Focusrite ISA 828 (pré ampli)

-Gain range (Mic) 0 dB to 60 dB in 10 dB steps
-Input Impedance (Mic) Variable, 600O, 1k4O, 2k4O, 6k8O
-Noise at main output with gain at unity (0 dB) (Mic) -97 dBu measured with a 22 Hz / 22 kHz bandpass filter
-Signal to noise ratio relative to max headroom (9dBu) (Mic) 106 dB
-THD at medium gain (30dB) (Mic) 0.0008 measured with a 1 kHz -20 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
-Frequency response at minimum gain (0 dB) (Mic) -0.5 dB down at 10 Hz and –3 dB down at 110kHz
-Frequency response at maximum gain (60 dB) (Mic) –3 dB down at 16 Hz and –3 dB down 85 kHz
-CMRR (Mic) 91.8 dB (Channel 1, 1 kHz, maxiumum gain)

-Input Impedance (Line) 10 kO from 10 Hz to 200 kHz
-Gain range (Line) -20 dB to 10 dB in 10 dB steps
-Noise at main output with gain at unity (0 dB) (Line) -96 dBu measured with a 22 Hz / 22 kHz bandpass filter
-Signal to noise ratio relative to max (Line) 120 dB
-Signal to noise ratio relative to 0dBFS( 22dBu) (Line) 118dB
-THD at unity gain (0dB) (Line) 0.001 measured with a 0 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
-Frequency Response at unity gain (0dB) (Line) 0.3 dB down at 10 Hz and –3 dB down at 122 kHz

-Gain range (Instrument) 10 dB to 40 dB continuously variable
-Input Impedance (Instrument) 1 MO or 300 kO
-Noise at minimum gain ( 10 dB) (Instrument) -90 dBu measured with a 22 Hz / 22 kHz bandpass filter
-Noise at maximum gain ( 40 dB) (Instrument) -62 dBu measured with a 22 Hz / 22 kHz bandpass filter
-THD at minimum gain ( 10 dB) (Instrument) 0.002 measured with a 10 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
-Frequency Response at 10 dB gain with -10 dB input (Instrument) 10 Hz – 200 kHz /- 0.6 dB
-Frequency Response at 40 dB gain with -40 dB input (Instrument) -2.5 dB down at 10 Hz and 0 dB at 200 kHz
-Roll off 18 dB per octave 3 pole filter
-Frequency (Instrument) : Fixed 75Hz measured at the 3dB down point