Focusrite ISA TWO, User Manual

Page: 13 / 15

13
PERFORMANCE AND SPECIFICATIONS
Microphone Inputs
All measurements taken at minimum gain, Z In: medium, unless otherwise stated. Measurements taken at the analogue outputs
Gain Range
0 to 30 dB, or 30 to 60 dB with ‘30-60’ switch enabled, in 10 dB steps,
plus 0 to 20 dB of continuous trim
Maximum Input Level +7 dBu
Input Impedance Transformer balanced, Low: 600 Ω, ISA 110: 1.4 kΩ, Medium: 2.4 kΩ, High: 6.8 kΩ
Signal-to-Noise Ratio 122 dB ‘A’-Weighted (typical),
maximum gain
Frequency Response 20 Hz – 20 kHz ± 0.2 dB | 10 Hz – 110 kHz ± 1.5 dB
THD + N -92 dB (0.0025%) @ -1 dBr
High-Pass Filter 18 dB/octave, switchable, variable frequency: 16 – 420Hz
EIN
<
-123 dBu ‘A’-Weighted (typical),
maximum gain
Common Mode Rejection
Ratio
-93 dB @ 1kHz
Line Inputs
All measurements taken at minimum gain, Z In: Low, unless otherwise stated, R
S
= 50
Ω
. Measurements taken at the analogue outputs
Gain Range
-20 to +10 dB in 10 dB steps, plus 0 to 20 dB continuous trim
Maximum Input Level +25 dBu
Input Impedance Electronically balanced 10 kΩ
Signal-to-Noise Ratio 122 dB ‘A’-Weighted (typical),
maximum gain
Frequency Response 20 Hz – 20 kHz ± 0.1 dB | 10 Hz – 122 kHz ± 3 dB
unity gain
THD + N -91 dB (0.0028%) @ -1 dBr
High-Pass Filter 18 dB/octave, switchable, variable frequency: 16 – 420Hz
Common Mode Rejection
Ratio
-65 dB @ 1 kHz
Instrument Inputs
All measurements taken at minimum gain, Z In: Low, unless otherwise stated, R
S
= 600
Ω
. Measurements taken at the analogue outputs
Gain Range
+10 to +40 dB continuous, using Trim pot
Maximum Input Level
+18 dBu
Input Impedance
Low: 470 kHz, High: 2.4 MΩ
Signal-to-Noise Ratio
100 dB ‘A’-Weighted
Frequency Response 20 Hz – 20 kHz ±0.1 dB | 10 Hz – 110 kHz ± 1.2 dB
THD + N
-83 dB (0.0071%) @ -1 dBFS
High-Pass Filter 18 dB/octave, switchable, variable frequency: 16 – 420Hz