Closed Thread
Results 1 to 6 of 6

Reload Thread: +12V straight from batt or Stereo

  1. #1
    2001M's Avatar
    2001M is offline Junior Member



    Join Date
    Sep 2007
    Location
    Atascadero, CA.
    Posts
    3
    Post Thanks / Like
    Mentioned
    0 Post(s)

    +12V straight from batt or Stereo

    Not entirely experienced in amps and setting them up, but i needed to ask this before i go ahead. I don't want to bother running a wire straight to the battery to power up an amp and would wish to run it (share it) with the +12V Batt wire that the car stereo is using, Is it safe to do this? will the amp run good off of this? and if i must have it straight to the battery, do i require using a fuse in between the cable, from the amp to the batt.?







  2. #2
    PurposeSoap's Avatar
    PurposeSoap is offline Swollen Member



    Join Date
    Sep 2004
    Location
    N.Colorado
    Posts
    112
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: +12V straight from batt or Stereo

    run a powerwire from the battery with a fuse like you said.. ..... I think you knew that already




  3. #3
    bk12321's Avatar
    bk12321 is offline CarAudio.com Veteran



    Join Date
    Nov 2005
    Location
    Greensboro, NC
    Posts
    3,432
    Post Thanks / Like
    Images
    15
    Mentioned
    0 Post(s)

    Re: +12V straight from batt or Stereo

    well take into consideration the fact that it is 22 gauge wire (which is most likely what the +12v wire is on your stereo)

    even if you could wire it up from your stereo instead of from the battery, that small of wire could only carry <18 watts of power wired at 4 ohms... less if wired to a lower impedance

    if u have a system running off <18 watts then i feel sorry for u

    it might be slightly bigger than 22 gauge, and if so ur still looking at around <50 watts that the wire is capable of transmitting.



    References


    '02 Nissan Maxima
    Eclipse CD5000
    Directed D2400@1
    2xSWR-1242D


    Drpdmazda (aka Jason) = SCAMMER



  4. #4
    bk12321's Avatar
    bk12321 is offline CarAudio.com Veteran



    Join Date
    Nov 2005
    Location
    Greensboro, NC
    Posts
    3,432
    Post Thanks / Like
    Images
    15
    Mentioned
    0 Post(s)

    Re: +12V straight from batt or Stereo

    and yes u fuse within about 6 inches from the battery to the fuse holder itself, ie. pretty close to the battery



    References


    '02 Nissan Maxima
    Eclipse CD5000
    Directed D2400@1
    2xSWR-1242D


    Drpdmazda (aka Jason) = SCAMMER



  5. #5
    2001M's Avatar
    2001M is offline Junior Member

    Threadstarter


    Join Date
    Sep 2007
    Location
    Atascadero, CA.
    Posts
    3
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: +12V straight from batt or Stereo

    ok, i'll hook it up straight to the battery. Do all amplifiers use the same type of fuse (amperage) wise? or do they vary by power output? This is sort of a small amp i'm gonna hook up 450Wpeak, 150Wrmsx1@4homs. this is intended for 1 single sub.




  6. #6
    bk12321's Avatar
    bk12321 is offline CarAudio.com Veteran



    Join Date
    Nov 2005
    Location
    Greensboro, NC
    Posts
    3,432
    Post Thanks / Like
    Images
    15
    Mentioned
    0 Post(s)

    Re: +12V straight from batt or Stereo

    Quote Originally Posted by 2001M View Post
    ok, i'll hook it up straight to the battery. Do all amplifiers use the same type of fuse (amperage) wise? or do they vary by power output? This is sort of a small amp i'm gonna hook up 450Wpeak, 150Wrmsx1@4homs. this is intended for 1 single sub.
    you want to fuse to the maximum amperage of the wire u are using ie. if using TRUE 4 gauge for power/ground then u want to use about a 140 amp fuse or so. if you are only using a 150w rms amp then u probably are using 8 gauge for your power/ground and therefore i would use around a 60amp fuse, if indeed u are using 8 gauge wire.

    also, you might have an onboard fuse on your amp which you dont want to get confused with the fuse u run near ur battery.



    References


    '02 Nissan Maxima
    Eclipse CD5000
    Directed D2400@1
    2xSWR-1242D


    Drpdmazda (aka Jason) = SCAMMER



Closed Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts
1e2 Forum