Microphone Preamplifier
| Mic Preamplifier | iD4 | iD14 | iD22 |
| Mic Gain | 0-58dB | 0 to 66 dB (inc. +10 dB software boost) | -10 to +60 dB (-10dB Pad) |
| Line Gain | -10 to 48 dB (-10dB hardwired line pad) | -10 to 56 dB (-10dB hardwired line pad) | -20 to +40 dB (-10dB Pad) |
| PHANTOM POWER | 48V ±4V @ 10mA/Channel | 48V ±4V @ 10mA/Channel (12VDC only)* | 48v +/-4v @ 10mA/Channel |
| MIC EIN | <-126.0 dBu | <-127.0 dBu | <-125dBu |
| CMRR | >75 dB @ 1kHz | >80 dB @ 1kHz | >80dB @ 1kHz |
| MAXIMUM INPUT LEVEL | +12 dBu (0 dBFS digital Maximum) | +12 dBu (0 dBFS digital Maximum) | +22dBu (+32dBu with Pad) |
| INPUT IMPEDANCE (Mic) | 2.8 kΩ Balanced | 2.8 kΩ Balanced | >3kΩ Balanced |
| INPUT IMPEDANCE (Line) | >8kΩ Balanced | >8kΩ Balanced | >10kΩ Balanced |
| FREQUENCY RESPONSE | ±0.1 dB 20Hz to 22kHz @ min. gain ±1.0 dB 20Hz to 22kHz @ max. gain |
±0.1 dB 20Hz to 22kHz @ min. gain ±1.0 dB 20Hz to 22kHz @ max. gain |
+/-0.5dB 10Hz to 100kHz |
| CROSSTALK | <-91 dBu | <-90 dBu | <-90dBu @ 1kHz & 10kHz |
| THD+N @ 0dBu (1kHz) | 0.0015% (-96.5dBu) | 0.0025% (-92 dBu) | 0.0015% (-96dBu) |
| SNR | 96 dB un-weighted, 99 dB A-weighted | 96 dB un-weighted, 99 dB A-weighted | 96dB |
DI Input
| DI Input | iD4 | iD14 | iD22 |
| DI Gain | -5 to 35 dB | 0 to 66 dB (inc. +10 dB software boost) | -16 to +54 dB (-10dB Pad) |
| MAXIMUM INPUT LEVEL | +8 dBu (0.6% THD typical) | +9 dBu (0.6% THD typical) | +16dBu (typical), +22dBu |
| INPUT IMPEDANCE | >500kΩ Unbalanced | >500kΩ Unbalanced | 1MegΩ Unbalanced |
| FREQUENCY RESPONSE | ±0.1 dB 20Hz to 22kHz | ±0.1 dB 20Hz to 22kHz | +/-0.5dB 10Hz to 50kHz |
| THD+N @ 0dBu (1kHz) |
<0.1% all musical 2nd and 3rd harmonics Typically 0.05% at 0dBu |
<0.04% all musical 2nd and 3rd harmonics | <0.03% (-70dBu) |
| SNR | 87 dB un-weighted, 90dB A-weighted | 95 dB un-weighted, 98 dB A-weighted | 93dB |
ANALOGUE TO DIGITAL CONVERTER
| A/D Converter | iD4 | iD14 | iD22 |
| MAXIMUM INPUT LEVEL | +12 dBu (0 dBFS digital maximum) | +12 dBu (0 dBFS digital maximum) | +18dBu |
| DIGITAL REFERENCE LEVEL | +12 dBu = 0 dBFS | +12 dBu = 0 dBFS | 0dBFS = +18dBu |
| FREQUENCY RESPONSE | ±0.1 dB 10Hz to Fs/2 (flat to nyquist) | ±0.1 dB 10Hz to Fs/2 (flat to nyquist) | +/-0.5dB 10Hz to Fs/2 |
| CROSSTALK | -100 dBu @ 1kHz & 10kHz | -100 dBu @ 1kHz & 10kHz | -100dBu @ 1kHz & 10kHz |
