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wattage question

Discussion in 'Amps and Cabs [BG]' started by grinx, Apr 1, 2003.

  1. grinx


    Mar 24, 2003
    Raleighwood, NC
    using (for now) a SWR workingman 12 combo, rated at 100w into it's 12" speaker. the literature says if i add an extension cabinet (both internal and external are 8 ohms, per maufacturers suggestions), it puts out 120w

    does that mean each speaker gets 120w, or each gets 60w?

  2. g4string

    g4string Supporting Member

    Sep 19, 2002
    Melissa, TX
    each will get 60 watts if your amp is rated 120 watts at 4 ohms.
  3. grinx


    Mar 24, 2003
    Raleighwood, NC
    so what is louder? 1 (12) at 100w. or a 12 n 10 at 60w?

    i would think the single 12.
  4. aladdin


    Mar 7, 2003
    Chiba, Japan
    Think about it. 1, 12" speaker moves an amount of air equivalent to its diameter squared. That is 144 cubic inches of air. This produces sound. 2 of those speakers moves 288 cu. inches of air. You also get about a 6dB gain from having a similar cabinet nearby. 2 will sound louder with your 120 watts. It will sound cleaner too.
  5. grinx


    Mar 24, 2003
    Raleighwood, NC
    thanks, that's what i needed to know =)
  6. If you want maximum result, try to find a extension cabinet with a particularly high sensitivity. Sensitivity is the sound pressure the cab will put out at 1 Watt, at 1 meter. A 12" that has a 99 dB sens. rating is very loud, much louder than a 96 dB one. From the 3 dB difference, you'll get a volume gain equal to doubling the amplifier power.