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HV-3D Four and Eight Channel Microphone Preamplifiers
The Millennia HV-3D 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-3B preamplifiers at significantly less per-channel cost.
With circuitry identical to Millennia's acclaimed HV-3B series high voltage microphone preamplifier, the HV-3D offers standard 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.
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 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.
2000 TEC Award Nomination
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.
Product Highlights
HIGH SPEED TRANSFORMERLESS DESIGN
23 dB INPUT & 32 dB OUTPUT HEADROOM (No Pads Required)
ENTIRELY BALANCED AUDIO PATH
OPTIONAL B&K (DPA) +130 VOLT INPUTS ON ALL CHANNELS
OPTIONAL DC-COUPLED "RIBBON INPUTS" ON ALL CHANNELS
LASER TRIMMED FET-BASED OUTPUT
THD+N LESS TYPICALLY THAN 5 PPM (.0005%)
MATCHED DISCRETE TRANSISTOR FRONT-END
HIGH-RESOLUTION GAIN SWITCHES STANDARD (36 Steps)
INTERCHANNEL GAIN MATCHED TO .04 dB
FOUR CH. UNIT FACTORY UPGRADABLE TO EIGHT CH.
FULLY SHIELDED INTERNAL TOROID POWER SUPPLY
UNSURPASSED AMBIENCE RETRIEVAL
EFFORTLESS, LIFELIKE MUSICAL PERFORMANCE AT ALL DYNAMIC LEVELS
Available Options:
B&K (DPA) +130V mic inputs
DC Optimized Mic Inputs
Channel Summing
Download HV-3D Owner's Manual
Download HV-3D Reset Template
Product Specifications:
MINIMUM GAIN 8.5 dB
MAXIMUM GAIN (1.5 dB per step, 36 steps) 60.5 dB (up to 78 dB on rqst)
FREQUENCY RESPONSE +0 / -3 dB sub 4 Hz to beyond 300 kHz
FREQUENCY RESPONSE, STEREO DEVIATION < .04 dB
NOISE @ 60 dB Gain, 10 Hz - 30 kHz, Inputs common -133 dB EIN
NOISE @ 60 dB Gain, 10 Hz - 30 kHz, 50 Ohm Source -130 dB EIN
NOISE @ 60 dB Gain, 10 Hz - 30 kHz, 150 Ohm Source -128 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 bandwdth, +27 dBu Out < 2 degrees deviation
PHASE RESPONSE, STEREO DEVIATION 35 dB Gain, 20 Hz - 40 kHz bandwidth, +27 dBu Out < 1/2 degree 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*
MAXIMUM OUTPUT LEVEL 20 Hz - 40 kHz +32 dBu
INTERCHANNEL CROSSTALK
35 dB Gain, 1 kHz, +27 dBu All Outputs Better than -120 dB (> 20 Bits)
PHANTOM INPUT IMPEDANCE @ 20 Hz 6,700 Ohms
PHANTOM INPUT IMPEDANCE @ 20 kHz 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, +/- 2 VDC
POWER CONSUMPTION, MAXIMUM 45 Watts, Maximum
POWER REQUIREMENTS 100 to 240 VAC, 50/60 Hz
DIMENSIONS 19" W x 12" D x 3.5" H
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