| THD+N @ -1dBFS (1kHz) | <0.001% (-100 dB) | <0.002% (-94 dB) | <0.002% (-94dB) |
|
THD+N @ -6dBFS (1kHz) |
<0.0011% (-99.1 dB) | <0.0015% (-97 dB) | <0.0015% (-97dB) |
| DYNAMIC RANGE | 112 dB un-weighted 114 dB A-weighted |
113 dB un-weighted 116 dB A-weighted |
117dB un-weighted 120dB A-weighted |
DIGITAL TO ANALOGUE CONVERTER
| D/A Converter | iD4 | iD14 | iD22 |
| MAXIMUM OUTPUT LEVEL | +12 dBu (0 dBFS digital maximum) | +12 dBu (0 dBFS digital maximum) | +18dBu |
| DIGITAL REFERENCE LEVEL | +12 dBu = 0 dBFS | +12 dBu = 0 dBFS | 0dBFS = +18dBu |
| OUTPUT IMPEDANCE | <100Ω | <100Ω | <100Ω Balanced |
| FREQUENCY RESPONSE | ±0.1 dB 10Hz to Fs/2 (flat to nyquist) | ±0.1 dB 10Hz to Fs/2 (flat to nyquist) | +/-0.5dB 5Hz to Fs/2 |
| CROSSTALK | <-104 dBu @ 1kHz & 10kHz | <-105 dBu @ 1kHz & 10kHz | -110dBu @ 1kHz & 10kHz |
| THD+N @ -1dBFS (1kHz) | <0.0015% (-96.5 dB) | <0.003% (-90.5 dB) | <0.0008% (-101dB) |
| DYNAMIC RANGE | 112 dB un-weighted 115 dB A-weighted |
114 dB un-weighted 117 dB A-weighted |
110dB un-weighted 114dB A-weighted |
Headphone Output
| Headphone Output | iD4 | iD14 | iD22 |
| MAXIMUM OUTPUT LEVEL | +12 dBu (0dBFS digital maximum) | +12 dBu | +18dBu |
| DIGITAL REFERENCE LEVEL | +12 dBu = 0 dBFS | +12 dBu = 0 dBFS | 0dBFS = +18dBu |
| VOLTAGE GAIN | +6 dB (optimised for loudness) | +6 dB (optimised for loudness) | +6 dB (optimised for loudness) |
| OUTPUT IMPEDANCE | <30 Ω Balanced | <30 Ω Balanced | <50Ω Balanced |
| FREQUENCY RESPONSE | ±1.0 dB 10Hz to Fs/2 (load dependant) | ±1.0 dB 10Hz to Fs/2 (load dependant) | +/-0.5dB 5Hz to Fs/2 |
| CROSSTALK | -98 dBu @ 1kHz & 10kHz | -100 dBu @ 1kHz & 10kHz | -110dBu @ 1kHz & 10kHz |
| THD+N @ -1dBFS (1kHz) | <0.0012% (-98.4 dB) | <0.002% (-94 dB) | <0.0008% (-101dB) |
| DYNAMIC RANGE | 106 dB un-weighted 108 dB A-weighted |
108 dB un-weighted 111 dB A-weighted |
110dB un-weighted 114dB A-weighted |
| MAX LEVEL INTO 30ohms | +3 dBu, 0.008% THD+N, Power: 80mW | +4 dBu, 0.005% THD+N, Power: 101mW | +8dBu, 0.0032% THD+N Power: 250mW |
| MAX LEVEL INTO 60ohms | +6 dBu, 0.005% THD+N, Power: 80mW | +5 dBu, 0.004% THD+N, Power: 64mW | +11dBu, 0.0022% THD+N Power: 300mW |
| MAX LEVEL INTO 600ohms | +12 dBu, 0.0025% THD+N, Power: 31mW | +13 dBu, 0.0025% THD+N, Power: 39mW | +17.2dBu, 0.0013% THD+N Power: 105mW |
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