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adding Subs to a BMW

Discussion in 'Motors' started by stig, 13 Jul 2006.

  1. stig


    Joined: 30 Aug 2005

    Posts: 396

    Location: The M of K

    basically my car has the Logic 7 option which has two subwoofers under the seats, i want to put another one in the boot, i took out the idrive console and had a look but theres only two outputs , i was wondering if its ok to just put the third sub in parellel or will this not work?

  2. Rilot


    Joined: 18 Oct 2002

    Posts: 20,669

    Location: Wargrave, UK

    Not a good idea. You will lower the overall impedance of the circuit which may blow the amp.

    Best thing to do is get a prefessional HiFi fitter to have a look at the circuit. My old 540i with the DSP hifi was a nightmare to upgrade and I expect that the Logic7 is along the same lines but more complicated.
  3. 50/50


    Joined: 24 Jul 2003

    Posts: 2,585

    There isnt much point. Saloon boots are really bad for bass acoustics, so you will get little or no bass into the cabin.
  4. Scrutinize


    Joined: 4 Apr 2003

    Posts: 7,656

    My local ice shop had an M3 as their demo car for a while. Took 2 x 12" seriously expensive and powerful subs and equally expensive amps to get a good sound. Pretty sure they used diamonds.
  5. TomO


    Joined: 28 Oct 2002

    Posts: 3,304

    i wouldnt say no point though.

    mine are in a custom box that hangs under the parcel shelf. being a saloon the parcel shelf is obviously metal, which is sturdy and can support the weight.