2 mentions in 2 episodes.
“He uses, um, I think it's an R44 in the front of kick, like the ribbon mic, RCA.”
Engineer John Rooney's drum setup at Electric Lady included an RCA ribbon mic in front of the kick.
“I have these two KU-3A microphones... these are two ribbon mics that are about six to eight feet apart”
Rostam's pair of RCA KU-3A ribbon room mics, spaced several feet apart, are his signature way of getting a wide stereo drum sound.