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Dummy load resistors acting as additional cabs

Discussion in 'Amps [BG]' started by EdenXLT, Mar 5, 2014.

  1. EdenXLT

    EdenXLT

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    Hi guys, I have a hartke LH1000 bass amp and I like the stereo sound more than the bridge sound and with two cabs at 8ohm I can push "only" 2x225W... by plugging a 500W/8ohm dummy load resistor to each cab I get 4ohm cabinets and 2x320W from my hartke, havent yet bought the dummies so I'm asking you guys if this is a good/safe idea?
    this is the resistor: http://www.ebay.de/itm/350864623034?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
  2. UncleFluffy

    UncleFluffy

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    Head Tinkerer, The Flufflab
    So, where does the extra 2x95W go and how loud is it?
  3. nashvillebill

    nashvillebill

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    Yes, the amp will put out slightly more power into a 4 ohm load than an 8 ohm load. However, half of that "extra" output is going into the dummy load (as heat)! Your net sound power output will actually be lower.
  4. JimmyM

    JimmyM Supporting Member

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    Endorsing: Ampeg Amps, EMG Pickups
    This. Waste of money and effort.
  5. nashvillebill

    nashvillebill

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    So without the dummy load, you get 225 watts per channel and each cab gets 225 watts. With the dummy load, the amp now puts out 320 watts per channel. However, of that 320 watts per channel, the dummy load gets half (160 watts) leaving 160 watts for the cab. You've dropped your cab from 225 watts to 160 watts.

    Meanwhile, each dummy load is pumping 160 watts into the room, better make sure they are fan-cooled.
  6. dincz

    dincz

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    Resistors are very quiet but they might keep you warm in winter :)
  7. EdenXLT

    EdenXLT

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    Thanks guys, this is what I need ;)
    I guess I'll buy additional cabs :hyper:
  8. chucko58

    chucko58 Supporting Member

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    Buying more cabs is a win. There's no replacement for displacement!

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