Roberts mic tube preamp project  
4 preamps in action.  The bottom 2 are on the overheads (MXL 990/991 via phantom power), the 3rd one on the snare (sm57), the 4th is on Bills guitar cab (sm57)

4 preamps in action. The bottom 2 are on the overheads (MXL 990/991 via phantom power), the 3rd one on the snare (sm57), the 4th is on Bills guitar cab (sm57)


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