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MICROPHONE PREAMPLIFIER:
(measurement includes ADC signal path)

MIC GAIN:   0 to 66 dB (inc. +10 dB software boost)
LINE GAIN:   -10 to 56 dB (-10dB hardwired line pad)
PHANTOM POWER:   48V ±4V @ 10mA/Channel (12VDC only)*
MIC EIN:   <-127.0 dBu
CMRR:   >80 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:   <-90 dBu
THD+N @ 0dBu (1kHz):   0.0025% (-92 dBu)
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:   0 to 66 dB (inc. +10 dB software boost)
MAXIMUM INPUT LEVEL:   +9 dBu (0.6% THD typical)
INPUT IMPEDANCE:   >500kΩ Unbalanced
FREQUENCY RESPONSE:   ±0.1 dB 20Hz to 22kHz
THD+N @ 0dBu (1kHz):   <0.04% all musical 2nd and 3rd harmonics
SNR:   95 dB un-weighted, 98 dB 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):   <0.002% (-94 dB)
THD+N @ -6dBFS (1kHz):   <0.0015% (-97 dB)
DYNAMIC RANGE:   113 dB un-weighted
116 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 Balanced
FREQUENCY RESPONSE:   ±0.1 dB 10Hz to Fs/2 (flat to nyquist)
CROSSTALK:   <-105 dBu @ 1kHz & 10kHz
THD+N @ -1dBFS (1kHz):   <0.003% (-90.5 dB)
DYNAMIC RANGE:   114 dB un-weighted
117 dB A-weighted
1/4" TRS Jack   Tip (Hot), Ring (Cold) & Sleeve (Shield)

HEADPHONE OUTPUT (DAC 3&4):
(measured under AES-17 at phones output)

MAXIMUM OUTPUT LEVEL:   +12 dBu
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:   -100 dBu @ 1kHz & 10kHz
THD+N @ -1dBFS (1kHz):   <0.002% (-94 dB)
DYNAMIC RANGE:   108 dB un-weighted
111 dB A-weighted
MAX LEVEL INTO 30ohms:   +4 dBu, 0.005% THD+N, Power: 101mW
MAX LEVEL INTO 60ohms:   +5 dBu, 0.004% THD+N, Power: 64mW
MAX LEVEL INTO 600ohms:   +13 dBu, 0.0025% THD+N, Power: 39mW
1/4” JACK:   TIP (Left), RING (Right) & SLEEVE (Shield)

DIGITAL INPUT:
8-CHANNEL ADAT:   44.1kHz to 48kHz
4-CHANNEL ADAT:   88.2kHz to 96kHz SMUX
STEREO S/PDIF / TOSLINK   44.1kHz to 96kHz (Stereo)

Характеристики Focusrite Scarlett 2i4:

Supported Sample Rates
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz

Microphone Inputs
Frequency Response

20 Hz - 20 kHz ± 0.1dB

Dynamic Range

106 dB (A-Weighted)

THD+N

<0.002% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

Noise EIN

< -126 dBu (A-Weighted)

Maximum input level

+4 dBu

Gain Range

50 dB

Impedance

3k Ω

Line Inputs
Frequency Response

20 Hz - 20 kHz ± 0.1dB

Dynamic Range

106 dB (A-Weighted)

THD+N

<0.003% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

Maximum input level

+22 dBu

Gain Range

50 dB

Impedance

52k Ω

Instrument Inputs
Frequency Response

20 Hz - 20 kHz ± 0.1dB

Dynamic Range

106 dB (A-Weighted)

THD+N

<0.02% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

Maximum input level

+13 dBu

Gain Range

50 dB

Impedance

1M Ω

Line & Monitor Outputs
Dynamic Range Outputs (1-2)

106 dB (A-Weighted)

Dynamic Range Outputs (3-4)

103 dB (A-Weighted)

Maximum Output Level (0 dBFS) Balanced Line/TRS Outputs

+10 dBu

Maximum Output Level (0 dBFS) Unbalanced Line/RCA Outputs (1-4)

+5.5 dBu

THD+N Outputs (1-2)

<0.001% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

THD+N Outputs (3-4)

<0.008% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

Impedance (TRS Outputs)

94 Ω (Balanced)

Impedance (RCA Outputs)

47 Ω

Headphone Outputs
Dynamic Range

107 dB (A-Weighted)

THD+N

<0.001% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)

Maximum Output Level

> +7.8dBu

Impedance

10 Ω