recommend to put a eq in the audio path simply so you have a easier time tuning the sound system then connecting directly to the amps, but either method would work fine.

  6. #6
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    If you do use the Clarion, can you let me know how well it works if you were to set the Clarion and then use the tablet as your main volume control? I have steering wheel controls but have no where to mount this except hidden somewhere. The Clarion is perfect for me except I have no way to control its audio output digitally.

  7. #7
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    I've used that Clarion EQ in two different setups now. In the first setup, I placed it where the headunit used to be and ran my phone to the EQ and EQ to amplifier. I left the phone at full volume and controlled everything from the EQ.

    In my current setup, I have a JVC headunit that runs to the EQ and that runs to the amp. The EQ has 2 inputs however, so I also run a headphone jack to the second set of inputs.

  8. #8
    Constant Bitrate
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    I bought one of those clarion units after reading all the reviews. It really sounded like a good unit. After I got it installed, I noticed a fatal flaw. The equalizer controls affect the subwoofer out. In other words, turning the 53Hz and 120Hz control down to prevent reduce the low frequencies from getting to your smaller speakers, reduces the output of the sub outputs. IMO a sub out should be seperately split out and filtered to be a true sub out. The sub out signal should not be run through the equalizer section. This is done internally, and there is nothing we can do about it, short of hacking the thing up.

    I would say overall it's a decent unit. It has good features. I just wish the sub out was not run through the equalizer.

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