depends on your amp setup.
what make and model are we talking about??
is the amp stereo??
I use a little 212 Behringer combo from sweetwater it is left right stereo. and use the rca aux in on the back of the amp from the r24 zoom mixer recorder also from sweetwater and drive 2 Behringer 4/12 cabs as left right for the studio.
I just feed channels 1 as left and channel 2 as right from the 11 rack to the r24 zoom.
sounds great in a small room.
low cost and sounds ok.
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Thanks Paul in Iowa