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Millennia - HV-3C - Stereo Microphone Preamplifier

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Millennia Music & Media Systems - HV-3C - Stereo Microphone Preamplifier
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Combining a precisely matched octet of discrete bipolar transistors with a laser trimmed DC coupled FET-based output driver stage, the HV-3C (tm) is an entirely "double balanced," extremely wide dynamic range stereo microphone preamplifier intended for demanding acoustic recording. Unlike "textbook" mic preamplifiers, the HV-3C signal path never unbalances or rebalances the original signal — thus maintaining a high degree of signal integrity. Over 20,000 channels of HV-3 micamps are already in use by a who's-who in critical acoustic recording.

Unlike preamps using vacuum tubes, IC function modules and audio transformers (all of which can lend their own audio coloration) the Millennia HV-3C is precisely optimized towards capturing the subtlest detail of music and ambience. With +23 dBu native input headroom, the HV-3C requires no input pads, attenuators, 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. NOTE: The HV-3C is a recently-updated version of the HV-3B two channel mic preamp, with improved mechanical design and cosmetics, and standard 36 step gain control. HV-3C uses the identical preamps as found in the HV-3D 8-ch units.

HV-3C signal path from input through output is entirely balanced with a minimum amplifier topology. Uncompromising circuit design with meticulous selection and hand-matching of critical components assures consistently transparent audio performance at all dynamic excursions and frequency extensions.

Read what others are saying about the HV-3C.

Features

  • HIGH SPEED TRANSFORMERLESS DESIGN
  • 23 dB INPUT & 32 dB 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 OCTET FRONT-END
  • OPTIONAL BRÜEL & KJÆR (DPA) +130V MIC INPUTS
  • OPTIONAL 24 BIT, 192 kHz "POW-R" A/D CONVERTERS (HV-3C/24, late 2005)
  • OPTIONAL "DC INPUTS" — IDEAL FOR RIBBON MICS
  • PRECISION COMPONENTRY THROUGHOUT
  • GOLD AUDIO CONNECTORS & SWITCHES
  • STANDARD 36-STEP GAIN CONTROL (1.5 dB PER STEP)
  • STEREO GAIN MATCHED TO .08 dB
  • OFC AUDIO WIRING, SILVER TEFLON POWER WIRING
  • ULTRA-CLEAN TOROID POWER SUPPLY
  • WELDED 16 GAUGE STEEL RACK CHASSIS
  • UNSURPASSED AMBIENCE RETRIEVAL
  • EFFORTLESS, LIFELIKE MUSICAL PERFORMANCE AT ALL DYNAMIC LEVELS

HV-3C Owner's Manual [PDF]

Available Options:

  • B&K (DPA) +130V mic inputs
  • 24-bit 192 kHz A/D "POW-R" converters (est delivery late 2005)
  • DC Input Option for ideal performance with dynamic and ribbon microphones

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

* Approximately equivalent to the output of a B&K 4012 microphone in a 145 dB SPL soundfield.

- Unless stated, all measurements are balanced into 100k ohm load on a calibrated Audio Precision System One.

List Price: 
RAL Price: 
$1,995.00
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Sunday 12 June, 2005
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Millennia
Millennia Music & Media Systems

Millennia Music & Media Systems

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