Mini Jubilee Question

Discussion in 'Marshall Amps' started by psychonaut4, Jul 27, 2016.

  1. psychonaut4

    psychonaut4 New Member

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    Just got my new Silver Jubilee head today. I have 2 1x12 speaker cabs I would like to use. One cabinet is a 16 ohm Mesa Boogie. The other is a 8 ohm Orange cab. My question is, is it possible to run both cabs at the same time? Which speaker outs would I use? The 2 8 ohm outs? Or the 16 ohm and one of the 8 ohm outs? Thanks.
     
  2. mickeydg5

    mickeydg5 Well-Known Member

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    Has anyone opened these to see if the output taps are arranged like other latest amplifiers including JVM with each tap to its respective jack(s)?
     
  3. Sir Don

    Sir Don Well-Known Member

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    In a word, no, you can't hook up both cabs at the same time. IF they were matching impedences, ie both 8 or both 16 ohms you could use both.
     
  4. mickeydg5

    mickeydg5 Well-Known Member

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    Post #2 has to be answered first. If it is correct than yes you can.
     
  5. psychonaut4

    psychonaut4 New Member

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    My sales Rep at Sweetwater says yes I can. But I'm not so sure. I sent an email to Marshall. But have not yet heard back.
     
  6. Vinsanitizer

    Vinsanitizer ✴✴✴✴✴✴✴✴✴✴✴ ✴- - - - - TEH - - - - -✴ ✴✴✴✴✴✴✴✴✴✴✴ Double Platinum Supporting Member VIP Member

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    (Post removed. Not sure if my response was correct and I didn't want to risk propagating misinformation.)
     
    Last edited: Jul 28, 2016
  7. mickeydg5

    mickeydg5 Well-Known Member

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    If the new Jubilee amplifiers have their tiers of output jacks situated with a respective output transformer secondary tap then both a 16 ohm cabinet can be plugged into an 8 ohm output jack and an 8 ohm cabinet can be plugged into a 4 ohm output jack simultaneously. The output transformer will have an adequate reflected impedance on the primary in that case for intended operation.

    It has been brought up and discussed before.
     
  8. chiliphil1

    chiliphil1 Well-Known Member

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    If that's true that is absolutely bad**. I would have never tried that with my JVM but apparently it would have worked. Cool.
     
  9. Sir Don

    Sir Don Well-Known Member

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    The above may be the case but I tend to keep it simple.
     
  10. mickeydg5

    mickeydg5 Well-Known Member

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    I agree. That is why you will not read it in manuals. It is confusing to most (the whole OT primary-secondary transformer reflected impedance thing).
     
    Last edited: Jul 29, 2016
  11. Sir Don

    Sir Don Well-Known Member

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    It's clearly indicated on the back of the amp the speaker configurations which are recommended.

    :)
     
    Last edited: Aug 1, 2016
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  12. mickeydg5

    mickeydg5 Well-Known Member

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    psychonaut4, do you give a f*ck?

    Does anyone else?
     
  13. RickyLee

    RickyLee Well-Known Member VIP Member

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    LOL. I gave a FVCK many many times around this place.

    :D

    As you probably remember Mickey, I actually tried what you mentioned above and it worked out sweet.
     
  14. psychonaut4

    psychonaut4 New Member

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    I'm not a known giver of fucks.
    But would still like an answer to my question. Does anyone here have a good email address to Marshall Tech support? I sent them an email a week ago but have not yet heard back.
     
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  15. santiall

    santiall Well-Known Member

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    Plug the 16ohm cabinet into the 8ohm output and the 8ohm cabinet into the 4ohm output. That's perfect impedance match.
     
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  16. mickeydg5

    mickeydg5 Well-Known Member

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    See what I mean. Thank you Santiago.
     
  17. Kutt

    Kutt Well-Known Member

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    If you're located in the United States, tech support questions get routed to U.S. Music Corp who is the distributor for the Marshall in the United States. I do not know how to reach Marshall directly via email, though I'd recommend calling them if your cell plan permits international dialing. I emailed U.S. Music Corp with a speaker question last year and received a dead wrong answer that only the guys on this Forum got right. So, I wouldn't fully trust them no matter what they tell you, and you don't have much wiggle room for incorrect answers on this topic.

    Using both of your cabs simultaneously would be great, but you're running a risk of some degree no matter what by using impedance mismatches. It sounds like you own very nice gear on all counts (Marshall, Mesa, and Orange). If I were in your shoes it's just not worth the risk of damaging your amp by experimenting. One option is to install two new speakers in one of your cabs to make the Mesa and the Orange the same rating.
     
  18. psychonaut4

    psychonaut4 New Member

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    Thanks Kutt. That's what I was thinking last night. It's not worth the risk. So I think I'll just replace one of the speakers.
     
  19. Jethro Rocker

    Jethro Rocker Well-Known Member

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    This is coming from Santiago, who designs many a Marshall amp. He knows how it's rigged inside, sounds like it's safe.
     
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  20. Kutt

    Kutt Well-Known Member

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    Not trying to discount input from anyone else. Just wanted to post this snippet from the 2555X manual. Other impedance combinations are probably safe and they are probably just covering their backside with this warning.

    [​IMG]
     
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