Focusrite Isa Two

THÔNG SỐ KỸ THUẬT:
Front panel, per channel
1/4″ instrument input
Variable input impedance – Low, ISA 110, Medium, High
Input selection – Mic, Line, Instrument
0 – 30 dB/30 – 60 dB gain switch
Phantom power switch
Phase invert switch
0 – 60 dB gain in 10 dB steps
0 – +20 dB continuously variable trim
Variable high-pass filter with on/off switch
Insert point on/off switch
Eight-LED user-calibrated level meters
Single power switch
Rear panel, per channel
XLR-F mic inputs
1/4″ TRS line inputs
1/4″ TRS Sends
1/4″ TRS Returns
XLR-M line output
Single peak meter calibration dial
Single IEC power socket
Maximum Input and Output Levels
Maximum Output Level +24 dBu with a THD+N < 0.01% at 1kHz measured with 150 Ω source impedance and 22Hz/22kHz band-pass filter
Maximum Microphone Transformer Input Level +7 dBu with a THD+N < 0.7% at 1kHz measured at 0 dB of gain with 150 Ω source impedance and 22Hz/22kHz band-pass filter
Mic Input Response
Gain range 0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim
Input Impedance Switched Impedance setting
Equivalent Input Impedance at 1 kHz Low = 600 Ω
ISA 110 = 1.4 kΩ
Med = 2.4 kΩ
High = 6.8 kΩ
EIN (Equivalent Input Noise) Measured at 60 dB of gain with 150 Ω source impedance and 22 Hz-22 kHz band pass filter -127 dB
Noise Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter -97 dBu
Signal-to-Noise Ratio Measured with 150 Ω source impedance and 22 Hz-22 kHz band pass filter 121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter < 0.0007% at 1 kHz

At +60 dB gain -6 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
CMRR (Common Mode Rejection Ratio) -94 dB for mic input at 60 Hz for max. output = +24 dBu
-91 dB for mic input at 10 kHz for max. output = +24 dBu
Crosstalk Channel to Channel Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB
Line Input Response
Gain range -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim
Input Impedance 10 kΩ from 10 Hz to 200 kHz
Noise Noise at main output with gain at unity (0 dB) measured with 50 Ω source impedance and a 22Hz – 22 kHz band pass filter -97 dBu
Signal-to-Noise Ratio Measured with 50 Ω source impedance and a 22 Hz-22 kHz band pass filter 121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise Measured with a 0 dBu input signal, +10 dB of gain and a 22 Hz-22 kHz band pass filter < 0.0002% at 1 kHz
Frequency Response At minimum gain (0 dB) -0.3 dB at 10 Hz, -1 dB at 80 kHz, relative to 1 kHz

Instrument Input Response
Gain range +10 dB to +40 dB continuously variable trim
Input Impedance 2 MΩ
Noise Measured with 22 Hz-22 kHz band pass filter Minimum gain (+10 dB) = -95 dBu

High-Pass Filter
Roll-Off 18 dB per octave (3 pole filter)
Frequency Range Continuously variable from 16 Hz to 420 Hz (-3 dB)
Weight and Dimensions
W x D x H 480 mm x 280 mm x 44 mm
Weight 3.7 kg