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2 Tube amps, 1 cabinet.... likely a dumb question

Discussion in 'Amps and Cabs [BG]' started by Baird6869, Jul 31, 2012.

  1. Baird6869

    Baird6869 RIP Gord Downey. A True Canadian Icon.


    I can't seem to find a definitive answer in this forum, so I will ask....

    I am planning to run a Mesa all tube D-180 and a Hiwatt DR-103 into a single 410 Sadowsky cab. Reason? One amp for dirty and one for cleans.

    My questions:

    1. Can I have 2 4ohm amp heads plugged into a single 4ohm cabinet at the same time? Physically, the answer is yes, I know. I am more concerned with playing thru one amp with the other amp ON STANDBY with both plugged into the same cab.

    2. Can I have the 2 heads plugged into the cabinet with one being used and the other completely off but plugged in?

    3. Is there a better way to do this?

    Note: I will be playing the Mesa for 3 entire sets and the Hiwatt for 1 set. I will not be switching amps during or between songs.

    Hit me with some TB amp wisdom!:hyper:
  2. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    Easiest way to trash some killer tube amps. It's very easy to forget to hit a standby. Would not do it.
  3. Hi.

    #1. NO

    #2. No, if You're picky about your gear staying alive.

    #3. Yes, either split the cab or get another.

  4. KramerBassFan


    Jan 3, 2009
    Just buy another cabinet.

    If you forget to flick the right switch you might need a totally new set up anyways. ;)
  5. Baird6869

    Baird6869 RIP Gord Downey. A True Canadian Icon.

    Thanks gents!

    So one amp on and one in standby is ok technically, but if I flip the second amp on by accident, I may hear an earth shattering kaboom?

    An A/B splitter for SS amps would work, but not so much for all tube.

    2 cabs it is, I guess!
  6. BurningSkies

    BurningSkies CRAZY BALDHEAD Supporting Member

    Feb 20, 2005
    Seweracuse, NY
    Yep. Two of those components are long out of production, at least one of them being quite rare. The third is an expensive, low production high cost amp.

    I'd be thinking about not doing that.
  7. RickenBoogie


    Jul 22, 2007
    Dallas, TX
    Not even on stand-by. Just never plug 2 amps into 1 cab, ever.
  8. NO!! You cannot connect two amplifiers to a single load period. No matter if SS OR tube. If you have one amp operating and the other in standby, one amp will try to drive the output of the second amp. This WILL cause damage to both amplifiers.
  9. Baird6869

    Baird6869 RIP Gord Downey. A True Canadian Icon.

    I think I get your point now.:oops:

  10. Baird6869

    Baird6869 RIP Gord Downey. A True Canadian Icon.


    Would be really stupid to blow up my crazy expensive '70's Hiwatt at a $100 per man gig just to get a bit of dirt for a few songs! Thanks,:bassist:

  11. fenderhutz

    fenderhutz Supporting Member

    Jan 28, 2007
    Harpers Ferry WV
    Why don't you just use one and run your effects with an A/B box? All it takes is a split second of crossing the loads on those amps to create a bunch of magic smoke from possibly everything connected to it.
  12. BurningSkies

    BurningSkies CRAZY BALDHEAD Supporting Member

    Feb 20, 2005
    Seweracuse, NY
  13. Good decision! :)

    Whereabouts in TO are you?? I'm in Scarberia. :D
  14. Baird6869

    Baird6869 RIP Gord Downey. A True Canadian Icon.

    Whitby. Gig mostly in Durham.
  15. Tractorr


    Aug 23, 2011
    Unless I am missing something, just switch them between sets.
  16. when i seen the title for this thread i thought it was going to be the gas equivelent of a famous porn film
  17. 1958Bassman


    Oct 20, 2007
    If you use a 212 cabinet with a jack for each speaker, you could use an AB/Y switch for the signal to each amp. If you switch between them, you don't need to worry about trashing an amp, whether you plan to use it as a way to do it this way frequently, or not. I can't see a reason to leave one amp on for most of the night, really. If you never, never, never use the Mesa for the set you usually play through the Hiwatt and especially if it's the last set, I would just shut the Mesa off at the end of the third set, plug in the Hiwatt and turn it on.
  18. RCCollins

    RCCollins Supporting Member

    Mar 23, 2008
    San Diego, California
    This. Now you have an extra speaker cable.
  19. JELIFISH19


    Jun 7, 2012
    Can't you use a Radial Headbone?
  20. iwannarock


    Apr 13, 2011
    I think the Radial is only rated for 100 watts.

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