Best mini cardioid condenser for DB

[David Powell]

At a recent rehearsal using the DPA 4021 with the AI Coda, I observed a curious behavior concerning feedback or the lack thereof. I noted earlier that I could run the channel (notch filter on) with the gain at the 9:00 o'clock position and the master at 12:00 without feedback. What I observed at a recent rehearsal (concrete floor) and confirmed at a a gig today (carpeted plywood) is that I can boost the master gain well beyond 12:00 o'clock and still not get feedback while attempting to increase the channel gain beyond the 9:00 o'clock position results in immediate feedback.

This seems odd to me, but in any case, boosting the master now allows me to get very loud with the mic and still no hint of feedback or boomy resonance. Odd, but a welcome discovery. I'm guessing the behavior is the same with other mics as well? Has anyone else experienced this?