Focusrite ISA Two Classic Dual Mono Transformer-based Microphone Preamplifier

ITEM #: FCSR-ISATWO MFG #: ISA TWO

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$1,129.99

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$899.99

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ISA TWO - Overview

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.

  • 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
     
  • Specifications:

    • Mic Input Response
    • Gain Range: 0dB - 60dB in 10dB steps, plus 0dB - 20dB continuously variable trim
    • EIN: Measured @ 60dB of gain with 150Ω source impedance and 22Hz - 22kHz band pass filter -127dB
    • Noise: Noise at output with unity gain (0dB) and 22Hz - 22kHz band pass filter -97dBu
    • Frequency Response: At minimum gain (0dB) -0.5dB @ 10Hz, -1dB @ 135kHz, relative to 1kHz
    • At 60dB Gain: -6dB @ 10Hz, -1dB @ 115kHz, relative to 1kHz
    • Crosstalk Channel To Channel: Mic input, with I/P = 0dBu, gain = 0dB @ 1kHz input to Channel A, Channel B output = -85dB

      Line Input Response
    • Gain Range: -20dB - 10dB in 10dB steps, plus 0dB - 20dB continuously variable trim
    • Input Impedance: 10kΩ from 10Hz - 200kHz
    • Frequency Response: At minimum gain (0dB) -0.3dB @ 10Hz, -1dB @ 80kHz, relative to 1kHz
    • Crosstalk Channel To Channel: Line input, with I/P = 0dBu, gain = 0dB @ 1kHz input to Channel A, Channel B output= -91dB

      Instrument Input Response
    • Gain Range: 10dB - 40dB continuously variable trim
    • Input Impedance: 2MΩ
    • Noise: Measured with 22Hz - 22kHz band pass filter, Minimum gain (10dB) = -95dBu
    • Frequency Response: At minimum gain (10dB)-0.1dB @ 10Hz, -1dB @ 115 kHz, relative to 1 kHz
    • At Maximum Gain (40 dB): -2.5dB @ 10Hz, -1dB @ 110kHz, relative to 1kHz

      High Pass Filter
    • Roll-Off: 18dB per octave (3 pole filter)
    • Frequency Range: Continuously variable from 16Hz - 420Hz (-3dB)

      Physical
    • Dimensions (HxWxD): 1.7" x 18.9" x 11"
    • Weight: 8.2lbs
     
  • Warranty:

    • 2 Year
     
  • GTIN:

    0815301005148
     

ISA TWO - Required Accessories

    California Residents:
    WARNING:
    Cancer and Reproductive Harm - www.P65Warnings.ca.gov