Millennia HV-3D4: Elevate Your Acoustic Recordings with Sonic Precision

The Millennia HV-3D4 is a microphone preamplifier renowned for its exceptional sonic character, technical excellence, and meticulous craftsmanship. Tailored for demanding acoustic recording, it features 4 double-balanced, high-dynamic-range stereo microphone preamps. This preamp is a masterpiece of engineering, combining discrete bipolar transistors with a laser-trimmed, DC-coupled, FET-based output stage to preserve signal integrity.

Key Features:

Authentic Transparency for Unrestricted Creativity.
Unsurpassed ambience retrieval.
Transformerless design with matched hi-speed discrete transistor octet providing +23 dBu input headroom (no attenuator "pads" needed).
Uncolored timbral accuracy across all dynamic levels.
Entirely balanced audio path with precision components, maintaining signal integrity with THD under 5 ppm (.0005%).
Laser-trimmed FET-based output stage with 32 dB headroom for driving long cable runs with ease.
Standard 36-step gain controls (1.5 dB per step) that are stereo matched to within 0.08 dB.
Ultra-clean universal power supply.
Grayhill mil-spec gold switching.
Robust 16-gauge steel rack chassis.
Lovingly hand-crafted in Northern California.

Options:

Ribbon optimized DC-coupled input.
Extra 10dB gain (no additional charge).
DPA 130V input option.
Dante or MADI digital output expander PCB.
Analog output expander PCB (providing 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 available on request).
Frequency Response (+0 / -3 dB): Below 8 Hz to beyond 300 kHz (can be extended to below 3 Hz upon request).
Noise (60 dBu 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): < 0.001%, Typ. < 0.0005% (< 5 ppm).
Intermodulation Distortion (50 Hz & 7 kHz) 35 dB Gain, +27 dBu Out: < 0.0009%.
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.

User Testimonial: "I love this box. It has a million colors, so long as you are after shades of clean. I also love the fantastic sounding EQ and piece-of-cake-to-make-sound-good compression that tracks so beautifully." - Jim Dugger