Millennia HV-37 Microphone Preamp

The Millennia HV-37 is basically 2 HV-35 Model 500 series preamps in a 1U rack with a power supply.

Features

• Continuously variable gain control
• Front panel instrument input
• DC coupled ribbon mic with 10dB gain boost setting
• 80 Hz rolloff filter
• 48V phantom power
• 15 dB Pad
• Polarity flip

• Minimum Gain - 8.5 dB
• Maximum Gain (1.5 dB per step, 36 steps) - 65 dB (up to 75 dB on request)
• Frequency Response (+0 / -3 dB) - sub 3 Hz to beyond 300 kHz
• Noise 60 dB Gain, 10 Hz - 30 kHz, Inputs common) - -133 dB EIN
• Total Harmonic Distortion + Noise (35 dB Gain, 10 Hz - 20 kHz bandwidth, +27 dBu Out) - < .001%, Typ. < .0005% (< 5 ppm)
• Intermodulation Distortion ((50 Hz & 7 kHz) 35 dB Gain, +27 dBu Out) - < .0009%
• Phase Response (35 dB Gain, 50 Hz - 20 kHz bandwidth, +27 dBu Out) - < 2 degrees deviation
• Common Mode Rejection Ratio (35 dB Gain, 10 Hz - 20 kHz bandwidth, 100 mV C.M.) - > 65 dB, Typ > 85 dB
• Slew Rate (35 dB Gain, +27 dBu Out) - > 25 Volts per microsecond
• Maximum Input Level (20 Hz - 40 kHz) - +23 dBu (no attenuator pads required)
• Maximum Output Level (20 Hz - 40 kHz) - +32 dBu
• Phantom Input Impedance (1 kHz) - 6,750 ohms
• Output Impedance - 24.3 Ohms (x2)
• Phantom Powering - +48 V dc, +/- 2 V dc