Millennia HV-3D-4

SKU: HV-3D-4

Four Channel Microphone Preamplifier


About this item



Millennia HV-3D-4

Authentic Transparency for Unrestricted Creativity

  • Unsurpassed ambiance retrieval
  • Transformerless design with matched hi-speed discrete transistor octet has +23 dBu input headroom: no attenuator “pads” needed
  • Uncolored timbral accuracy at all dynamic levels
  • An entirely balanced audio path with precision components maintains signal integrity: THD under 5 ppm (.0005%)
  • Effortless, vividly realistic musical performance
  • Laser-trimmed FET-based output stage has 32 dBu headroom: drives 1000 foot (300 m) cable runs with ease
  • Standard 36-step gain controls (1.5 dB per step) are stereo matched to .08 dB
  • Ultra-clean universal power supply
  • Grayhill gold mil-spec switching
  • Silver Teflon power wiring
  • Welded 16 gauge steel rack chassis
  • Lovingly hand-crafted in Northern California


  • Ribbon optimized DC coupled input – $100/channel
  • Extra 10dB gain – no charge
  • DPA 130V input  – $300/channel
  • Dante, AES, or MADI digital outputs


Minimum Gain8.5 dB
Maximum Gain (1.5 dB per step, 36 steps)60 dB (up to 70 dB on request)
Frequency Response (+0 / -3 dB)sub 8 Hz to beyond 300 kHz (sub 3 Hz by request)
Noise (60 dBu 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 Impedance24.3 Ohms (x2)
DPA (B&K) Mic Powering+130 V dc max, (non-phantom)
Phantom Powering+48 V dc, +/- 4 V dc
Power Consumption45 watts maximum
Power Requirements100V to 240V, 50/60 Hz
Dimensions/Shipping Weight19” W x 3.5” H x 12.5” D, 21 lbs.

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