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Thread: G4 digital audio mac and my BOSS CH350 help

  1. #1
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    G4 digital audio mac and my BOSS CH350 help

    Greetings from macmod. I'm trying to get my iCar project finished but im in a bit of a pickel with the audio. I'm not getting any output from the amp. I have the amp wired up correctly and im using a RCA to a speaker jack like cable for the mac's speaker jack and nothing happens. I tryed using my iPod with out the mac hooked up and nothing works still. I'm starting to think I need a preamp for this. Can anyone give me a idea to ovecome this problem?
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  2. #2
    FLAC sdashiki's Avatar
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    tell us your wiring set up a little more.

    you have the mac mini connected thru the LINE-OUT 1/8" jack with:

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    which is connected to an amp...

    and you are getting no sound.

    have you tried using headphones on the LINE-OUT of the mini to see if it is the first problem in the chain?
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  3. #3
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    also, have you definatly rigged up the amp switching cable (usually the blue wire from the headunit) which turns the amp on when the h/u in turned on?

  4. #4
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    Ok, this system isn't a mac mini it is a older G4 desktop Digital Audio (733MHz).


    That picture from sdashiki is correct from what I'm using. The wiring setup is easy.

    No stereo in the car. I have a universal cd player wire harness and using it to power the LCD. I have speaker wire running from the speaker connections on the wire harness under the floor/rug in the car to the trunk where the amp is located. Each speaker is connected to a channel. For power im using two 4 gauge wires for power and ground. The power is going fom under the backseat though a wire gomit then under the car to the engine bay then to the battery. The ground is connected to a bolt under the seat. For the remote power I have a 16 gauge wire running from the amp to the LCD's ignition power, this way the amp turns on when the car is in accessory or when the engine is running. Then fom the amp to the G4 I have that RCA headphone cable going into the audio out port.
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  5. #5
    FLAC sdashiki's Avatar
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    so, did you try the headphone test to see if the line-out on the G4 actually works?

    you need to narrow down the problem, i really didnt need to know how you wired your whole system, just the audio portion from the mac to the amp.

    the 1/8" to RCA wire should be all you need, plus maybe some Y splitters if you have multiple channels/amps.

    if there IS sound thru headphones connected to the mac, youll need to find either another 1/8" to RCA wire to test, and then youd need another known to work sound source, like an iPod.

    use the 1/8" to RCA wire from a headphone jack on a portable music player, hook that to your amp and check.

    when all else fails, are you sure the amp is on?
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  6. #6
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    Well I got it working. Come to find out I already had a amp in the car from the old stereo and since the old deck was gone the stock amp wasn't getting power and no output was made for the speakers. I found the old wireing for the speakers and cliped them from the old amp and spliced in the new wire I already ran before. So far I have done the rear speakers and they work great.
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  7. #7
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    I was going to suggest you check to make sure you were getting power to the amp. Glad you got it working.
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