Impedance and Power

Discussion in 'Amps and Cabs [BG]' started by krazy_olie, Nov 1, 2004.

  1. krazy_olie


    May 10, 2004
    I'm confused about this impedance thing, not really sure what it means. If i have a 300w with a 4 ohm impedance, i assume that has to be used with something like 400w 4ohm at least, but what if you have an 8 ohm cab, greater than 300 or 600,
  2. Rhythmalism


    Sep 25, 2004
    I'm not really following... Assuming we're talking solid state amps, you can use a higher impedance cab on a given amp than recomended, you just won't use it to full potential. But putting a 4 ohm load on a head rated for 8, it's only a matter of time before meltdown happens :oops:.

    Match impedances, it keeps the heads happy. Match the power ratings for heads and cabs as close as possible. Want to make sure you get full potential used out of those cabs.
  3. IvanMike

    IvanMike Player Characters fear me... Staff Member Supporting Member

    Nov 10, 2002
    Middletown CT, USA
  4. krazy_olie


    May 10, 2004
    so if the amp is 4 ohm impedance you should use either 2 8ohm cabs or 1 4 ohm cab to get good use out of it.
  5. Petebass


    Dec 22, 2002
    QLD Australia
    That's right. Give a 4 ohm amp a 4 ohm load and you'll never have to worry about frying your amp.