HV-3D-4 Microphone Preamp

HV-3D-4 Microphone Preamp

Regular price $3,309.00 Sale price $3,112.99
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Authentic Transparency for Unrestricted Creativity

  • Unsurpassed ambience 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
  • 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

Options

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

Specifications

Minimum Gain 8.5 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 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)
DPA (B&K) Mic Powering +130 V dc max, (non-phantom)
Phantom Powering +48 V dc, +/- 4 V dc
Power Consumption 45 watts maximum
Power Requirements 100V to 240V, 50/60 Hz
Dimensions/Shipping Weight 19” W x 3.5” H x 12.5” D, 21 lbs.