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two heads one cab

i play an upright and electric i have an acoustic image 10-2 bass amp with a 15 cab for upright and ampeg and 4-10 cab for electric tired of lugging all this, Can i use the two heads for diff basses in same 4-10 cab?
 
i play an upright and electric i have an acoustic image 10-2 bass amp with a 15 cab for upright and ampeg and 4-10 cab for electric tired of lugging all this, Can i use the two heads for diff basses in same 4-10 cab?
In a word, no. You cannot run a tube head into no load and you cannot have the speaker outputs of two amps connected. At least you are not a drummer. :D
 
If the ampeg is tube you can't A/B/Y it.

Note that ABY is a dangerous business at the best of times. One messed up connection smokes both amps instantly. Also, some are only meant for instrument signal, not speaker current.

while it would certainly work with the right AB Box, it is as Downunderwonder says - kind of dangerous, having a setup that can cause serious harm to your equipment with a single flip of a switch at the wrong time.
I'm using two heads into a stack of two cabs frequently,
but i use one speakercable and one powercable. when i switch heads, i just change those two. It's done in a few seconds and nothing can go wrong.
 
Ive got an Ampeg amp/speaker switcher rack that lets you select between your speaker cab and amp with a knob turn. Ampeg used to sell/give them to dealers for A/B comparison of heads and different cabs without gankin wires around all day. Its got at least 2 resistive loads in it for tube heads IIRC, and another 2 or 3 slots for solid state heads. They used to be expensive as hell but you can get them pretty reasonably now when you can find them