The Focusrite ISA Two Preamp provides two of Focusrite’s prestigious transformer-based microphone preamps. It features the same classic circuitry and renowned audio quality found in the original at a new level of affordability. With selectable input impedance, direct instrument inputs and insert points, the ISA Two creates the perfect front end for the discerning recording professional.
The Focusrite ISA Two Preamp 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. The Focusrite ISA Two Preamp offers two channels of classic Focusrite mic pres. 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 ISA Two Preamp 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
Focusrite ISA Two Preamp Specifications
- Mic Input Response:
- Gain Range (Mic): 0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
- EIN (Mic): Measured at 60 dB of Gain with 150 ohm 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
- 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 k ohm 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 A Channel B Output= -91 dB
- Instrument Input Response:
- Gain Range (Instrument): 10 dB to 40 dB Continuously Variable Trim
- Input Impedance (Instrument): 2 M ohm
- Noise (Instrument): Measured with 22 Hz-22 kHz Band Pass Filter, Minimum 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
Focusrite ISA Two Preamp Includes
- Focusrite ISA Two Preamp
- IEC Power Cable
- User Guide
- 2 Year Warranty
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