Gain range (Mic)
0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
Dual Channel Classic ISA Mic Preamp/DI
Two channels of classic Focusrite mic pres
Focusrite's ISA Two brings together a totally independent pair of classic ISA microphone preamps from the original ISA 110 module, combining the best of traditional solid-state electronics with the original input transformer specified by Rupert Neve – the Lundahl LL1538.
Each mic pre has the option of mic, line or the front-panel instrument input, with variable input impedance to ensure you are getting the best performance from the source. Up to 60dB of gain is available on the first four-position rotary and gain range switches, with a further +20dB of continuously variable trim, meaning a huge 80dB of gain is available should it be required. The high-pass filter features variable cut-off frequency between 16 and 420Hz. A pair of 8-segment LED meters show peak signal level in dBFS, while a rear-panel pot allows calibration to suit your A-D converters. Rear-panel insert points allow the use of inline processors such as compression.
Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
Front-panel instrument inputs
Dedicated TRS line input socket with front-panel switch
Switchable input impedance including classic ISA 110 setting
Dedicated insert points
User-calibrated peak-level meters
Brainworx bx_console Focusrite – exclusive plug-in that faithfully captures the sound, feel and styling of the original Focusrite ISA 110 Equaliser and ISA 130 Dynamics Modules.
specifications
Mic Input Response
EIN (Mic)
Measured at 60 dB of gain with 150 O source impedance and 22 Hz-22 kHz band pass filter -127 dB
Noise (Mic)
Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter -97 dBu
Frequency Response (Mic)
At minimum gain (0 dB)-0.5 dB at 10 Hz,?-1 dB at 135 kHz, relative to 1 kHz
At 60 dB gain (Mic)
-6 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
Crosstalk Channel to Channel (Mic)
Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB
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test+O
Line Input Response
Gain range (Line)
-20 dB to 10 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
Input Impedance (Line)
10 kO from 10 Hz to 200 kHz
Frequency Response (Line)
At minimum gain (0 dB)-0.3 dB at 10 Hz, -1 dB at 80 kHz, relative to 1 kHz
Crosstalk Channel to Channel (Line)
Line input, with I/P = 0 dBu, gain = 0dB @ 1 kHz input to channel AChannel B output?= -91 dB
Instrument Input Response
Gain range (Instrument)
10 dB to 40 dB continuously variable trim
Input Impedance (Instrument)
2 MO
Noise (Instrument)
Measured with 22 Hz-22 kHz band pass filterMinimum gain ( 10 dB) = -95 dBu
Frequency Response (Instrument)
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) (Instrument)
-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)
Weight and Dimensions
W x D x H
480 mm x 280 mm x 44 mm
Weight
3.7 kg
