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Thread: perfect sound with an invertor

  1. #1
    Constant Bitrate
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    Post perfect sound with an invertor

    Im just wondered how people have managed to get perfect sounds when using an invertor, getting rid of noise.

    I know earthing the Power supply can do it
    So can using a ground loop isolator and a low pass filter / active crossover..

    Any other ways?

    jose http://oacar.mp3car.com http://faq.mp3car.com
    John McLear - [email protected]
    http://www.205oc.co.uk
    UK Mp3car slapnut
    #mp3car - Efnet
    Carplayer and Mediaengine *****
    spank gemma.co.uk for holding my motherboard for so long. still no board, wood work nearly done :|
    [-----------(90%)----] Completed :)
    pics at: http://www.zcentric.com/~mitcht/gall...me=Convertable

  2. #2
    Live and Kickin'
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    Dec 2000
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    Post

    I have an inverter and also clear audio!

    I just grounded everything and the noise was gone.

  3. #3
    Newbie
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    Aug 2000
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    Oregon
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    Post

    GROUND LOOP ISOLATOR

    Get one now.

    I've NEVER heard an inverter noise after running one of these in the line. Power line filters are crap too. Get a GLI.

  4. #4
    Variable Bitrate
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    Sep 1999
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    Yarmouth NS, Canada
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    Post

    I think im one of the few people that used an inverter (and always have) and have never had a problem with noise with it. Its a statpower ProWattz 150watt inverter, and it works great.. NEVER have had any noise.. It was a bit more expensive but it works perfectly.

    Now, I used a Statpower PortaWattz 1400watt inverter for a bit in the middle and it buzzed like hell until I grounded it.. but it was a much cheaper inverter.. The quality really matters.

    Of course I would prefer to move to a DC-DC supply at some point, but the inverter does work perfectly well if you don't want to go that route.
    MP3 Cavalier - http://www.mp3cavalier.com
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  5. #5
    FLAC
    Join Date
    Jan 2001
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    1,612

    Post

    when i was testing saturday i had absolutely no inverter noise, over a pair of headphones.

    i Haven't had a chance to check it out with the tape adapter

    only time will tell

  6. #6
    Variable Bitrate
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    Feb 2001
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    louisville,ky,usa
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    Post

    headphones won't do it, as you don't have a ground loop using headphones.. the grounloop is created when the computer and the radio are connected.

    anyway. I have GLI and it helps, but the PSU or Case has to be grounded (i use the same cround point as the inverter and amp) for it to be crystal clear. Plus my sound card has a Signal to Noise of 90 dB... that helps.
    I cheat, I own an empeg.
    Meskimen's Law: There's never time to do it right, but there's always time to do it over.
    http://civic.mp3car.com

  7. #7
    Constant Bitrate
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    Post

    okey let me rephrase
    If you guys are using tape adapters and the like you wont hardly notice it.

    My Sound goes straight into my amps

    --<=
    jack - 2x rca
    then it goes to gli

    its when i have both amps plugged in i get an buzzing

    if one of em is plugged in its fine.

    And if the jack aint in the PC again its fine, weird eh

    John McLear - [email protected]
    http://www.205oc.co.uk
    UK Mp3car slapnut
    #mp3car - Efnet
    Carplayer and Mediaengine *****
    spank gemma.co.uk for holding my motherboard for so long. still no board, wood work nearly done :|
    [-----------(90%)----] Completed :)
    pics at: http://www.zcentric.com/~mitcht/gall...me=Convertable

  8. #8
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    Feb 2001
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    Cottonwood, AZ USA
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    Post

    I use an inverter and a tape adaptor, I have no inverter noise, when the computer is on, but when the computer is off, I get a ticking sound that is from my engine (i.e. I give more gas faster ticking)
    --BLK
    Wide awake
    and keeping distance from my soul - Tool

  9. #9
    Maximum Bitrate
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    Mar 2001
    Location
    Cincinnati, OH USA
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    Smile

    I use an inverter and a tape adaptor, I have no inverter noise, when the computer is on, but when the computer is off, I get a ticking sound that is from my engine (i.e. I give more gas faster ticking)
    I had the same problem with tape adapters. Only I had a high pitched noise and it got higher with the amount of RPMs. The only thing I could figure is that when the engine's RPMs increase so does the alternators output (ie.. step on the gas and more power is generated), and that power is going to the source of your music, (computer, cd player w/cig lighter plug, etc..) and then into your stereo. That noise totally stopped when I got a FM modulator. I highly recommend using one if you dont have audio inputs for your stereo. (BTW I am using it for a portable CD player right now)

    As for inverter noise I don't have my computer installed nor do I have an inverter yet. But I have planned the whole grounding situation out. When I built the computer case (check it out and tell me what you think) I added a bannana plug input and wired the hard drive, motherboard, and power supply to it. So when I go to install I just have to plug in the bannana plug that has been grounded to the cars body. And since the inverters ground will be attached to the body I shouldn't have a problem. If I do then GLI all the way!

    BTW Jose I just noticed our member numbers 1339 and 1338. Cool
    http://www.mp3car.com/usersites/Maveric/ M.A.V.I.C. System
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  10. #10
    Newbie
    Join Date
    Nov 2000
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    Ventura, California, USA
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    Post

    A guy by the name of BJ talks about removing the "phase correction capacitors" from a standard 110/220 PSU to remove noise, his website is at http://home.primus.com.au/bravo/
    this info is on his "Projects" page under the link "BJBlaster car MP3 Player" then the "Power Supply" link. Have not tried this yet, but it seem's reasonable.

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