measurement microphone unbeatable dynamic rangeclose miking recording situations regardless of the sound sourcespecially designed to handle extremely high sound pressure levelsThe 4004 is an omnidirectional hi-voltage (130 V) close miking specialist with an extended on-axis frequency response from 10 Hz to 40 kHz (±2 dB). An ideal measurement mic, the 4004 is a reference condenser microphone specially designed to handle extremely high sound pressure levels - up to 168 dB SPL before clipping occurs. It has an unbeatable dynamic range of 124 dB from the noise floor to 1% THD and an extended headroom of 20 dB up to clipping level due to the special hi-voltage powering system. The 4004 is acoustically identical with the reference microphone Type 4007, but differs in the powering system and the fact that the 4004 has a transformerless output. 4004 is totally transparent and is the perfect choice in all close miking recording situations regardless of the sound source.