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.
Focusrite Pro ISA Two Features
- 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
- 3 Year Warranty
- ISA Two preamp1
- Brainworx bx_console1
- Mic input response
- Gain range: 0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
- EIN: measured at 60 dB of gain with 150 O 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
- Frequency response: At minimum gain (0 dB)-0.5 dB at 10 Hz,?-1 dB at 135 kHz, relative to 1 kHz
- At 60 DB gain: -6 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
- 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 kO from 10 Hz to 200 kHz
- Frequency response: At minimum gain (0 dB)-0.3 dB at 10 Hz, -1 dB at 80 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)
