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Question on amp impedance/watts to match new cab

Discussion in 'Amps [BG]' started by LyonsBass, Feb 5, 2013.


  1. LyonsBass

    LyonsBass

    Joined:
    Mar 31, 2007
    Location:
    Melbourne, Australia
    So I`ve done the Ohms FAQ readthrough but i`m yet to find some solid solution to the question I`ve been wondering.

    Firstly,if my AMP is 450watts at 4Ohms

    Does that mean any other cabinet I connect up to it that runs on 8ohms will draw 225watts due to resistance?

    Secondly, I have a 600watt cab at 8 Ohms, does this mean that I have only been getting 225 watts power from the amp?

    And if this logic is correct, I am safe to assume that I can get a new 300watt cab at 8 ohms, and push it fairly hard since I will only be getting 225 watts in total?

    If this is all pretty much accurate, I should be able to run my 600w + 300w cabs through the 450watt amp for maximum power and volume efficiency. :bassist:

    Cheers
     
  2. bassmeknik

    bassmeknik

    Joined:
    Nov 6, 2009
    Location:
    Fair Haven, MI
    Yes, yes, and yes. As long as BOTH cabs are 8 ohm cabs you can use both together and the amp will be operating with a 4 ohm load.

    With an 8 ohm load your amp will only be able to push 225(ish) watts. With a 4 ohm load (one 4 ohm cab or a combination of cabs that equal 4 ohms, such as 2-8 ohm cabs) your amp will be able to reach its maximum potential.
     

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