The optional RTA-M real time audio analyzing mic is the perfect accessory tool for the DriveRack PA series (PA, PX, PA+, PA2) and 260. Used in conjunction with the System Setup Wizard and Auto EQ Wizard the RTA-M is ideal for optimizing the sound quality of even the most difficult of acoustic environments. The RTA-M is an omnidirectional, flat frequency measurement microphone specially designed for the Driverack series to pick up all frequencies from 20 Hz to 20 kHz, ensuring accurate "pinking"/real-time analysis of your audio. It runs on phantom power (supplied by the Driverack units) and comes with a clip and case. Features: Polar Pattern: omnidirectional Element: back electret-Condenser Frequency Response: 20 Hz - 20 kHz Impedance: 250 30% (at 1,000Hz) Sensitivity: -63 dB +-3 dB (0 dB=1V/ microbar 1,000 Hz indicated by open circuit) Operating Voltage: phantom power 9V-52VDC Get your dbx RTAM Sonic Analysis Microphone for Drive Rack Series today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.