Description
HV-3D-8
Eight Channel Microphone Preamplifier
Authentic Transparency for Unrestricted Creativity
- Unsurpassed ambience retrieval
- Transformerless design with matched hi-speed discrete transistor octet has +23 dBu 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 universal power supply
- Grayhill mil-spec gold switching
- Welded 16 gauge steel rack chassis
- Lovingly hand-crafted in Northern California
Options
- Ribbon optimized DC coupled input - $100/channel
- Extra 10dB gain - no charge
- DPA 130V input - $300/channel
- Dante or MADI digital output expander PCB
- Analog output expander PCB (3x outputs per channel)
Specifications
- Minimum Gain 8.5 dB
- Maximum Gain (1.5 dB per step, 36 steps) 60 dB (up to 70 dB on request)
- Frequency Response (+0 / -3 dB) sub 8 Hz to beyond 300 kHz (sub 3 Hz by request)
- 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, +/- 4 V dc
- Power Consumption 45 watts maximum
- Power Requirements 100V to 240V, 50/60 Hz
- Dimensions/Shipping Weight 19” W x 3.5” H x 12.5” D, 23 lbs
