Millennia HV-3C

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.

• Unsurpassed ambience retrieval

• Transformerless design with matched hi-speed discrete transistor octet has 23 dB 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 dB 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 toroid power supply

• Gold audio connectors and switches

• Mogami Neglex OFC audio wiring

• Silver Teflon power wiring

• Welded 16 gauge steel rack chassis

MINIMUM GAIN:

8.5 dB

MAXIMUM GAIN (1.5 DB PER STEP, 36 STEPS):

65 dB (up to 75 dB on request)

FREQUENCY RESPONSE (+0 / -3 DB):

sub 3 Hz to beyond 300 kHz

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, +/- 2 V dc

POWER CONSUMPTION:

12 watts maximum

POWER REQUIREMENTS:

Selectable: 100-120, 200-240 V ac, 50/60 Hz

DIMENSIONS/SHIPPING WEIGHT:

19" W x 1.75" H x 12" D, 15 lbs.