VHD Input Specifications
| Front View |
 |
| Rear View |
 |
| Physical * | ||
|---|---|---|
| Depth | 200mm / 7.9 inches | including front panel knobs, excluding connectors |
| 275mm / 10.9 inches | including front panel knobs and connectors | |
| Height | 171mm / 6.75 inches | |
| Width | 35mm / 1.4 inches | front/rear panels |
| 49mm / 1.9 inches | overall width (front and rear panels are offset) | |
| Weight | 260g / 9.5 ounces | |
| Boxed size | 190mm x 290mm x 70mm / 7.5" x 11.5" x 2.5" | |
| Boxed weight | 460g / 16.5 ounces | |
| * All values are approximate | ||
| Environmental | ||
|---|---|---|
| Temperature | Operating: | +5 to 30 deg. C |
| Non-operating: | –20 to 50 deg. C | |
| Max. gradient: | 15 deg. C/hour | |
| Relative Humidity | Operating: | 20 to 80 % |
| Non-operating: | 5 to 90 % | |
| Max. wet bulb: | 29 deg. C (non-condensing) | |
| Vibration | Operating: | < 0.2 G (3 – 100Hz) |
| Non-operating, power off: | < 0.4 G (3 – 100Hz) | |
| Shock | Operating: | < 2 G (10ms max.) |
| Non-operating: | < 10 G (10ms max.) | |
| Altitude | Operating: | 0 to 3000m (above sea level) |
| Non-operating: | 0 to 12000m | |
| EQ Filters | ||
|---|---|---|
| Frequency range | Slope | |
| HF (Low Pass): | 20kHz – 3kHz (–3dB point) | 12dB/Octave |
| LF (High Pass): | 15Hz – 350Hz (–3dB point) | 18dB/Octave |
| Performance Specification* | ||
|---|---|---|
| Microphone Amplifier Performance | ||
| Gain | Continously variable from +20dB to +70dB | |
| Independently switchable 20dB Pad available | ||
| Input Impedance | Continously variable from ≅1k2Ω to ≅10kΩ | |
| Output Headroom | > +26dBu at onset of clipping | |
| THD + Noise | (-18dBu applied, +28dB gain) | < 0.2% (20Hz - 20kHz) |
| With VHD, adjustable between | < 0.2% and 5% (1kHz - 20kHz) | |
| Frequency Response | 20Hz to 20kHz | +0.3dB |
| 50kHz | -3dB | |
| 150kHz | –3dB | |
| Equivalent Input Noise | (input terminated with 150Ω) | < –126dB at maximum gain |
| < –80dB at minimum gain (with Pad ‘IN’) | ||
| Common Mode Rejection | (-10dBu applied, +30dB gain) | > 75dB from 50Hz to 1kHz |
| > 65dB at 10kHz | ||
| Line Input Performance | ||
| Gain | Continously variable from -24dB to +24dB | |
| Input Impedance | 10KΩ | |
| THD + Noise | (-24dBu applied, +0dB gain) | < 0.05% from 20Hz to 20kHz |
| -3dB at 50kHz | ||
| Frequency Response | 20Hz to 20kHz | +0.1dB from 20Hz to 20kHz |
| 50kHz | –3dB | |
| Equivalent Input Noise | (Input terminated with 150Ω) | -90dB |
| * See User Manual for measurement conditions & references |