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Millennia Media Inc HV-3D (4-Channel)
4-Channel Microphone Preamp

OUR PART #:  HV3D-4

The Millennia HV-3D (tm) is a four or eight channel, fully matched microphone preamplifier of uncompromising sonic character, technical specification, and mechanical workmanship.
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Millennia Media Inc HV-3D (4-Channel)
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The Millennia HV-3D (tm) is a four or eight channel, fully matched microphone preamplifier of uncompromising sonic character, technical specification, and mechanical workmanship. The HV-3D offers multiple channels of HV-3C preamplifiers at significantly less per-channel cost.

With circuitry identical to Millennia's acclaimed HV-3C series high voltage microphone preamplifier, the HV-3D offers high resolution gain switching (36 steps @ 1.5 dB per step), optional B&K (DPA) 130V mic input option on every channel, DC-coupled input option on every channel for optimizing ribbon and other dynamic mics, a passive summing option, and future options, including remote gain control.

Unlike preamps using vacuum tubes, IC function modules, and audio transformers (all of which lend their own audio coloration), Millennia's HV-3 micamp architecture is precisely optimized towards capturing the subtlest detail of music and ambience. With +23 dBu native input headroom, the HV-3D requires no input pads or switch points as found on common "textbook" preamp designs - thus avoiding yet another source of sonic degradation. Moreover, with its +32 dBu output headroom, ultra-high dynamic stability and linearity is assured.

HV-3D signal path from input through output is entirely balanced with a minimum amplifier topology. Uncompromising circuit design with meticulous selection and matching of critical components assures consistently transparent audio performance at all dynamic excursions and frequency extensions. Moreover, standard audio cables over 1000 feet in length have been driven from HV-3 mic preamps with no immediately detectable signal degradation.

Features:

  • High speed transformerless design
  • 23dB Input & 32dB Output headroom
  • No pads (attenuators) required
  • Entirely balanced audio path
  • Laser trimmed FET-based output
  • THD+N less than 5 PPM (.0005%)
  • Matched discrete transistor front-end
  • Optional Bruel & Kjaer (DPA) +130V mic inputs
  • Optional DC-coupled "Ribbon Inputs" on all channels
  • THD+N less typically than 5 PPM (.0005%)
  • High-resolution gain switches standard (36 steps)
  • Interchannel gain matched to .04dB
  • Four channel unit factory upgradeable to Eight channel
  • Fully shielded internal toroid power supply
  • Unsurpassed ambience retrieval
  • Effortless, lifelike musical performance at all dynamic levels

Specifications:

  • Minimum Gain: 8.5 dB
  • Maximum Gain (1.5 dB per step, 36 steps): 60.5 dB (up to 78 dB on request)
  • Frequency Response (+0/-3dB): sub 4 Hz to beyond 300 kHz
  • Frequency Response, Stereo Deviation: <.04 dB
  • Noise @ 60 dB gain, 10Hz-30kHz, Inputs common: -133 dB EIN
  • Noise @ 60 dB gain, 10Hz-30kHz, 50 ohm source: -130 dB EIN
  • Noise @ 60 dB gain, 10Hz-30kHz, 150 ohm source: -128 dB EIN
  • Total Harmonic Distortion + Noise, 35 dB gain, 10 Hz-20kHz bandwidth, +27 dBu out: <.001%, Typ. <.0005% (<5 PPM)
  • Intermodulation Distortion (50Hz & 7kHz) 35 dB gain, +27 dBu out: <.0009%
  • Phase Response 35dB gain, 50Hz-20kHz bandwidth, +27 dBu out: <2 degrees deviation
  • Phase Response, Stereo Deviation 35dB gain, 20Hz-40kHz bandwidth, +27 dBu out: <1/2 degree deviation
  • Common Mode Rejection Ratio 35dB gain, 10Hz-20kHz bandwidth, 100 mV C.M.: >65dB, Typ >85dB
  • Slew Rate 35dB gain, +27dBu out: >25 Volts per microsecond
  • Maximum Input Level 20Hz-40kHz: +23 dBu
  • Maximum Output Level 20Hz-40kHz: +32 dBu
  • Interchannel Crosstalk 35 dB gain, 1kHz, +27 dBu all outputs: Better than -120dB (>20 bits)
  • Phantom Input Impedance @ 20Hz: 6,700 ohms
  • Phantom Input Impedance @ 20kHz: 6,800 ohms
  • Output Impedance: 24.3 ohms (x2)
  • B&K (DPA) Mic Powering: +130 VDC, max, direct (non-phantom) powered
  • Phantom Powering: +48 VDC, +/-2VDC
  • Power Consumption, Max: 45 Watts, maximum
  • Power Requirements: 100 to 240 VAC, 50/60 Hz
  • Dimensions (W x D x H): 19" x 12" x 3.5"
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