I bow to the technical expertise above. For what it's worth, I played in a 6 piece band (guit, drums, vocals, me, 2xhorns), and preferred to stand next to the guitarist on stage. I got the sound guy to make me a long speaker lead, good quality cable with Speakon plugs each end. That way, I could keep my amp just behind me in case I needed to fiddle, but the cab was on the other side of the drums. It sounded better with mine and the guitarists cabs/sound either side of the stage rather than next to each other. Worked well for me anyway.