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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. |
