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What does program mean???

Discussion in 'Amps and Cabs [BG]' started by ldiezman, Oct 5, 2001.

  1. Oct 5, 2001 #1
    ldiezman

    ldiezman

    Jul 11, 2001
    Nashville
    I understand what RMS wattage is but why do speaker cabs say 350 watts RMS and then beside it or something they will say 650 Program.. Also are most cabs 2ohm cabinets??? or 4ohms.. or does it depend... I'm not a huge expert in amplification... thanks.
    Jim
     
  2. Oct 5, 2001 #2
    brianrost

    brianrost Gold Supporting Member

    Apr 26, 2000
    Boston, Taxachusetts
    It means the cabinet can sustain continuous signal up to 350 watts and small peaks up to 650 watts. Since music is not continuous tones (usually :) ) It means you could drive this cab safely with a 650 watt amp as long as you make sure you're not clipping the amp.

    As for your other question, the most comon impedance for a SINGLE speaker is 8 ohms. This is why most cabinets that have two drivers are 4 ohm. Through the magic of series/parallel wiring, you can take four 8 ohm drivers and still get an 8 ohm cabinet...this is why many 2-10 cabs are 4 ohms while many 4-10 cabs are 8 ohms.

    I've never seen a 2 ohm cabinet, ever. Amps that can drive 2 ohm loads are designed to drive a pair of 4 ohm cabs (example: Ampeg SVT).
     
  3. Oct 5, 2001 #3
    danny3k

    danny3k Guest

    May 26, 2001
    Aguadilla, Puerto Rico
    Here's my question, I'm using a SVT3 PRO with a SVT410HLF, the head pushes 450W into 4 ohms, the cab handles 400W RMS 800W Program, Can I play some rock that's the most continuous that I can imagine, at 450W with the cab??

    DTG
     
  4. Oct 5, 2001 #4
    lo-end

    lo-end

    Jun 15, 2001
    PA
    yup.
     
  5. Oct 5, 2001 #5
    danny3k

    danny3k Guest

    May 26, 2001
    Aguadilla, Puerto Rico
    hehe thanx!
     
  6. Oct 5, 2001 #6
    ldiezman

    ldiezman

    Jul 11, 2001
    Nashville
    most excellent. thanks a lot. guys