Altec 150 'coke bottle' tube microphone (3)A pair of omnidirectional tube mics, with the 21 (omni) head on each. I included a photo of the power supplies just because they look so bloody cool. They are the coolest room mic in the world. If you've heard the drums on Nirvana's 'In Utero,' then you've heard these mics. Congratulations. On everything.