Focusrite ISA Two Rackmount 2-Channel Microphone Preamp - Manual (Page 17)

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English
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
Frequency Response
At minimum gain (+10 dB)
-0.1 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz
At maximum gain (+40 dB)
-2.5 dB at 10 Hz,
-1 dB at 110 kHz, relative to 1 kHz
High Pass Filter
Roll-Off 18 dB per octave (3 pole filter)
Frequency Range Continuously variable from 16 Hz to 420 Hz (-3 dB)
Physical and Electrical Characteristics
Weight and Dimensions
W x D x H 480 mm x 280 mm x 44 mm
Weight 3.7 kg