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Bass Amp Question

  • 15-10-2007 9:52am
    #1
    brezno
    Registered Users, Registered Users 2 Posts: 7 ✭


    Hey,

    I know this is probably a stupid question but I've always used combos before so it never came up. Just bought a new SWR 400w head and am going looking for a cab now... do I need a 400w? ie if I bought a 200w cab would it blow the cr*p out of the cones????

    Any help or insight would be gratefully appreciated!!

    Cheers,
    brezno


Comments

  • #2
    Karl Hungus
    Closed Accounts Posts: 29,130 ✭✭✭✭Karl Hungus


    Yeah, you definitely need a cabinet that's rated higher than the head, otherwise you'll get some major blow outs if you crank it. I'd say you might want to get something rated higher than 400w to be on the safe side.


  • #3
    unclebill98
    Registered Users, Registered Users 2 Posts: 3,816 ✭✭✭unclebill98


    Whats your budget? Whats the Amp model you got? Are you looking for 2x10, 4x10, 1x15 cab etc? Or would a 2 cabs and a head suit you? How do you move your gear, car/van etc? More info please?

    Assuming you got the SWR WorkingPro 400 Head 400 Watt.

    you won't blow up a cab. 200w cab would be 8ohms, head gives out 250w at 8ohms so it be fine.

    Even if you attached a 200w cab to the head your never going to drive all 250w into it anyhow. The cab would start to fart. You need to slave the cabs off the head. Ie 4x10 and a 1x15, or 2x10 and 1x15 to get all 400w. At that your never going to the the full 400w as you would be running the cab at 10 on the pre side and 10 on power amp side, which your very unlikey to do, cause you like your new amp ;-)

    this looks nice if your staying with SWR

    http://www.swrsound.com/products/search.php?partno=4450200010

    According to the manual of the amp these are SWR own Suggested Speaker Enclosures

    SWR WorkingPro 4x10
    SWR Goliath III™ 4x10
    (1) SWR WorkingPro 4x10 & (1) SWR WorkingPro 1x15
    (1) SWR Goliath III 4x10 & (1) SWR Son Of Bertha™ 1x15
    (1) SWR WorkingPro 4x10 & (1) SWR WorkingPro 2x10
    (1) SWR Goliath III 4x10 & (1) SWR Goliath Junior III™ 2x10 (8 ohms)

    But i do note they dont suggest Combinations, whats that telling you????

    Hope that helps.


  • #4
    Eoin Madsen
    Registered Users, Registered Users 2 Posts: 2,117 ✭✭✭Eoin Madsen


    Bear in mind when matching cabs and amps that speaker damage is more often caused by excessively cranking up amps that aren't delivering enough power to the speakers than by overpowering the speakers. Square waves blow out cones.

    When you're comparing wattage be aware of two things:
    1. Wattage for an amp is measured at a given speaker impedence. 100 watts RMS at 4 ohms will deliver 100 watts RMS into a 4 ohm speaker. It won't deliver 100 watts RMS into an 8 ohm speaker.
    2. Wattage can be measured as continous power, program power, RMS power, and peak power. They're usually multiples of each other. If you don't know which you're dealing with, the wattage figures are meaningless.


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