Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups
Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups
Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups

two amplifiers into one speaker cabinet...

Discussion in 'Bad Dog Cafe' started by getbent, Feb 8, 2013.

  1. getbent

    getbent Telefied Ad Free Member


    generally, both amps would not be being played through at the same time, BUT, they would both be on...

    Could you be wired to the same speaker cabinet from two different amps without causing harm to the amplifiers or speakers?

  2. Bones

    Bones Doctor of Teleocity Ad Free Member

    Dec 31, 2005
    Luddite Island, NY
    I wonder if you could just do it with an A-B box?? But the amp wants a load on it, so it's probably not something that's easy to do

  3. getbent

    getbent Telefied Ad Free Member

    can't use AB box for this application... has to be mechanically wired and not switched.

  4. getbent

    getbent Telefied Ad Free Member

    repeat... this has to be hard wired NO SWITCHERS

    sorry... it won't work in this application.

  5. waparker4

    waparker4 Doctor of Teleocity Ad Free Member

    Nov 9, 2011
    Philadelphia, PA
    I don't think it's a good idea without having a switch that takes one amp off the speaker and onto a dummy load while switching the other head onto the speakers.

    The OTs of your two heads will be connected to each other and tha'ts probably bad

    There are stereo amps that send 2 power amp outputs to each speaker inside the same cab though.. ..

  6. marshman

    marshman Friend of Leo's

    Feb 1, 2007
    SE PA
    Do you already have the cab in question? Could you just get a stereo 2x12/2x10/4x12 etc. and connect one head to each 'speaker' in the cab?

  7. teleamp

    teleamp Poster Extraordinaire

    2X12 cab, each amp uses just one speaker, doh, marshman beat me to it...

  8. getbent

    getbent Telefied Ad Free Member

    okay, I'll provide more information---> I need a generally idiot proof way to provide sound reinforcement in a meeting room.

    the room has a fairly complex sound system (requiring a sound man) but, generally, the room is for much more 'general meeting' type activities. The room has a nice projector, connected to it is an Apple TV... a really nice feature of the apple tv is that you can 'beam' your video and audio to it without a a cable!

    It is fantastic. You can use a computer or an iphone or ipad to 'beam' your screen to the projector (this room seats 400 people)....

    The apple tv has optical audio out and I'd like to hook it to the speaker system for every day use.. use a simple but statically set amplifier with optical in and connect to the speakers that are used by the 'fancier' sound system for big meetings.

    I'd like to NOT have to use a switcher as it is a point of failure for users and I want to not have people having trouble needlessly... so, if they are both statically and mechanically connected to the speakers... the systems will work like a champ.

    My fallbacks are: 1) make sure the main system is off and wire them together with instructions to NOT run both at the same time 2) switcher (ugh) 3) separate system...

    My goal is that the volume be managed by the device providing the input and leave it on all the time.

  9. Post Toastie

    Post Toastie Poster Extraordinaire

    Jul 16, 2008

  10. Frodebro

    Frodebro Doctor of Teleocity Ad Free Member

    Aug 17, 2012
    No matter how you do it, the two amps MUST be electronically isolated from each other at all times.

  11. keithb7

    keithb7 Friend of Leo's

    Jan 9, 2010
    Western Canada
    I do this! 2 amp heads into 1 cabinet. I have a Radial Headbone switcher. Works great. I run a 1964 Bandmaster and a 18W TMB Ceriatone, Marshall type amp into a Marshall 1960A JCM900 cab. Sounds great. Here is my setup on the right in this photo:


  12. getbent

    getbent Telefied Ad Free Member

  13. cowboytwang

    cowboytwang Poster Extraordinaire

    Jul 28, 2003
    Sonoran Desert
    What does the sound system "for big meetings" use as a head unit?
    Is there anyway to route the Apple TV to the the same input for that system?

  14. Boubou

    Boubou Poster Extraordinaire

    Jul 30, 2005
    Montreal, Quebec
    Wouldn't the "sound man" know the answer?

    If not, he might be overpaid

    Sent from my iPad using TDPRI

  15. Rhomco

    Rhomco Friend of Leo's

    Oct 8, 2004
    DFW, Texas

    I am not sure all these tube amp concerns are applicable to solid state amp systems. I doubt any modern presentation sound equipment is tube based and that is where all the concerns for protecting the output tranny eminate.
    I would take the question to a mobile audio specialty shop. They deal with solid state powered audio gear daily.

  16. Larry F

    Larry F Doctor of Teleocity Vendor Member

    Nov 5, 2006
    Iowa City, IA
    I used the Headbone switcher with a Ceritone OTS and DRRI, both into a 12" Tone Tubby. Worked great.

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