Millennia HV-35 Microphone Preamplifier Module
- Single-channel API 500 series microphone preamplifier
- Front-panel instrument input and ribbon mode with 10 dB of extra gain
- 80 Hz high-pass filter, pad, polarity flip, and phantom power
$855.00 USD
Millennia HV-35 Microphone Preamplifier Module
The Millennia HV-35 is a single-channel microphone preamplifier for API 500 series racks, with a front-panel instrument input, a ribbon mode, and an 80 Hz high-pass filter.
It fits an API 500VPR or a lunchbox rack, or another rack built to the API spec, and draws its power from the rack, phantom power included.
Gain runs from 14.5 dB to 60 dB and rises faster near the knob’s full clockwise position, for low-level signals. The ribbon mode DC couples a ribbon or dynamic microphone to the gain stage and adds 10 dB, for up to 70 dB of gain. A microphone that needs phantom power does not work in this mode.
The Hi-Z instrument input takes bass guitars and other high-impedance sources. The high-pass filter rolls off below 80 Hz at 6 dB per octave, and the pad cuts the signal by 13.5 dB after the gain stage. The polarity flip changes how several microphones on one source interact.
Features
- API 500 series module, one channel
- Continuously variable gain, 14.5 dB to 60 dB
- Ribbon mode with 10 dB of extra gain
- Front-panel Hi-Z instrument input
- 80 Hz high-pass filter, 6 dB per octave
- 13.5 dB pad
- Polarity flip
- +48 V phantom power
Specifications
| Format | API 500 series module, one channel |
|---|---|
| Compatible Racks | API 500VPR, lunchbox, or racks built to the API spec |
| Gain | 14.5 dB to 60 dB, continuously variable (70 dB in ribbon mode); 1 dB minimum with pad |
| Pad | 13.5 dB, after the gain stage |
| High-Pass Filter | 80 Hz, 6 dB per octave |
| Polarity | Polarity flip switch |
| Frequency Response (−3 dB) | Under 10 Hz to over 200 kHz (typical −1.0 dB at 10 Hz, −1.5 dB at 200 kHz) |
| Equivalent Input Noise | −130 dB EIN (60 dB gain, 10 Hz to 30 kHz, inputs common) |
| THD+N | Under 0.003%, typical under 0.001% (35 dB gain, 10 Hz to 20 kHz, +24 dBu out) |
| Intermodulation Distortion (50 Hz and 7 kHz, 35 dB gain) | Under 0.0006% at +12 dBu out; under 0.001% at +20 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, +24 dBu out) |
| Maximum Output Level | +28 dBu |
| Input Impedance (1 kHz) | 2.2 kohms (microphone, phantom); 1 Mohm (instrument) |
| Output Impedance | 24.3 ohms (x2) |
| Phantom Power | +48 V, from the 500 series rack |
| Power Consumption | +45 mA / −25 mA nominal; +75 mA / −25 mA with +48 V on |
| Dimensions (W x H x D) | 1.5 × 5.25 × 6 in |
| Shipping Weight | 2 lb |
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