ECM PRO Ultra-Linear Measurement Condenser Microphone for Studio Monitor Calibration Ultra-Linear Measurement Condenser Microphone for Studio Monitor Calibration ECM PRO — MEASURE THE ROOM, FIX THE MIX The best monitors lie. Not because they want to — because the room makes them. Standing waves, early reflections, and modal nulls colour everything you hear, and what you don't measure you cannot correct. The ECM PRO is the omnidirectional measurement condenser that tells you the truth. A ruler-flat 20 Hz–30 kHz response — that's not a marketing range, that's the working range of a serious measurement tool. Pair with the Behringer Ultracurve or any standard room-analysis software (REW, Smaart, FuzzMeasure) for instant acoustic snapshots, monitor calibration, and PA tuning. Gold-plated XLR for signal integrity, +48 V phantom required.