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Thread: How to integrate HU & Speakers with PC+AMP - totaly lost

  1. #11
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    David88vert, thanks for the link.
    MatixPC, I hear ya, my GM/Olds dealer did not know what I was talking about, he sent me to a local shop that does installation work for the dealer, the guy at shop was installing a DVD player to a minivan that did not have AUX-IN, he was using FM Mod!!!!!! to interface the player to the HU. Go figure.

  2. #12
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    I am using FM mod in a 97 Suburban, It works great. The OEM HU does speed controled volume adjustment. By using the FM mod that feature still works.
    No loss of quality.
    TruckinMP3
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  3. #13
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    agreed, FM modulation has a seriously bad reputation on this board which surprises the hell out of me, considering its a board of MP3 users.

  4. #14
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    OK, the last two posts put me back to square one, I was under the impression that FM mod is bad that is why I am going through the hassles of tapping into my HU.

  5. #15
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    MP3 is bad, it degenerates the audio quality of a CD for the exclusive benefit of saving hard drive space.

    But you still listen to them.

    there is nothing wrong with FM modulators whatsoever. you might hear a difference if you have a hi-fi stereo in your car, listening to a low noise source well recorded and stored.

    the noise floor alone in a car is just too rediculous to even consider an FM modulator a bad choice to play MP3's or DVD's.

  6. #16
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Quote Originally Posted by WhiteRabbit
    SNIP

    there is nothing wrong with FM modulators whatsoever. SNIP
    Depends on the quality and if it is 'Wired' or 'Broadcast'
    The broadcast models do not need to connect to your antenna and your head unit, making them more portable at the expense of quality (my experiance)

    The wired units plug into your head unit between the back of the HU and the antenna meaning much less signal loss because it is a direct connection for the wires.

    The 'purest' types will say you need Line in on the HU. That is better, one less device. My Toyota has a HU like that, the Chevy got to keep the OEM HU and use an audiovox modulator (wired). They sound the same to me ;0

    Hope that helps.
    TruckinMP3
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  7. #17
    Variable Bitrate lawrence's Avatar
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    check with a junk yard as to how much to upgrade your head unit to one with a changer input and get a cd changer adpter. fm mod are bad--- does not have freqency range of a cd input. also chck with car stero ships for take out units

  8. #18
    Newbie w5lee's Avatar
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    Quick question for ya? Is your Cassette tape built into your head unit or is it mounted in a different location? My headunit has a built in CD and a button to either activate a Tape player or CD changer. I got an gm tape player from ebay stuck a tape in it and cut the audio output wires and spliced in my mp3 player input. You just have to keep a tape in there all the time and it works great. If your tape player is external this should work for you, that is if you don't use your tape player for anything (if you do I guess you could install a switch). Hope this helps. There are aux input adapters for certain GM head units the people at www.pie.net may be able to help sort out all of the options. As far as rf mod go yuck! Poor FM quality compaired to CD...I know I can hear the difference between FM radio and CD even in a car.
    Lee

  9. #19
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Quote Originally Posted by w5lee
    SNIP
    As far as rf mod go yuck! Poor FM quality compaired to CD...I know I can hear the difference between FM radio and CD even in a car.
    Sure compare radio and FM.... That is not the right way to look at it. The 'Wired' signal goes from your audio source (MP3 which is already degraded but a different topic) into your HU no distance in the transmission.

    Quote Originally Posted by lawrence
    SNIP
    fm mod are bad--- does not have freqency range of a cd input. SNIP
    Right are you speaking from experiance or just parroting others views?

    I just got done explaining the line in on the HU in my Toyota and the wired FM modulator in the Chevy sound the same. I even installed it myself

    Are you justifying your own expendatures or getting this guy to spend more money?
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

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  10. #20
    Newbie w5lee's Avatar
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    I don't think my anology is flawed at all. A fm modulater is exactly that. It takes your output of your mp3 player/cd changer/whatever and converts it into an FM "radio" signal which your head unit then received on a portion of your fm dial which hopefully isn't crouded with other stations ( I know it is adjustable but in major cities the dial is full). You are correct that the signal doesn't have to travel very far but that doesn't really matter as long as you have a good signal you shouldn't have any static no matter if the signal is 1 foot away or 10 miles no difference would be heard.
    So back to my statement FM compaired to CD...That is exactly what you are doing given that your input is CD quality that is what a aux input will give you. If you use a modulator and give it CD quality input you will hear FM quality no better. Cost for both routes should be about the same but IMHO one does not compair with the other.
    Lee

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