When working with a live band all playing in the same room, a choice is the Shure SM7B. It's great at capturing the vocalist and rejecting other sounds you don't intend for it to record.
For the Los Lonely Boys self titled album the mic was captured with the 7B and then into a Neve 1073 for a preamp and a 1176 or LA-2A for 3 dB of compression at 3:1 or 4:1 ratio.
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