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iD4 Detailed Specs

MICROPHONE PREAMPLIFIER:

(measurement includes ADC signal path)

MIC GAIN: 0 to 58 dB 
LINE GAIN: -10 to 48 dB (-10dB hardwired line pad)
PHANTOM POWER: 48V ±4V @ 10mA/Channel
MIC EIN: <-126.0 dBu
CMRR: >75 dB @ 1kHz
MAXIMUM INPUT LEVEL: +12 dBu (0 dBFS digital Maximum)
INPUT IMPEDANCE (Mic): 2.8 kΩ Balanced
INPUT IMPEDANCE (Line): >8kΩ Balanced
FREQUENCY RESPONSE: ±0.1 dB 20Hz to 22kHz @ min. gain
±1.0 dB 20Hz to 22kHz @ max. gain
CROSSTALK: <-91 dBu
THD+N @ 0dBu (1kHz): 0.0015% (-96.5dBu)
SNR: 96 dB un-weighted, 99 dB A-weighted
XLR Combi Female Pin 2 (Hot), Pin 3 (Cold) & Pin 1 (Shield)
1/4" TRS Jack Tip (Hot), Ring (Cold) & Sleeve (Shield)

 

D.I (Channel 1):

D.I GAIN: -5 to 35 dB
MAXIMUM INPUT LEVEL: +8 dBu (0.6% THD typical)
INPUT IMPEDANCE: >500kΩ Unbalanced
FREQUENCY RESPONSE: ±0.1 dB 20Hz to 22kHz
THD+N @ 0dBu (1kHz): <0.1% all musical 2nd and 3rd harmonics

 

Typically 0.05% at 0dBu

SNR: 87 dB un-weighted, 90dB A-weighted
1/4” JACK: TIP (Hot) & SLEEVE (Shield)

 

ANALOGUE TO DIGITAL CONVERTER (ADC 1 & 2):

(measured sans microphone preamplifier under AES-17)

MAXIMUM INPUT LEVEL: +12 dBu (0 dBFS digital maximum)
DIGITAL REFERENCE LEVEL: +12 dBu = 0 dBFS
FREQUENCY RESPONSE: ±0.1 dB 10Hz to Fs/2 (flat to nyquist)
CROSSTALK: -100 dBu @ 1kHz & 10kHz
THD+N @ -1dBFS (1kHz): <0.001% (-100 dB)
THD+N @ -6dBFS (1kHz): <0.0011% (-99.1 dB)
DYNAMIC RANGE: 112 dB un-weighted
114 dB A-weighted

 

DIGITAL TO ANALOGUE CONVERTER (DAC 1&2):

(measured under AES-17 at line outputs 1&2)

MAXIMUM OUTPUT LEVEL: +12 dBu (0 dBFS digital maximum)
DIGITAL REFERENCE LEVEL: +12 dBu = 0 dBFS
OUTPUT IMPEDANCE <100Ω
FREQUENCY RESPONSE: ±0.1 dB 10Hz to Fs/2 (flat to nyquist)
CROSSTALK: <-104 dBu @ 1kHz & 10kHz
THD+N @ -1dBFS (1kHz): <0.0015% (-96.5 dB)
DYNAMIC RANGE: 112 dB un-weighted
115 dB A-weighted
1/4" TRS Jack Tip (Hot), Ring (Cold) & Sleeve (Shield)

 

DUAL HEADPHONE OUTPUT:

MAXIMUM OUTPUT LEVEL: +12 dBu (0dBFS digital maximum)
DIGITAL REFERENCE LEVEL: +12 dBu = 0 dBFS
VOLTAGE GAIN: +6 dB (optimised for loudness)
OUTPUT IMPEDANCE: <30 Ω Balanced
FREQUENCY RESPONSE: ±1.0 dB 10Hz to Fs/2 (load dependant)
CROSSTALK: -98 dBu @ 1kHz & 10kHz
THD+N @ -1dBFS (1kHz): <0.0012% (-98.4 dB)
DYNAMIC RANGE: 106 dB un-weighted
108 dB A-weighted
MAX LEVEL INTO 30ohms: +3 dBu, 0.008% THD+N, Power: 80mW
MAX LEVEL INTO 60ohms: +6 dBu, 0.005% THD+N, Power: 80mW
MAX LEVEL INTO 600ohms: +12 dBu, 0.0025% THD+N, Power: 31mW
1/4” TRS JACK: TIP (Left), RING (Right) & SLEEVE (Shield)
1/8” MINI JACK: TIP (Left), RING (Right) & SLEEVE (Shield)

 

USB 2.0 HIGH SPEED:

BUS POWER: 500mA @5V System Limit
420mA @5V Maximum (No 48V)
No. of INPUT CHANNELS: 2 (2 Analogue)
No. of OUTPUT CHANNELS: 2 (2 Analogue)
DSP MIXER LATENCY: ROUND TRIP (in-to-out)

 

44.1kHz 1.583ms
48.0kHz 1.458ms
88.2kHz 0.792ms
96.0kHz 0.729ms

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