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Thread: Taking the amp out of a head unit

  1. #1
    Constant Bitrate bl3nd3r's Avatar
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    Taking the amp out of a head unit

    I am working on putting my Car PC in and was looking at different options to amplify the sound. I was looking over at 41hz.com at the AMP9 but see that the price is similar to a few decent head-units I had bought in the past. Plus I would need to install all the components on the board of the AMP9.

    My question is, would it be possible to take an old head-unit and remove the amplifier from it? It seems like the board with the components would be small enough and that it would be a very cheap alternative.

  2. #2
    MySQL Error scott_fx's Avatar
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    this was recently posted:
    http://www.si5.com/products.php?pID=4038

    probably a easier alternative
    New System in progress:
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  3. #3
    Constant Bitrate bl3nd3r's Avatar
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    Quote Originally Posted by scott_fx View Post
    this was recently posted:
    http://www.si5.com/products.php?pID=4038

    probably a easier alternative
    The problem with this is that it is just as expensive as the AMP9. I was hoping to be able to take something out of a head unit I already had or go to a local scrap yard and pick up some for cheap.

  4. #4
    Constant Bitrate
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    It is very unlikely you will be able to take specific parts out of your head unit to amplify things from your PC. You would need to know a lot about the head unit, as well as a lot about electronics.
    There are not too many diagrams as to what is what in specific head units that you can reference.

    I would say go with the link posted above. It isn't as expensive as the AMP9. The AMP9 is around $100 USD, while the item above is only like $75.

    I will probably get one of those myself until I have money to get a real amp and some real speakers.

  5. #5
    MySQL Error scott_fx's Avatar
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    Quote Originally Posted by bl3nd3r View Post
    The problem with this is that it is just as expensive as the AMP9. I was hoping to be able to take something out of a head unit I already had or go to a local scrap yard and pick up some for cheap.
    I just picked up one of these to experiment with and replace my dared mp5 amp at work (so i can take it home)
    http://www.partsexpress.com/pe/showd...number=300-958

    on sale for $50
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  6. #6
    Maximum Bitrate stonestatue's Avatar
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    Is it possible to put two of these sound cards in a carputer for four channels, or can four channels be used on just one?
    Check out my GMC Savana worklog.

    Remaining tasks to facilitate vanputer installation codename "Enterprise":
    - Edit skin to liking.
    - Get compatible phone for mobilephone.net.
    - Facilitate HVAC control.

  7. #7
    MySQL Error scott_fx's Avatar
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    you should use two.

    also just found this:
    http://cgi.ebay.com/ws/eBayISAPI.dll...S%252BI%252BSS

    is another cheap alternative that can probably be powered of an m2-atx psu
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  8. #8
    Maximum Bitrate FusionFanatic's Avatar
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    those mini-amps/amp-cards are fine for home computer usage, but will be useless in a car. they're simply not powerful enough. 10-15w will not even match a modern factory radio (if a factory radio can outperform something then you know it's bad!)

    unless you're an electronics genius, I doubt you would be able to simply remove the amp from a head unit since it's integrated into the main circuitboard. but you could remove all the "guts" from the HU, remove the CD player mechanisms and mount the main circuitboard (and any other components necessary for the HU to operate) inside your PC case. IMO, this would not be worth the effort but I'm just giving you some ideas.

    if you want to use a HU to amp your speakers then just keep the HU in tact and mount it in the glove box, under the dash, under a seat, etc. you don't have to take a HU apart to keep using it, just hide it somewhere

  9. #9
    Constant Bitrate
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    Quote Originally Posted by FusionFanatic View Post
    if you want to use a HU to amp your speakers then just keep the HU in tact and mount it in the glove box, under the dash, under a seat, etc. you don't have to take a HU apart to keep using it, just hide it somewhere
    This would be weird to adjust to. He would have to set his volume on his head unit to a fixed position. I think it would either limit his total output (volume on medium), or it would sound really static-like (high volume on head unit, and low volume on PC).


    Just get an amp. If you cannot afford an amp..then think about abandoning the car PC idea and just get a regular head unit.

  10. #10
    Maximum Bitrate JimmyFitz's Avatar
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    Assembled amp

    http://www.davidnavone.com/cart.asp?24&cat=5

    (scroll down some, it is the fourth item listed)

    20 X 20 STEREO AMPLIFIERS
    AMP-100 $39.99


    This little power amplifier was designed for boosting the low
    signal outputs of MP3 Players, IPODs, etd. up to speaker level.
    ~Jimmy

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