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Thread: Powering Carputer and amp ...

  1. #1
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    Powering Carputer and amp ...

    okay ... I have alot of quetions ...

    so i want my carputer up and running before I go back to school on the 14th of august. So- I'm starting to think heavily about getting everything set up. First issue that comes to mind is running my system headless ... I figure just run all of my speakers from an amp and my amp connected to the computer as a source. next is powering both the amp and the carputer. I'm going to have a Mac Mini setup so i'm using the Carnetix p1900 i believe it's called ... I'm going to have a line running from that and a line running from my amp to a distributor block and then from the block to my battery. I plan on having a fuse on every line going in and coming out of the distributor block, as well as a fuse on both lines of the p1900 (one going to the screen and one going ot the mini) ... so my question is ... is there ever too many fuses on a line? Should I only have a fuse in certain spots?


    Diagram of what I'm trying to do, just ignore the periods- it's to make the lines line up correctly:

    Battery(+)---(fuse)-----[distributor]-----(fuse)---[PSU]---(fuse)---[macmini]
    ........................................1
    ........................................1
    ........................................1
    ........................................1
    .....................................(fuse)
    ........................................1
    ........................................1
    ........................................1
    .....................................[Amp]

    also- i'm not sure if this is a good place to ask this but i'll go ahead ... when using an amp a 2 channel amp can power all four speakers right? so if I was going to up my front speakers to components and my amp to a four channel could i run the components like a single speaker? meaning left tweeter and speaker are just one (left) and the right tweeter and speaker are one (right)?

    thanks for the help

    Michael
    Mazda 3, meet Mac Mini. Mac Mini, meet Mazda 3.
    Mac Mini in-car coming soon.
    Progress: [||||||||||||||||||--] (90% Complete,Initial install is complete, now adding on and fine tuning.)
    Progress Blog: http://mikemazda3.blogspot.com/

  2. #2
    Maximum Bitrate binary.h4x's Avatar
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    fuses are good, but they are better when they are close to the power source. IE. I wouldn't put the fuses halfway between your power lines as shown in your diagram. An easy fix for the distribution block and the fuses would be a fused distro block. Like this one...
    2007 Honda Fit Sport 1.5L SOHC-VTEC

  3. #3
    Constant Bitrate seanshine's Avatar
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    Quote Originally Posted by TxMazda3
    so my question is ... is there ever too many fuses on a line? Should I only have a fuse in certain spots?

    when using an amp a 2 channel amp can power all four speakers right? so if I was going to up my front speakers to components and my amp to a four channel could i run the components like a single speaker? meaning left tweeter and speaker are just one (left) and the right tweeter and speaker are one (right)?
    You can have as many fuses as you want,although you probably don't need that many.I'd put one from the battery to the distribution block,and one for the power to the lcd.(depends on how you wire the power for it;i.e. from a molex on the power supply,or from the distribution block)
    Whichever you choose,just make sure they're accessible and easy to change.

    A 2 channel amp can generally power 4 speakers,the caveat being that you need to check the speakers' impedance if you wire them in parallel so that you don't overload the amp,and realize that you can't fade between front and rear.
    Component speakers (seperate woofer and tweeter) act as one speaker.
    Using a 4 channel,or even a 5 is the way to go if you want a single amp that can power front,rear,(and fade between front and rear)and a sub.
    Any sufficiently advanced technology is indistinguishable from magic - Arthur C. Clarke

  4. #4
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    Thank you guys so much. Y'all have been a huge help

    Michael
    Mazda 3, meet Mac Mini. Mac Mini, meet Mazda 3.
    Mac Mini in-car coming soon.
    Progress: [||||||||||||||||||--] (90% Complete,Initial install is complete, now adding on and fine tuning.)
    Progress Blog: http://mikemazda3.blogspot.com/

  5. #5
    Constant Bitrate Willy-Mach1's Avatar
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    I just upgraded from a 2ch amp to a 4ch amp and the difference is huge....a lot more control on the speakers....i have to say that 4ch or higher is the way to go
    Progress: |##########| 99.99%
    - Tweaking and enjoying!!!! Never really done.....


    -= MachPuter Project =-
    -= MachPuter Project Worklog=-

  6. #6
    Maximum Bitrate d_sellers1's Avatar
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    Go with a fuse within 12 inches (18 inches??) of the battery and a fused distribution block. You can go with the one posted above which uses one fuse for all or something like what I use. It takes a 2/4-gauge wire and distributes it to a 4/8-ga and 3 8-ga connections. It also has a voltage display on it.

    Link here

    Also, if you don't have the amp yet, I would recommend going with the 4-ch amp. They're not too much more than a 2-ch amp and sometimes are cheaper. Remember, too, that you don't need a whole lot of power to drive regular speakers.

    Derek
    Progress [||-------]
    View my Worklog to see some of my progress.
    Downgraded Progress - Starting with another car... 09/13/06

  7. #7
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    Well- I believe I've decided on my amp- I'm going with a Profile AP-1040. It's a 4-Ch pushing 80W per ch. Gonna cost me about $100 on ebay and users on Crutchfield rated it well. Everything else is moving along nicely. I'm researching and reading a book I picked up at Barnes and Noble, Geek My Ride. It's helping and I don't have to come running to you guys with every little questions. So- thank y'all for your response. I can't wait to get my carputer up and running.
    Mazda 3, meet Mac Mini. Mac Mini, meet Mazda 3.
    Mac Mini in-car coming soon.
    Progress: [||||||||||||||||||--] (90% Complete,Initial install is complete, now adding on and fine tuning.)
    Progress Blog: http://mikemazda3.blogspot.com/

  8. #8
    Maximum Bitrate d_sellers1's Avatar
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    Didn't some of the guys around here submit info for that book or is that another one? (time to go searching)

    Derek
    Progress [||-------]
    View my Worklog to see some of my progress.
    Downgraded Progress - Starting with another car... 09/13/06

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