^^^ Don't open that box or we are domed!
Is that one of those $10-15K "tube mics"? I used to daisy-chain my DAT recorder into (others' with) multiple mic setups that cost a small fortune at some live shows ... they "were sorta seriou$" about it all

.
I just plugged in and then enjoyed the live shows as "they" did all the heavy lifting
Great recordings of live music ...
Win-win