A LDC can work very hard for you micing amps. In one of my live sound setups we have more musician /combinations than I had gear for, so we got creative. The band uses at varying times any combination of two electric amps and one acoustic amp. Rather than rent a larger mixer and tie up mics I didn't have, I arranged the amps in a u-shaped configuration and suspended a single LDC in the center. Worked like a charm; the players heard themselves and I had good signal for the mains, BUT it required the guitar players to be able to adjust to volume balancing issues and I was limited to a "one for all, all for one" EQ at the board. Still and all, it works in a pinch.
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