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The PACEQ-1 from ETS is a seven band, pre-amp, equalizer,alc, DVR interface box. Professional Grade, Single zoneaudio surveillance system for use where sound quality and recording of conversations is of critical importance. Kit includes professional grade Cardioid patternmicrophone and DVR-I/P camera interface featuring 48Vdc phantom power supply, ultra low noise microphone preamplifier, 7 band equalizer andcompressor/limiter (automatic level control). Equalizer provides +/-12db sound emphasis or de-emphasis in 7 ranges of frequencies (60hz-15khz) for tuning outbackground noise and emphasizing the desired sound qualities in acoustically difficult environments such as interrogation / interview rooms. Compressor /limiter Automatically lowers the gain in loud environments and when quiet, raises the gain where faint audio sources such as peoplewhispering can then beheard.