b'14 Clockaudio -Boundary Cardiod MicrophonesARM 102-RFmotorised through-table boundary cardioid condenser microphoneThe ARM 102-RF is a boundary layer through table cardioid condenser microphone, with a built-in motorised mechanism that will allow the user to make the microphone disappear without having to physically touch it or remove it from the table. A positive (+2.5V to +12V) signal applied to the DSP control port will simultaneously activate all ARM motorised microphones connected to the ARM-C (control unit for ARM microphones).Easy to installLow profile at surface levelRobust brass constructionCardioid polar patternBuilt-in RF filterBalanced outputSupplied with 2m (6.6ft) 2 core + screen cableSatin Nickel or Black Nextel finishModels:ARM 102-RFBlackARM 102N-RF NickelModel:ARM 102-RFTypeCondenser (Back Electret)Polar PatternHalf Cardioid Frequency Response50Hz - 18KHzSensitivity-37dB +/- 3dB @ 1KHz (0dB = 1v/Pa)Impedance200WS/N Ratio69dB(A)Maximum SPL125db at 1KHz 1% T.H.D. Power Requirements9 ~ 48v Phantom Power ARMF Straight CutTerminationOpen endedDimensionsAbove Table: 18mm (0.70)Illustrating straight cut edge for counter sinking into table top Diameter:36mm (1.42) to give a perfectly flat surface. Below Table: 149mm (5.86) Diameter:30mm (1.18)= RF-Immunity Version'