It's official: British watts are more powerful than US watts

Discussion in 'Amps and Cabs' started by De Batz, Nov 20, 2017.

  1. De Batz

    De Batz Member

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    This, basically. 3rd picture for detailed view.

    Anyone got anything approaching an explanation?
     
  2. tenchijin2

    tenchijin2 Member

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    Wow, by a 2:1 ratio. Them Brits are loud.
     
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  3. swiveltung

    swiveltung Member

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    Sir James Watt was British, that's why.
     
  4. De Batz

    De Batz Member

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    Now let's not confuse matters. Watt invented horsepower. He was named after the unit for power!

    And I'm not sure he was a knight, either.

    I blame the French for inventing SI.

    :sarcasm

    Incidentally, I do that joke for the kids at school quite a bit. We also do the 'what is the unit of power' joke on a fairly frequent basis.
     
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  5. Humble Texan Fan

    Humble Texan Fan Member

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    Don't the americans typically rate theirs Programme and the brits SPL or something? Last time I bought a speaker the retailer had kindly supplied a chart comparing 3 different ratings, all conforming to some standard.
     
  6. Modulator

    Modulator Member

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    It could be the same, depends on the exchange rate.
     
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  7. frthib

    frthib Member

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    So now we have SS watts, Tubes watts, US watts and British watts. :eek:
     
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  8. CallEOD

    CallEOD Member

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    UK 230 volts > US 115 volts.

    More volts = more amperes = more watts
     
  9. De Batz

    De Batz Member

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    Whilst everything you've written is true, all other things being equal (ie resistance(s) being the same in the circuit) a doubling of p.d. ought to give 4x the power, not twice. Do we Brits crank up all the resistances of things by root 2 to compensate? ;)
     
  10. CallEOD

    CallEOD Member

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    { breaks out scientific calculator} .... This reminds me of something my Professor would have asked in Electronics school.
     
  11. rstites

    rstites Member

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    It does look like there's some sort of confusion about the fact that standard British voltage is twice standard American voltage at the outlet. However, Watts are Watts so that should be a set value.

    Now, maybe it has to do with effective current handling ability as 30 W at 115 V would require double the current of 30 W at 230 V. That could explain it.
     
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  12. Seth L

    Seth L Member

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    As far as I can tell, the British rate watts with a completely distortion free sound. Americans, not so much.
     
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  13. ducker 1

    ducker 1 Member

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    tell this to my M100--loud beyond loud
     
  14. davidespinosa

    davidespinosa Supporting Member

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  15. Theorist

    Theorist Supporting Member

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    Nowadays it’s more like: “turn cellphone sideways “...
     
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  16. Trebor Renkluaf

    Trebor Renkluaf I was hit by a parked car, what's your excuse? Silver Supporting Member

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    RMS vs. peak.
    If you take Ohms law: E = SQRT(P * R), punch in 30 for P (watts peak) and 8 for R (resistance) you get 14.49 volts peak.
    Now convert that to RMS and you get 10.95 V RMS.
    Now use ohms law to calculate the power. P = E^2/R and your get P = (10.95^2)/8 = 14.98 watts RMS.
     
    Last edited: Nov 20, 2017
  17. Trebor Renkluaf

    Trebor Renkluaf I was hit by a parked car, what's your excuse? Silver Supporting Member

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    You didn't learn about Peak vs. RMS in electronics school?
     
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  18. DMVGuitar

    DMVGuitar Member

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    Watts a matter you?
     
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  19. eclecticsynergy

    eclecticsynergy Member

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    Alma mater of Rocky the Flying Squirrel.
     
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  20. jdel77

    jdel77 Supporting Member

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