Results 1 to 5 of 5

Thread: how best to power my amp?

  1. #1
    Newbie
    Join Date
    Nov 2004
    Posts
    11

    how best to power my amp?

    Hey guys, well you all been great upto now, maybe you can help me one more time,

    im installing a pc in an MR2, This has a stock amp, it has no standard inputs into it, so i cannot mess with the wiring on the staock amp, and its in a really awkward place.

    I have found out how to give it power, on the harness i bought you get 4x phonon cables, if i push a signal through those and connect the red cable on the harness that should go through a HU to the blue amp remote, the amp kick in and hey presto we have wicked sound. - but it killed my battery - drained it dead!

    now..... i need to know where to cable from to enable me to get the same effect but the connection is established when either the engine is started or when i turn the key.

    Do i wire from the ignition barrell? as the wire on the harness is a permmanent live ( or seems to be) although it says IGN 12+v on the cable.

    My question --- i need to wire the remote amp cable on the harness to where ( that wont kill my battery ) not keen on using a switch as i will definately forget to switch it off.

    Please help

    cheers

  2. #2
    Low Bitrate
    Join Date
    Sep 2004
    Posts
    68
    Are you sure it is the remote turn on that drained your battery? They usually only pull like 100mA. Is it possible your alternator cannot support the extra current draw that your amp requires?

  3. #3
    Nic
    Nic is offline
    FLAC Nic's Avatar
    Join Date
    Oct 2003
    Location
    Melbourne, Australia
    Posts
    1,047
    find the acc wire from behind your headunit, then wire that to the amp
    Signature: [==||========] 20% complete

  4. #4
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
    Join Date
    Oct 2004
    Location
    NY
    Posts
    6,234
    Quote Originally Posted by justICE
    Are you sure it is the remote turn on that drained your battery? They usually only pull like 100mA. Is it possible your alternator cannot support the extra current draw that your amp requires?
    it's not the remote turn on draw that killed the battery, it's the fact that the amp stayed on because of it. you can find a ignition or accessory lead at the radio head conection or the fusebox or the ignition switch itself, but you must pay attention to the gauge of the wire feeding this amp, as I have seen some factory setups that actually power from this lead, meaning that the amp may draw 15 amps or more from this lead. if you see that there is a seperate heavier battery lead then you can power this with a 16-18 ga. wire or less with a 3 amp fuse, but if there is no other heavier seperate battery lead, then you may need to run like a 12-14 ga. with a 15 or 20a fuse...

  5. #5
    Low Bitrate
    Join Date
    Jan 2004
    Posts
    100
    you could wire the remote turn on to an unused 12V (yellow) on your psu, as such the amp will turn on whenever your computer is on, and off when the pc is off.

    Unless u are using standby, in which case you need to find out if your mobo kills 12v in standby

Similar Threads

  1. PC Power Supply and Car Amp
    By GezusK in forum Car Audio
    Replies: 6
    Last Post: 05-10-2006, 01:31 AM
  2. 12v Power Supply at MP3Car.com store
    By mykolJay in forum Power Supplies
    Replies: 6
    Last Post: 02-02-2006, 10:17 PM
  3. Sound not very loud have i bought the wrong amp
    By rickyaswell in forum Car Audio
    Replies: 7
    Last Post: 09-26-2004, 11:23 PM
  4. getting an odd motherboard to power on
    By karmann in forum Power Supplies
    Replies: 13
    Last Post: 11-28-2001, 06:27 PM
  5. HELP!! Power Supply wont supply power
    By Saab in forum General Hardware Discussion
    Replies: 3
    Last Post: 08-28-2000, 10:33 AM

Bookmarks

Posting Permissions

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