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Sub question. peak, RMS, dynamic?

Discussion in 'Subwoofers' started by Bassline@ddict, Jun 7, 2003.

  1. Bassline@ddict

    Bassline@ddict
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    Quickie on power ratings for subs. What does it mean when it says for example:

    Dynamic Power: 750 watts
    RMS Power: 300 watts

    and i've also seen

    Power Handling:
    1500 watts
    3000 watts peak power

    So my question is what does peak, RMS or dynamic power mean?

    Cheers

    Steve
     
  2. Bassline@ddict

    Bassline@ddict
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    If theres a post with this info already could u please drop a link 2 it.

    Steve
     
  3. Ian J

    Ian J
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    RMS Power is continuous whilst Peak Power is sustainable for very short bursts only. I haven't come across dynamic power but RMS Power figures are the only ones that really matters.
     
  4. mumu

    mumu
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    Er, sorry to contradict Ian J but.........

    :lesson:

    Peak power is the max power delivered when a sinusoidal waveform is at its highest value (either positive or negative), peak to peak power is the power taken across both sides of the waveform positive and negative.
    RMS is the root mean square of the waveform and is equal to 0.707 times the peak power and 0.354 times the peak to peak power (for sine waves). RMS is usually the best measure provided of a systems performance but just to confuse the issue what most manufacturers call peak power is actually the peak to peak power.

    Dynamic power is the ability to deliver large, very short duration transient pulses such as is required to convey accurately the initial very fast attack (slam) of a bass drum etc etc and in many ways is more important than RMS power (how often do you listen to a sine wave???)

    So to sum up: ignore peak power, take rms with a pinch of salt - it gives an indication of how loud a system can go - and get the most dynamic power you possibly can if you like loud music that retains accuracy without drums, bass blasts etc losing definition.

    Hope this actually makes sense, but Sunday morning is not normally a good time for coherent thought :zonked:
     
  5. Stellavision

    Stellavision
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    :clap:
     
  6. Bassline@ddict

    Bassline@ddict
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    Mumu,

    :) Excellent explanation. Just what i was after.

    Thanks 4 that.:smashin:

    Steve
     

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