Check the listing for details. Universal Audio UA 4-710d 4-Channel Mic Preamp. Condition: New. Listed at 2599.00 USD. 4-710d 4-Channel Mic Preamp Specifications:Analog Section, Channels 1-4Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20Hz-20kHz, minimum gain, maximum level, 24-bits, all switches in neutral or off mode, 100% solid state, digital output = 0dBFS.Microphone Preamplifier to Line Out:Gain Range: 56dBMin Gain: 14dBMax Gain: 70dBMax Input Level (bal): 6.7dBuMax Output Level (bal): 20dBuInput Impedance (bal): 2kÎInput Impedance (Hi-Z): 2.2MÎOutput Impedance (bal): 600 ÎEquiv. Input Noise (150Î, 56dB gain): -127dBuFrequency response (20Hz-20kHz): +0.1/-0.15dBCrosstalk (max gain, 1kHz): < -115dBLow Cut Filter:Type: Bessel 2nd OrderCorner Frequency: 75HzAttenuation (20Hz): -23dBPad:Attenuation: 15dBPhantom Power:Phantom Power Current (per jack): 10 mAVoltage: 48V ±1VCompressor:Threshold: 10dBuCompression Ratio: 4:1Fast Attack Time: 0.3msFast Release Time: 100msSlow Attack Time: 2.0msSlow Release Time: 1100msAnalog-To-Digital Converter SectionNote: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20Hz-20kHz, minimum gain, maximum level, 24-bits, all switches in neutral or off mode, 100% solid state, -1dBFS output.Microphone & Line Inputs (Ch 1-4):THD+N (-1dBFS): -100dB (0.001%)SNR (A-Wt): 110dBDynamic Range (-60dBFS, A-wt): 110dBFrequency response: +0.1/-0.15dBStereo Phase: