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Daisy-chain Acoustic bass b410 MkII and b115 MkII no labels on input/output

Discussion in 'Amps and Cabs [BG]' started by Brian Fight the Heathens, Nov 1, 2015.


  1. Hi, I´m new to connecting cabs together. I´ve always used combo amps before.
    I´ve bought two cabs and amp . My question is if the comination will work.

    Amp: B300h (2 4ohm jacks)
    Acoustic b410 MkII 8ohm
    Acoustic b115 MkII 8ohm

    Because the amp only has 2 4ohm jack output I need to daisy-chain the cabs in parallel, right? But how do I do this when there is no labels on the input/output on the cabs (see pics).

    Should I connect right to left jack. Or right to right.
    Does it even matter?
    Can I even use the amp and cabs together?
    DSC_0190.JPGDSC_0189.JPG
     
  2. lz4005

    lz4005

    Oct 22, 2013
    Your total load is 4 ohm. You can plug them both into the amp or daisy chain. It doesn't matter.

    That picture clearly tells you which jack to use for daisy chaining. Read the text.

    And now we wait for the people to tell you why you shouldnt use a 1x15 with a 4x10.....
     
    Fat Steve likes this.
  3. The 4 ohm minimum on the amp head means no loads lower than 4 ohms for one jack or both together. Use two cables from the amp to the cabs or use the jacks on the cabs to connect to each other. Jacks on both cabs are the same, no in and out they connect the same.
     
  4. Welcome to Talkbass.
    The outputs are the same, 4 ohms is the minimum for both used or just one.
    Use one output to the top cab then from the top cab to the bottom cab.
    Or Right output to top cab and Left output to the bottom cab.
    Make sure you are using a Speaker Cable and NOT a shielded instrument cable. They are very different inside.
     
    cfsporn and B-string like this.
  5.  
  6. So use the left output on the b115 to the head and the right output to the b410 cab. Then on the b410 cab what side do I plug into or does it matter.
     
  7. Also I tried plugging both cabs into the amp head and it got fried. I already replaced the head don't want fry it again.
     
  8. How did you hook up to cause this? Are you using Speaker Cables?
     
  9.  
  10. Yes Left to 15, and right to 4x10 will work.
    On the Cabs pick one jack, they are wired together.
     
  11. Two speaker cables using left side outputs from each cab to each input on amp head.
     
  12. Then you did nothing to fry the last amp head. It was just a bad unit. Only way is if one of the cables is shorted or there is a short in the speaker cabs.
     
  13. two fingers

    two fingers Opinionated blowhard. But not mad about it. Gold Supporting Member

    Feb 7, 2005
    Eastern NC USA
    Hey Welcome to Talkbass!

    The outputs on the amp are probably wired in parallel. As are the inputs on the speaker cabs.

    So advice above already nailed it. If you have two 8 ohm cabs, you can either go from each cab to the head or chain them. It shouldn't matter.

    As asked above, are you 100% sure your cables are speaker cables? They look a lot like signal cables but function differently.
     
  14. That sounds good. Did you have the power turned on the head when plugging in? Never do that.
     
  15. HolmeBass likes this.
  16. These are cables I'm using live wire elite 12 gauge. Could it have been the venue that burnt out the amp head.
     
  17. That says Speaker Cable on it. Seems that you did everything correct.
    Maybe you had a bad unit.
     
  18. lz4005

    lz4005

    Oct 22, 2013
    That is backwards.
    Output from head to input on cab
     
    HolmeBass likes this.
  19. When you stack the cabinets put the 15 on the top. You can hear it better that way and you DO need to hear it. :)
     
    cfsporn likes this.
  20. Talk with manufacturer and all the different configurations you guys mention were correct. So it was the venue or defective head thanks for help.
     
    S-Bigbottom and B-string like this.

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