If the preset is emulating the Neumann U67 microphone, the star of the show is the high-end shelf. The U67 is famous for a boosted presence in the 10kHz-12kHz range. A -67 preset will often apply a gentle shelf boost here. This adds "sparkle" or "air" to the vocal, helping it cut through a dense mix without needing to turn the volume up. It makes the singer sound closer to the listener, creating intimacy.
The first seventy-two reels were nothing. Static. Ghosts of Soviet radio jamming. A man coughing in Russian. Lena logged them, processed them, and moved on. -67 vocal preset
The is the ultimate "fixer." By aggressively rolling off the high end and saturating the mids, it masks the sound of a bad room. It turns the sterile "laptop microphone" sound into something that feels like a classic vinyl record. If the preset is emulating the Neumann U67