Millennia HV-3C Two Channel Microphone Preamplifier
- Two-channel transformerless microphone preamplifier
- +23 dBu maximum input with no pads needed
- 36-step gain switches matched between channels to 0.08 dB
$2,250.00 USD
Millennia HV-3C Two Channel Microphone Preamplifier
The Millennia HV-3C puts two channels of microphone preamplification in a rack-mount unit. Each channel’s transformerless, discrete front end accepts up to +23 dBu, so no pads are needed.
A 36-step gold-plated rotary switch sets each channel’s gain at about 1.5 dB per step, matched between channels to within 0.08 dB. Two lighted pushbuttons set the gain range, adding 18 dB or 36 dB to the settings printed on the front panel.
The audio path is fully balanced, and equivalent input noise is -133 dB. The FET-based output stage reaches +32 dBu and drives cable runs of 1,000 ft (300 m).
Each channel has a +48 V phantom power switch, a signal-present LED that lights at about -35 dBu, and an overload LED set at +25 dBu. The welded 16-gauge steel rack chassis holds a universal switching power supply, with OFC audio wiring and silver Teflon power wiring inside.
Features
- Two channels in a 19-inch rack chassis
- Transformerless discrete front end with +23 dBu maximum input, no pads needed
- 36-step gain switches at about 1.5 dB per step, matched to 0.08 dB
- Gain-range buttons add 18 dB or 36 dB
- +32 dBu maximum output; drives 1,000 ft cable runs
- -133 dB equivalent input noise
- +48 V phantom power on each channel
- Universal switching power supply
What's Included
- Millennia HV-3C preamplifier
- Quick start guide
- AC power cord (110 V countries)
Specifications
| Channels | 2 |
|---|---|
| Type | Transformerless microphone preamplifier, discrete front end |
| Gain Control | 36-step detented switch, about 1.5 dB per step, channels matched within 0.08 dB |
| Gain Range Buttons | +18 dB, or +36 dB with both pressed |
| Equivalent Input Noise | −133 dB EIN (60 dB gain, 10 Hz to 30 kHz, inputs common) |
| Intermodulation Distortion (50 Hz and 7 kHz) | Under 0.0009% (35 dB gain, +27 dBu out) |
| Phase Response | Under 2 degrees deviation (35 dB gain, 50 Hz to 20 kHz, +27 dBu out) |
| Common Mode Rejection | Over 65 dB, typical over 85 dB (35 dB gain, 10 Hz to 20 kHz, 100 mV) |
| Slew Rate | Over 25 V per microsecond (35 dB gain, +27 dBu out) |
| Maximum Input Level (20 Hz to 40 kHz) | +23 dBu, no pads required |
| Maximum Output Level (20 Hz to 40 kHz) | +32 dBu |
| Phantom Input Impedance (1 kHz) | 6,750 ohms |
| Output Impedance | 24.3 ohms (x2) |
| Phantom Power | +48 V DC |
| DPA (B&K) Microphone Powering | +130 V DC maximum, non-phantom (factory option) |
| Signal LEDs | Signal present about −35 dBu; overload +25 dBu |
| Power | Universal switching power supply; 12 W maximum |
| Chassis | Welded 16-gauge steel, 19-inch rack |
| Dimensions (W x H) | 19 × 1.75 in |
| Shipping Weight | 15 lb |
| Operating Environment | 0 to 40 °C (32 to 104 °F), 10 to 80% RH, up to 3,000 m altitude |
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