Dummy load resistors acting as additional cabs

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

  1. 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 Gold Supporting Member Commercial Seller

    Mar 8, 2009
    Head Tinkerer, The Flufflab
    So, where does the extra 2x95W go and how loud is it?
  3. 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

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    This. Waste of money and effort.
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  6. 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.
  7. dincz


    Sep 25, 2010
    Czech Republic
    Resistors are very quiet but they might keep you warm in winter :)
  8. Thanks guys, this is what I need ;)
    I guess I'll buy additional cabs :hyper:
  9. chucko58


    Jan 17, 2002
    Silicon Valley, CA, USA
    I paid for all my gear myself. Well, me and MasterCard.
    Buying more cabs is a win. There's no replacement for displacement!